Structural Vibration IEEE PAPER
Damping models for structural vibration
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Abstract This dissertation reports a systematic study on analysis and identification of multiple parameter damped mechanical systems. The attention is focused on viscously and non- viscously damped multiple degree of freedom linear vibrating systems. The non-viscous
Fuzzy control of structural vibration. An active mass system driven by a fuzzy controller
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Summary The authors are engaged in a long-term research project studying the potential of fuzzy control strategies for active structural control in civil engineering applications. The advantage of this approach is its inherent robustness and its ability to handle the non
Propeller induced structural vibration through the thrust bearing
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ABSTRACT Propeller induced structural vibration through the thrust bearing is an important source for low frequency shipboard noise and underwater sound radiation from a submarine hull. Such vibration is investigated using a scaled experimental model. This research
Structural vibration control using semiactive tuned mass damper
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ABSTRACT The main purpose of this study is to show the sufficient control performance of semiactive tuned mass damper and to identify a suitable control method for semiactive tuned mass damper in structural vibration control. In this study, four control algorithms are
General evolutionary path for fundamental natural frequencies of structural vibration problems: towards optimum from below
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Abstract. In this paper, both an approximate expression and an exact expression for the contribution factor of an element to the natural frequency of the nite element discretized system of a structure in general and a membrane in particular have been derived from the
Structural vibration energy harvesting by magnetostrictive materials (MsM)
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Abstract: This paper proposes a new energy harvesting scheme based on magnetostrictive materials (MSM). It consists of three constituent components: an energy converter comprising of a Metglas giant magnetostrictive alloy and a pick-up coil; an energy
Semi active Control of Adaptive Friction Dampers for Structural Vibration Control
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ABSTRACT Reduction of structural vibrations is of major interest in mechanical engineering for lowering sound emission of vibrating structures, improving accuracy of machines and increasing structure durability. Besides design optimization and passive damping
Identification of linear structural systems using earthquake-induced vibration data
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Abstract. This paper addresses the issue of system identification for linear structural systems using earthquake induced time-histories of the structural response. The proposed methodology is based on the Eigensystem Realization Algorithm (ERA) and on the
Dynamic modulus estimation and structural vibration analysis
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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability
Artificial neural networks for structural vibration control
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ABSTRACT An optimal control algorithm using neural networks is proposed. Controller neural network is trained by a training rule developed to minimize cost function. Not only linear structure but nonlinear structure can be controlled by proposed neuro-controller.
An efficient finite element approach for reduction of structural vibration and acoustic radiation by passive shunted piezoelectric systems
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Abstract. The present work concerns the numerical modeling of noise and vibration reduction of thin radiating structures in the low frequency range by using shunted piezoelectric elements. The aim is to propose an efficient approach able to predict the
Application of a tunable electromagnetic damper in suppression of structural vibration
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Abstract An electromagnetic damper is developed to construct a tunable damped dynamie vibration absorber. The developed vibration absorber can suppress vibration of a structure subjected to a harmonic force with variable frequency. The damping of the vibration
Modelling and analysis of acoustic emissions and structural vibration in a wind turbine
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Abstract: The onshore wind turbine industry must overcome many technical, commercial, and environmental difficulties. A significant element for planning consent is operational noise. Acoustic limits are strictly enforced and can lead to near-neighbour complaints as
Simultaneous topology optimization and optimal control for vibration suppression instructural design
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Abstract This work presents a structural topology optimization methodology for a cantilever beam, which includes an optimal control design for reducing vibrations. The topology optimization in this paper uses homogenization design method, based on the concept of
Vibration control of high-precision machines with active structural elements
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Modern technology to a great extent relies on the use of high-precision equipment. On the one hand, high precision is essential for the ongoing trend of miniaturisation in manufacturing, a striking example of which is found in electronics industry, with integrated
Linking of modal and finite elements in structural vibration analysis
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ABSTRACT A modal element is defined as a body or substructure described solely through its natural vibration properties: angular eigenfrequencies wn, modal masses mn, and a number of pertinent eigenmode trans lations and rotations p at discrete positions of
Weight Reduction of Structural Vibration Isolation Hydro-Mount Bracket through Design Analysis and Use of Advanced High Strength Steels
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ABSTRACT Vibration Isolation Mounts are designed to isolate noise, reduce resonant vibration and lower structure-borne noise. The external mounting bracket that encases the fluid filled inner mount is usually made from relatively thick (~ 3 mm) high strength low
Recent Advances of Structural Vibration Control in Mainland China
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ABSTRACT Structural vibration control has become a workable technology to protect infrastructure against earthquake and wind loads. Serious efforts have been undertaken in past two decades in mainland China and fruit achievements have been made in this area.
Three-dimensional vibration analysis of structural elements using chebyshev ritz method
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The understanding of structural vibration characteristics is of paramount importance to engineers to ensure a reliable and lasting design. Many calamitous incidents have shown the destructive nature of vibration in civil engineering such as the dramatic collapse of
Complex stiffness measurement of vibration-damped structural elements
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ABSTRACT As vibration suppression technology has matured, the application of viscoelastic materials in passive damping mechanisms has proven to be a reliable means toward improved structural dynamics. This paper discusses general steps required in
Assessing a dam's structural properties using forced vibration testing
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Summary In the context of the safety assessment of a dam the question after the nature of the boundary conditions in the contact lines dam/surroundings arose. Performance of a Forced Vibration Test with subsequent Finite Element model updating was chosen to
Field measurements of natural periods of vibration and structural damping of wind-excited tall residential buildings
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Abstract. Field measurements of the wind-induced response of two residential reinforced concrete buildings, among the tallest in the world, have been performed during two typhoons. Natural periods and damping values have been determined and compared with
Sound and Structural Vibration
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Sound and StructuralVibration Radiation, Transmission and ResponseSound Radiation by Plates in Multi-Mode Flexural VibrationFormulation in Terms of Structural ModesFormulation in Terms of Elementary Radiator's
Structural dynamic model modification using vibration test data
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ABSTRACT A method of improving the analytical structural dynamic models has been successfully derived to make them agree with measured natural frequencies and normal mode shapes. In the analysis, both the theoretical mass and stiffness matrices are modi
Vibration-based on-line fault detection in non-stationary structural systems via a statistical model based method
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ABSTRACT The problem of vibration based on line fault detection in non-stationary structural systems is considered, and a statistical model based method is introduced. The method is based upon baseline structural modelling using non-stationary Functional
Validation of vibroacoustic modulation of wind turbine blades for structural health monitoring using operational vibration as a pumping signal
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ABSTRACT This paper presents a crack detection technique for wind turbine blades using VibroAcoustic Modulation. This technique identifies the nonlinear characteristics of a blade by utilizing the wind turbine operational vibration as a pumping signal. The underlying Optimal design of structures leads, as a rule, to slender and thin-walled shapes of the elements, and such elements are subject to the loss of stability. Hence the constraints of structural optimization usually include stability constraints. Loading parameters
Shape memory alloys in structural vibration control
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ABSTRACT: The unique superelastic behaviour exhibited by shape memory alloys (SMAs) allows the material to recover after withstanding large deformations. This recovery takes place without any residual strains, while dissipating a considerable amount of energy.
Compendium of Formulas for the Structural Vibration Frequency Analysis of Beams
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Fundamental natural frequency is an important parameter in structural dynamics analysis and applications. A number of simple formulas for the computation of the fundamental natural frequency of beam vibration under a variety of boundary conditions and loading ABSTRACT A boundary clement method is presented for the coupled motion analysis of structural vibration with small-amplitude fluid sloshing in two-dimensional space. The linearized Navier-Stokes equations arc considered in frequency domain and transformed
Structural analysis for the HANARO irradiation capsule through vibration test
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ABSTRACT The instrumented capsule is subject to flow-induced vibration (FIV) due to the flow of the primary coolant and then the structural integrity of the capsule during irradiation in the HANARO reactor is an issue of major concern. For this purpose the acceleration was
Active control of structural vibration transmission between two plates connected by a set of active mounts
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ABSTRACT This report presents the results of the research activity carried out at IS VR within a collaborative program whose acronym is AIRAT:" Active Isolator Research for Aircraft Trim Panels". The main goal of the project is to study and develop an active
A primer of random vibration techniques in structural engineering
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Abstract. A review of random vibration techniques for analyzing dynamic systems is presented from the perspective of applicability to structural engineering. Problems involving
Vibration-based structural health monitoring of highway bridges
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it is a well established fact that structural damage results in a change in mass, stiffness and/or damping of the structure. These changes in turn exhibit themselves in the dynamic characteristics of the structure as
Vibration-based non destructive structural damage detection
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Evaluate the effect of turbine period of vibration requirements on structural design parameters: technical report of findings
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EXECUTIVE SUMMARY Coincidence of structural resonances with wind turbine dynamic forces can lead to large amplitude stresses and subsequent accelerated fatigue. For this reason, the wind turbine rotor blades and support structure are designed to avoid
Use of vibration data for structural health monitoring of bridges
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Abstract Accurate and timely assessment of maintenance and repair requirements of bridges is important for ensuring public safety and for efficient allocation of limited resources by road transportation authorities. Periodic visual inspections have so far been the typical
Diagnosis of structural integrity using the nonlinear vibration technique
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Abstract: This paper refers to a study based on theoretical and experimental data regarding the impact of the vibration came from technological equipment functioning with intensive and various activities, environmental propagated (human and building). The aim of the
Measurement of structural response characteristics of full-scale buildings: Comparison of results from strong-motion and ambient vibration records
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ABSTRACT This report describes the collection and analysis of ambient vibration data from five buildings in the San Francisco Bay area that experienced strong shaking during the Loma Prieta earthquake of. The buildings represent a range of
Fiber optic vibration sensors for structural control applications
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In order to control the behavior of aerospace structures in real time, closed loop control systems require highly accurate measurements of the vibrational frequencies and amplitudes exhibited by structures at any given instant. Traditionally, this has meant the
Structural optimization of vibration isolation devices for high performances
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Abstract:This paper is a summary of the large study regarding the isolation performances improvement of the vibration isolation devices. The main area of this study was framed by the passive isolation, using different structural configurations, based on the compressing
A field investigation of vibration-based structural health monitoring in a steel truss bridge
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ABSTRACT: This paper presents an investigation to seek the applicability of vibration-based technique to structural health monitoring of steel truss bridges. A Warren truss bridge for road traffic in-service for more than 40 years was used in this investigation. There were a
Structural acoustic vibration reduction using piezoelectric shunt techniques: FE formulation and reduced order model
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Abstract. For noise and vibration attenuation, various approaches can be employed depending on the frequency range to attenuate. Generally, active or passive piezoelectric techniques are effective in the low frequency range, while dissipative materials, such as
Vibration based structural health monitoring of a composite plate structure with multiple stiffeners
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A vibration based damage identification method is investigated experimentally. The dynamic response of an intact and a locally damagedlayer unidirectional carbon fibre PEKK reinforced plate structure with two stiffener sections is considered. A forced vibration set
A Bayesian approach to vibration based structural health monitoring with experimental verification
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Summary. In this paper we present a damage identification method for use in structural health monitoring. Our method uses Bayesian inference to solve the inverse problem of locating structural damage based on measurements of vibrational parameters of the
Development of vibration experiment education materials for structural and soil dynamics
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ABSTRACT: A series of dynamic vibration experiment and educational devices, collectively named 'BURURU'are developed to facilitate and improve education regarding structural and soil dynamics for university students and professional engineers, and to encourage
Structural Optimization of Distributed Actuation System for Improve an Efficiency of Smart Composite Spar Vibration Damping
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Abstract The possibilities to change of rotor blade local bend or twist with aid of distributed power actuators is the necessary condition for adaptive vibration control efficiency. For electronic control schema need also the sufficiently fast response that require diminishing
Challenges in experimental vibration analysis for structural identification and corresponding engineering strategies
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ABSTRACT: Structural identification (St-Id) of long-span bridges by vibration testing under operation provides a starting point for quantitatively characterizing the in-service mechanical characteristics and behaviours of these complex constructed systems by designing and
Damage detection and health monitoring based on vibration measurements and recognition algorithms in real-scale aeronautical structural components
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Abstract Purpose of the paper is to present a new application of a NDT based on vibrations measurements which has been developed by the authors and already tested for analysing damages of many structural elements. The proposed new method is based on the
Random-vibration-based response spectrum method for multi-support structural systems
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ABSTRACT: A random vibration approach for the response analysis of linear multi support structural systems, previously developed by the authors, is briey reviewed. It serves as the basis for the formulation of a response spectrum method for the seismic response analysis
Swimming training repercussion on metabolic and structural bone development; benefits of the incorporation of whole body vibration or pilometric training; the
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Abstract Introduction: Enviromental factors such as exercise participation and nutrition have often been linked to bone improvements. However, not all sports have the same effects, being non-osteogenic sports such as swimming defined as negative or neutral sports to
Structural vibration mode imaging using photorefractive holography
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Abstract: Photorefractive processing of optical interference offers a noncontacting optical method for vibration detection that forms an optical lock-in amplifier. This paper describes the ability of this photorefractive method, when coupled with laser thermoetastic heating,
Impact and Ambient Vibration Testing To Assess Structural Damage In Reinforced Concrete Frames
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ABSTRACT This paper describes the application of ambient and forced vibration tests to detect and characterize signicant damage of a reinforced concrete structure. Forced and ambient vibration tests were performed on ve 0.45 scale reinforced concrete bridge bents
Indirect reconstruction of IC engine pressure trace through structural vibration inverse filtering
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ABSTRACT This paper addresses the feasibility of reconstructing the pressure trace in IC engine from non-intrusive structural vibration measurements, by means of an inverse periodically time-varying filter. Therefore, the deconvolution problem is first formulated in a
Structural Vibration Control Using Artificial Neural Networks
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Abstract Structural control using neural networks is presented. A cost function comprised of control energy and controlled response is defined to train controller neural network. In the model based optimal control, external disturbances and non-linearities cannot be
Multi-walled Carbon Nanotube Film as Strain Sensors for Structural Vibration Control
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ABSTRACT We have studied the possibility of using multi-walled carbon nanotube (MWCNT) film as strain sensors for structural vibration control. The MWCNT films were prepared by solution/filtration method and were bonded directly onto specimens by
ACCELERATED LIQUID MASS DAMPERS AS TOOLS OF STRUCTURAL VIBRATIONCONTROL
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SUMMARY The concept is presented on a new form of mass damper for controlling structural vibration, which utilizes fluid flow in small tube rapidly oscillating in accordance with deformation of the structure. The resisting force of the liquid is formulated on the basis
Nonlinear multi-modal structural/acoustic interaction between a composite plate vibration and the induced pressure
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Abstract This study aims to develop a mixed finite element and classical formulation for the nonlinear multimodal structural acoustic interaction of a composite plate backed by a three dimensional cavity. The formulation is developed by adopting the nonlinear finite element
NONLINEAR 3D BI-AXIAL STRUCTURAL VIBRATION UNDER BI-DIRECTIONAL RANDOM EXCITATION BY TAIL EQUIVALENT LINEARIZATION METHOD
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ABSTRACT In this paper Tail Equivalent Linearization Method has been expanded for 3D structures with biaxial Bouc-Wen material subjected to bi-directional excitation along the structural axes. Most computational part in TELM is to find the design point which is the
Measurement of structural vibration through video images
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Abstract. Structural mechanical vibration is commonly measured through punctual sensors, ie sensors that measure the structural behavior at only one point. Examples of such sensors are accelerometers, LVDTs, non-scanning laser vibrometers, and proximity probes. This
Structural Vibration Analysis of Electronic Equipment for Satellite under Launch Environment
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StructuralVibration Analysis of Electronic Equipment for Satellite under Launch Environment Structural vibration analysis of PCBs and their electronic components can be performed using either FEM or a vibration test.
ADAPTIVE FEEDFORWARD COMPENSATION OF STRUCTURAL VIBRATION IN SATELLITE-BASED LASER COMMUNICATION SYSTEMS
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Abstract. A technique, resulting in the significant reduction of negative effects of platform vibration on the beam positioning accuracy of satellite-or aircraft-based laser communication systems, is presented. It implies vibration monitoring and self-tuning feedforward
Experimental estimation of effective mass for structural dynamics and vibrationapplications
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rigid body matrix The effective mass concept, introduced in the early seventies, is of prime importance for dynamic studies related to base excitation and modal reaction force. Traditionally, two key roles of the effective mass have been (1) for definition
Structural Vibration Analysis of Large-scale Wind Turbines Considering Periodically Time-Varying Parameters
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1Abstract:Dynamics of the wind turbine, which is a rotor system possessing a number of rotor blades, is characterized by a set of linear differential equations with periodically time- varying parameters. And the periodic terms in the equation-of-motion leads to difficulties in
Structural vibration transmission in stiffened structures
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ABSTRACT Plates and shells with beam stiffeners are common structural elements in ships, aircraft and land vehicles. Several approaches can be used to model the dynamics of these elements. One is to smear the mass and stiffness of the beam stiffeners to give an With the recent interest in environmental issues, noise and vibration problems have been a subject of intense interest for many years in modern industrial societies. Various control techniques, such as passive, active, or a combination of the two control techniques (hybrid
Statistically Efficient and Computationally Efficient Identification of Structural Parameters from Random Vibration Records
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SYNOPSIS A new statistically efficient and computationally efficient maximum likelihood computational procedure for determining the period and damping values of linear mu degree-of-freedom structures and estimates of their statistical reliability from records of
A study on the low vibration design of 4,100 TEU container carrier superstructure using thestructural intensity analysis
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Abstract The structural intensity analysis, which calculates vibration energy flow from vibratory velocity and internal force of structures, can give information on source power, dominant transmission path and dissipation of vibration energy. In this study, the structural
Validation of 3D Finite Element Models through Seismic Tests at the ENEA StructuralDynamic and Vibration Control Laboratory
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A general approach to evaluate the seismic behaviour of structures by finite element analyses (FEA) and shaking table experiments is shown in this poster. The research activities at the FIM-
Structural identification from environmental vibration testing of an asymmetric-plan hospital building in Italy
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ABSTRACT: The structural identification from environmental vibration testing of a hospital building inwas presented. The comparison of the results enables to verify and calibrate numerical predictions on the base of data obtained from modal
New sensor for measuring tracking accuracy, tracker vibration, and structural deflection
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Abstract. In this paper we describe the development and measurement results of a high accuracy sensor which is able to examine the precision of tracNing systems in relation to the sun. Such tracNers are used in many concentrator photovoltaic (CPV) applications.
Structural health monitoring with a wireless vibration sensor network
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Abstract Advanced maintenance strategies for infrastructure assets such as bridges or off shore wind turbines require actual and reliable information of the maintenance status. Structural health monitoring based on vibration sensing can help in supplying the input
Vibration Control using Frequency Dependent Viscoelastic Structural Elements
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ABSTRACT The effective control of vibration is essential in remote sensing applications to achieve the needed resolution to observe features on Earth from a space platform. A passive system that has the ability to effectively reduce the response of a structure due to base
A Gaussian model for predicting the effect of unsteady windspeed on the vortex-inducedvibration response of structural members
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ABSTRACT In a previous study [1] the authors have shown that the expected duration of visit by the windspeed to the critical velocity interval of a structural member is an important time scale in determining the ultimate fatigue damage of the member due to vortex-induced
Dynamo software for vibration based Structural Health Monitoring
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ABSTRACT: This paper presents an innovative software for continuous dynamic monitoring of civil infrastructures. The followed approach is based in the continuous on-line automatic identification of the structure modal parameters, using its response under operation and
Using a vibration absorber to reduce vibratory screen structural loading [C]
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ABSTRACT Vibratory screens are subject to high levels of acceleration and often impart significant dynamic loads on plant buildings, especially in cases where more than one of these screens are employed in process applications. To avoid premature failure and
Experimental assessmen of vibration-based time series methods for structural health monitoring
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ABSTRACT This work aims at the experimental assessment of vibration based time series methods for Structural Health Monitoring (SHM). The methods are classified as non parametric and parametric, while their features and operation are discussed. Furthermore,
Threshold changes in building frequencies of vibration associated with structural damage study of full-scale observations in the Borik-2building in the former
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ABSTRACT: A critical issue that has to be addressed before structural health monitoring systems can be implemented for real time earthquake damage detection and early warning is that the damage sensitive features may vary due to factors other than earthquake
Random vibration analysis of non-classically damped multi-support structural systems
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ABSTRACT A random vibration methodology is formulated for the seismic response analysis of multi-support structural systems with non-classical damping. Using Foss's method to obtain the complex modal frequencies and shapes, it is shown that a dynamic response
Numerical Analysis Vibration Study of Isotropic Hyper Composite Plate Structural
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ABSTRACT In this work, a suggested analytical solution for dynamic analysis of hyper composite plate combined from two reinforcement finer, mat and powder or short and powder reinforcement fiber, with resin matrix, as polyester or epoxy resin, is presented.
Vibration-powered sensor harvests structural shakes, stores data for later readout
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In a project initiatedArchitectural Suretyprogram, Labs researchers have demonstrated the key components of a self-contained microsensor system that powers itself by converting mechanical energy from the subtle vibrations of structures into electrical
Structural damage identification from measured vibration modal data
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SUMMARY A novel non-linear perturbation theory based on the characteristic equations for structural dynamic systems is developed, which can provide an exact relationship between the perturbation of structural parameters and the perturbation of modal parameters. Then,
The performance of active control of sound and vibration in a fully-coupled structural-acoustic system using different reference sensors
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Abstract The increasing demand for automotive refinement and improved audio quality in cars motivates the need for better techniques to reduce random road noise. One approach that shows promise for substantial reduction of low frequency road noise is active control,
Structural and functional requirements imposed to vibration insulator systems
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ABSTRACT This work presents the essential requirements concerning both the structure and the behavior of vibration insulator systems by introducing the performance concept. Thus, some of the constructive solutions useful for vibration insulation in case of stationary
Vibration Measurement of Wireless Sensor Nodes for Structural Health Monitoring
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Abstract. Low-cost wireless sensor nodes have become more important in the area of modern structural health monitoring (SHM) because the power consumption and cost of the wireless sensor nodes play an important role in the development of modern SHM. This
Stationary or Non-Stationary Random Excitation for Vibration-Based Structural Damage Detection An exploratory study
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Abstract In many vibration-based structural damage detection cases where the excitation is user specified, stationary random signals (typically white noise) are chosen as excitation. The question explored in this study is whether or not the use of non-stationary random
An investigation of model validation and updating of existing structure for vibration-basedstructural change identification
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Abstract In this study, model validation and updating for vibration-based structural change identification was investigated with an existing pile supported four-storey reinforced concrete building undergoing major renovation. Seven different renovation stages, which
Realization and Testing of an In-Service Vibration Analysis System for Structural Health Monitoring
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ABSTRACT Large lightweight structures like bridges are susceptible to vibrations due to operational and environmental loads. Since the excitation of structural resonances can effect in high vibration levels and in turn to fatigue damages, structural analyses are conducted ABSTRACT This paper presents an analysis of the coupled vibration of asymmetric core structures in tall buildings. The governing equation of free vibration and its corresponding eigenvalue problem, which is a set of equations for laterally flexural vibrations in two
Structural Monitoring Test For An Aged Large Arch Dam Based On Ambient VibrationMeasurement
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SUMMARY The long-term continuous ambient vibration test has been conducted at two aged large arch dams for 5 years. We have already presented the results on the first 1 year monitoring conducted at Hitotsuse arch dam [1]. These results show that the seasonal
Structural dynamic monitoring under ambient vibration
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ABSTRACT: Vibration measurements on bridges are not recent and the LCPC and many French or foreign agencies or companies carried out many studies in the past. What is new today, it is the increase of the number of dynamic tests carried out on bridges for a better
Structural identification and vibration problems in buildings with dome roofs
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ABSTRACT Architectural dome roofs have traditionally been used to cover buildings with large areas, thus bringing to each of them a unique and aesthetically pleasing feature. This paper includes the most important findings of a series of instrumental investigations
Low frequency vibration approach to assess the performance of wood structural systems
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ABSTRACT. The primary means of inspecting buildings and other structures is to evaluate each structure member individually. This is a time consuming process that is expensive, particularly if sheathing or other covering materials must be removed to access the
Comparison of System Identification Techniques with Field Vibration Data for StructuralHealth Monitoring of Bridges
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Abstract Modal analysis together with finite element method (FEM) has evolved as a key technology in dynamic characterization of structures. The traditional modal analysis, known as Experimental Modal Analysis (EMA), identifies a modal model from the measured input
Utilizing ABAQUS to Analyze the Active Vibration Suppression of Structural Systems
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Abstract: ABAQUS can be utilized in the numerical simulation of active feedback control for the purpose of vibration suppression of structural systems. Using the example of active control of a cantilever beam, the Positive Position Feedback (PPF) control algorithm is
Vibration-based Structural Health Monitoring of composite structures
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Abstract: Vibration-based Structural Health Monitoring (SHM) is a method to assess damage in structures, working in the principle that variations on the stiffness, mass or energy dissipation properties of the structure will alter its dynamic response (eg, mode shapes
Identification of structural damage based on vibration responses
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SUMMARY A technique for detecting damage to structures is proposed that uses FRF data generated by the harmonic excitation force. It is based on the fact that structural damage usually causes a decrease in structural stiffness and an increase in structural damping,
3D Finite Element Modeling and Vibration Analysis of Gas Turbine Structural Elements
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Abstract This paper is dedicated to the topical problem of vibration reliability of gas turbine units. One of the most urgent problems during design and manufacturing of gas turbine units is the provision of reliability and durability of unit's joints by development and application
Structural Integrity Assessment of Plates using Vibration Monitoring: Theory and Simulation
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Abstract Theoretical approaches to application of frequency based vibration methods for damage detection have hitherto been restricted to one-dimensional structures. In this paper,
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