Designing quiet structures : a sound power minimization approach
This book is the first of its kind.It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design stages of a machine or structure.The unique and unified methodology builds upon the familiar disciplines of acoustics, structural dynamics and...
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| Main Authors | , |
|---|---|
| Format | eBook Book |
| Language | English |
| Published |
San Diego ; Tokyo
Academic Press
1997
Elsevier Science & Technology |
| Edition | 1 |
| Subjects | |
| Online Access | Get full text |
| ISBN | 0124192459 9780124192454 |
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| Abstract | This book is the first of its kind.It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design stages of a machine or structure.The unique and unified methodology builds upon the familiar disciplines of acoustics, structural dynamics and optimization. |
|---|---|
| AbstractList | This book is the first of its kind.It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design stages of a machine or structure.The unique and unified methodology builds upon the familiar disciplines of acoustics, structural dynamics and optimization. This book is the first of its kind. It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design stages of a machine or structure. The unique and unified methodology builds upon the familiar disciplines of acoustics, structural dynamics and optimization. It also exemplifies the art of simplification - the essence of all good engineering design. =Strategies for designing quiet structures require extensive analytical and experimental tools. For computing the sound power from complex structures the authors recommend a new 3-D, lumped parameter formulation. Not only this, they also include, on an accompanying companion website, an original numerical program POWER. This fully developed, user-friendly program can be applied generally to noise-control-by-design problems. Detailed instructions for running the application are given in the appendix as well as several sample problems to help the user get started. =The authors also describe a new instrument: a specially developed resistance probe used to measure a structure=92s acoustic surface resistance. As an example, the procedure is outlined for measuring the valve cover of an internal combustion engine. Indeed, throughout the book the reader is presented with actual experiments, numerical and physical that they can replicate in their own laboratory.This is a must-have book for engineers working in industries that include noise control in the design of a product. Its practical and didactic approach also makes it ideally suited to graduate students. Key Features* First text covering the design of quiet structures* Written by two of the leading experts in the world in the area of noise control* Strong in its integration of structural dynamics, acoustics, and optimization theory* Accompanied by a computer program that allows the computation of sound power* Presents numerous applications of noise-control-by-design methods as well as methods for enclosed and open spaces* Each chapter is supported by homework problems and demonstration experiments |
| Author | Fahnline, John B. Koopmann, Gary H. |
| Author_xml | – sequence: 1 fullname: Koopmann, Gary H. – sequence: 2 fullname: Fahnline, John B. |
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| EISBN | 9780080504049 0080504043 |
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| ISBN | 0124192459 9780124192454 |
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| Notes | Includes bibliographical references and index Includes 3 1/2" computer disk in pocket attached to inside back cover |
| OCLC | 476102772 |
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| PublicationPlace | San Diego ; Tokyo |
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| Snippet | This book is the first of its kind.It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design... This book is the first of its kind. It provides the reader with a logical and highly quantitative means of including noise as a parameter in the early design... |
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| SubjectTerms | Acoustical engineering Noise control Structural engineering |
| TableOfContents | Front Cover -- DESIGNING QUIET STRUCTURES: A Sound Power Minimization Approach -- Copyright Page -- CONTENTS -- PREFACE -- ACKNOWLEDGMENTS -- CHAPTER 1. BASIC EQUATIONS OF ACOUSTICS -- 1.1 Derivation of the Wave Equation -- 1.2 The Helmholtz Equation for Time-Harmonic Vibrations -- 1.3 Boundary Conditions for Acoustic Boundary Value Problems -- 1.4 The Time-Averaged Acoustic Power Output of a Vibrating Structure -- 1.5 The Inhomogeneous Form of the Helmholtz Equation and Green's Functions -- 1.6 The Free-Space Green's Function -- 1.7 The Kirchhoff-Helmholtz Equation -- 1.8 Sound Radiation from a Very Small Source -- References -- CHAPTER 2. A LUMPED PARAMETER MODEL FOR THE ACOUSTIC RADIATION PROBLEM -- 2.1 Introduction -- 2.2 Basic idea of the lumped parameter model -- 2.3 Example of a Radially and Transversely Oscillating Sphere -- 2.4 Integral Solution for the Acoustic Field of a Vibrating Structure Using the Free-Space Green's Function -- 2.5 Integral Solution for the Acoustic Field of a Vibrating Structure Using the Green's Function of the Second Kind -- 2.6 Lumped Parameter Model for the Acoustic Field of a Vibrating Structure -- 2.7 Lumped Parameter Model for the Acoustic Power Output -- 2.8 Characterizing the Error in the Lumped Parameter Approximation -- 2.9 Convergence of the Lumped Parameter Model as a Function of Element Size -- References -- Laboratory Exercise: Radiation From Monopole and Dipole Sources at Low Frequencies -- CHAPTER 3. NUMERICAL SOLUTION OF THE ACOUSTIC RADIATION PROBLEM -- 3.1 General Methods for Approximately Satisfying the Boundary Condition -- 3.2 Conversion of Structural Displacements to Elemental Volume Velocities -- 3.3 Radiation from Different Types of Structural Components -- 3.4 Implementation of the Volume Velocity Matching Scheme -- 3.5 Computing Acoustic Power Output 3.6 Calculation of the Resistance Matrix -- 3.7 Numerical Example Problems -- References -- Laboratory Exercise: Compiling and Running the Program POWER for an Example Problem -- CHAPTER 4. EXPERIMENTAL MEASUREMENT OF THE RESISTANCE MATRIX -- 4.1 The Resistance Probe -- 4.2 Measurement of the Resistance Matrix -- 4.3 Example Problems -- References -- Laboratory Exercise #1: Calibration of an Acoustic Surface Resistance Probe -- Laboratory Exercise # 2: Surface Resistance Measurements on Simple Geometric Shapes -- Laboratory Exercise # 3: Comparison of Experimental Predictions to Numerical Calcu- lations -- CHAPTER 5. POWER OUTPUT COMPUTATIONS USING THE RESISTANCE MATRIX -- 5.1 Frequency Dependence of the Resistance Matrix -- 5.2 Radiation Efficiency of Vibrational Mode Shapes -- References -- Problems -- Laboratory Exercise #1: Measurement of the Surface Velocity Profile of a Vibrating Structure -- Laboratory Exercise #2: Computation of the Acoustic Power Output -- Laboratory Exercise #3: Measurement of the Acoustic Power Output (optional) -- CHAPTER 6. MINIMIZING SOUND POWER USING MATERIAL TAILORING -- 6.1 Defining the Objective Function, Design Parameters and Constraints -- 6.2 Analytical Sensitivities for Optimization -- 6.3 Reduction in the Sound Power of a Simply Supported, Baffled Beam Using Masses -- 6.4 Reducing the Radiation Efficiency of the Structural Resonances of a Plate -- References -- Problems -- Laboratory Exercise #1: Reducing the Radiation Efficiency of a Structural Resonance of a Plate -- CHAPTER 7. ACTIVE CONTROL OF RADIATED ACOUSTIC POWER -- 7.1 Optimum Solution for the Control Source Amplitudes -- 7.2 Numerical Example Problems -- 7.3 Elemental Volume Velocity Control -- 7.4 More Realistic Simulation of Active Control -- References -- Problems Laboratory Exercise #1: Optimization Techniques for Reducing Acoustic Sound Power Via Active Control -- CHAPTER 8. CHARACTERIZING AND CONTROLLING SOUND IN AN ENCLOSURE -- 8.1 Calculating the Acoustic Potential Energy in an Enclosure -- 8.2 Rewriting the Potential Energy in Terms of Elemental Volume Velocities -- 8.3 Actively Controlling the Acoustic Potential Energy in an Enclosure -- 8.4 Numerical Example Problem -- References -- Problems -- Laboratory Exercise #1: Numerical Simulation of Active Control in an Enclosure -- Laboratory Exercise #2: Experimental Validation of the Predicted Reductions in the Potential Energy -- APPENDIX USING THE COMPUTER PROGRAMS -- A. 1 Input to the Program VV -- A.2 Output from the Program VV -- A.3 Input to the Program POWER -- A.4 Output from the Program POWER -- A.5 Discussion of the Computer Program POWER -- References -- INDEX -- WARNING |
| Title | Designing quiet structures : a sound power minimization approach |
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