Vibration and Structural Acoustics Analysis: Current Research and Related Technologies

Купить бумажную книгу и читать

Название: The New English Course (Part 1)

Автор: Vasques C.M.A., Rodrigues J.D.

Издательство: Springer Science+Business Media

Год выпуска: 2011

Страниц: 327

Формат: pdf

Качество: отличное

SBN: 978-94-007-1702-2

Язык: английский

Размер: 10 Мб

Differs from other vibration and acoustics related books by addressing current and future challenges in this field organized and compiled into a single volume.

Synergetic combination of efforts of the authors and editors for each research topic presented.

A concise introduction to the field for the less experienced readers is provided along with a deeper and more technically demanding critical analysis and dissemination of the results for both the newcomers and experienced readers.

The underlying technologies of this field of multidisciplinary research are evolving very fast and their dissemination is usually scattered over different and complementary scientific and technical publication means. In order to make it easy for developers and technology end-users to follow the latest developments and news in the field, this book collects into a single volume selected, extended, updated and revised versions of papers presented at the Symposium on Vibration and Structural Acoustics Analysis, coordinated by J. Dias Rodrigues and C. M. A. Vasques, which was organised as part of the 3rd International Conference on Integrity, Reliability & Failure (IRF’2009), co-chaired by J. F. Silva Gomes and Shaker A. Meguid, held at the Faculty of Engineering of the University of Porto, Portugal, 20-24 July 2009.

These papers where chosen from the more than 60 papers presented at the conference symposium.

Written by experienced practitioners and researchers in the field, this book brings together recent developments in the field, spanning across a broad range of themes: vibration analysis, analytical and computational structural acoustics and vibration, material systems and technologies for noise and vibration control, vibration-based structural health monitoring/evaluation, machinery noise/vibration and diagnostics, experimental testing in vibration and structural acoustics, applications and case studies in structural acoustics and vibration. Each chapter presents and describes the state of the art, presents current research results and discusses the need for future developments in a particular aspect of vibration and structural acoustics analysis.

The book is envisaged to be an appealing text for newcomers to the subject and a useful research study tool for advanced students and faculty members. Practitioners and researchers may also find this book a one-stop reference that addresses current and future challenges in this field. The variety of case studies is expected to stimulate a holistic view of sound and vibration and related fields and to appeal to a broad spectrum of engineers such as the ones in the mechanical, aeronautical, aerospace, civil and electrical communities.

Content Level » Research

Keywords » acoustics - vibration

Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity -Mechanical Engineering - Mechanics.

The Dynamic Analysis of Thin Structures Using a Radial Interpolator Meshless Method

L.M.J.S. Dinis, R.M. Natal Jorge, and J. Belinha

Introduction

OverviewoftheStateoftheArt

The Natural Neighbour Radial Point Interpolation Method

Dynamic Discrete System of Equations

Dynamic Examples

Cantilever Beam

ariableCrossSectionBeams

Shear-Wall

Square Plates

Shallow Shell

Prospects for the Future

Summary

SelectedBibliography

References

Vibration Testing for the Evaluation of the Effects of Moisture Content on the In-Plane Elastic Constants ofWood Used in Musical

Instruments

M.A. Pérez Martínez, P. Poletti, and L. Gil Espert

Introduction

OverviewoftheStateoftheArt

Orthotropic Nature of Wood Properties

Influence of Moisture Changes on Wood

Experimental Modal Analysis of Wooden Specimens

Numerical Model of Wooden Plate

TheFiniteElementMethod

Free Vibrations of Kirchhoff Plates

PerturbationoftheEquationofMotion

ElasticConstantsfromPlateVibrationMeasurements

Results

Concluding Remarks

Prospects for the Future

Summary

References

Short-Time Autoregressive (STAR) Modeling for Operational Modal Analysis of Non-stationary Vibration

H. Vu, M. Thomas, A.A. Lakis, and L. Marcouiller

Introduction

Overview of the State of the Art

Operational Modal Analysis

Non-stationary Vibration

Fluid-StructureInteraction

Development of a New Method for Investigating Modal Parameters of Non-stationary Systems by Operational Modal Analysis

VectorAutoregressive(VAR)Modeling

The Short Time Autoregressive (STAR) Method

Order Updating and a Criterion for Minimum Model OrderSelection

Working Procedure

Numerical Simulation on a Mechanical System

Discussion on Data Block Length

Simulation on Mechanical System with Time-Dependent Parameters

Experimental Application on an Emerging Steel Plate

Prospects for the Future

Summary

SelectedBibliography

References

A Numerical and Experimental Analysis for the Active Vibration Control of a Concrete Placing Boom

G. Cazzulani, M. Ferrari, F. Resta, and F. Ripamonti

Introduction

OverviewoftheStateoftheArt

TheSystem

TestRig

Numerical Model

Active Modal Control

Independent Modal Control

The Modal Observer

Numerical Analysis of Modal Control

Feed-Forward Control

The Feed-Forward Control Logic

Numerical Analysis of the Feed-Forward Control

Experimental Testing

Prospects for the Future

Summary

SelectedBibliography

References

Modeling and Testing of a Concrete Pumping Group Control System

C. Ghielmetti, H. Giberti, and F. Resta

Introduction

OverviewoftheStateoftheArt

DescriptionoftheEntireSystem

Experimental Tests

Mathematical Model

OilContinuityEquations

Concrete Continuity Equations

EquationsofMotion

Comparison Between Numerical and Experimental Results

ControlSystemDesign

Prospects for the Future

Summary

SelectedBibliography

References

Vibration Based Structural Health Monitoring and the Modal Strain Energy Damage Index Algorithm Applied to a Composite T-Beam

R. Loendersloot, T.H. Ooijevaar, L. Warnet, A. de Boer, and R. Akkerman

Introduction

OverviewoftheStateoftheArt

VibrationBasedStructuralHealthMonitoring

Modal Strain Energy Damage Index Algorithm

T-Beam with T-Joint Stiffener

Theory of the Modal Strain Energy Damage Index Algorithm

Finite Element Model

Experimental Analysis of the T-Beam

ResultsandDiscussion

Validation of Numerical Model

Length and Starting Point of Delamination

Position of Evaluation Points

NumberofEvaluationPoints

Incorporation of Torsion Modes

Prospects for the Future

Summary

SelectedBibliography

References

An Efficient Sound Source Localization Technique via Boundary Element Method

A. Seçgin and A.S. Sarıgül

Introduction

OverviewoftheStateoftheArt

Helmholtz Integral Equation and Boundary Element Method

Full-Space Case

Half-Space Case

Theoretical Examples: Sound Field Determination

Case Study: Sound Source Localization

SurfaceVelocityMeasurements

Boundary Element Operations

Sound Source Identification and Characterization

Prospects for the Future

Summary

SelectedBibliography

Appendix A

Appendix B

References

Dispersion Analysis of Acoustic Circumferential Waves Using Time-Frequency Representations

R. Latif, M. Laaboubi, E.H. Aassif, and G. Maze

Introduction

OverviewoftheStateoftheArt

Time-Frequency Representations

Wigner-Ville Distribution

Spectrogram Distribution

Reassignment Spectrogram

Acoustic Measured Signal Backscattered by an Elastic Tube

Experimental Setup

Measured Acoustic Response

Resonance Spectrum

Time-Frequency Images of Experimental Acoustic Signal

Spectrogram and Wigner-Ville Images

Reassigned Spectrogram Image

DispersionoftheCircumferentialWaves

Determination of Dispersion Curves of Circumferential Waves by the Theoretical Method

Determination of Dispersion Curves of Circumferential Waves by the Reassigned Spectrogram Image

Prospects for the Future

Summary

SelectedBibliography

References

Viscoelastic Damping Technologies: Finite Element Modeling and Application to Circular Saw Blades

C.M.A. Vasques and L.C. Cardoso

Introduction

OverviewoftheStateoftheArt

Configurations of Viscoelastic Damping Treatments

Viscoelastic Constitutive Behavior

Finite Element Modeling of Viscoelastic Structural Systems

Some Comments on Deformation Theories

SpatialModelingandMeshing

Damping Modeling and Solution Approaches

Frequency- and Time-Domain Implementations

CommercialFESoftware

broacoustic Simulation and Analysis

Circular Saw Blades Damping: Modeling, Analysis and Design

Geometric and Material Properties of the Saw

FE Modeling and Vibroacoustic Media Discretization

Results

Prospects for the Future

Summary

References

Vibroacoustic Energy Diffusion Optimization in Beams and Plates by Means of Distributed Shunted Piezoelectric Patches

M. Collet, M. Ouisse, K.A. Cunefare, M. Ruzzene, B. Beck, L. Airoldi, and F. Casadei

Introduction

OverviewoftheStateoftheArt

Classical Tools for Designing RL and RCneg Shunt Circuits

Piezoelectric Modeling and Shunt Circuit Design

Controlling the Dispersion in Beams and Plates

Waves Dispersion Control by Using RL and Negative Capacitance Shunts on Periodically Distributed Piezoelectric Patches

Periodically Distributed Shunted Piezoelectric Patches for Controlling Structure Borne Noise

OptimizingWave’sDiffusioninBeam

Description and Modeling of a Periodic Beam System

Optimization of Power Flow Diffusion by Negative Capacitance Shunt Circuits

Optimization of Wave Reflection and Transmission

Prospects for the Future

Summary

References

Identification of Reduced Models from Optimal Complex Eigenvectors in Structural Dynamics and Vibroacoustics

M. Ouisse and E. Foltête

Introduction

OverviewoftheStateoftheArt

Properness Condition in Structural Dynamics

Properness of Complex Modes

llustration of Properness Impact on Inverse Procedure

Properness Enforcement

Experimental Illustration

Extension of Properness to Vibroacoustics

EquationsofMotion

Complex Modes for Vibroacoustics

Properness for Vibroacoustics

Methodologies for Properness Enforcement

NumericalIllustration

Experimental Test-Case

Prospects for the Future

Summary

SelectedBibliography

References

СКАЧАТЬ