Acoustic Analyses Using Matlab® and Ansys®  book cover
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1st Edition

Acoustic Analyses Using Matlab® and Ansys®





ISBN 9780429069642
Published December 18, 2014 by CRC Press
708 Pages

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Book Description

This is the first book of its kind that describes the use of ANSYS® finite element analysis (FEA) software, and MATLAB® engineering programming software to solve acoustic problems. It covers simple text book problems, such as determining the natural frequencies of a duct, to progressively more complex problems that can only be solved using FEA software, such as acoustic absorption and fluid-structure-interaction. It also presents benchmark cases that can be used as starting points for analysis. There are practical hints too for using ANSYS software. The material describes how to solve numerous problems theoretically, and how to obtain solutions from the theory using MATLAB engineering software, as well as analyzing the same problem using ANSYS Workbench and ANSYS Mechanical APDL. 

Free downloads are provided on http://www.mecheng.adelaide.edu.au/avc/software, including MATLAB source code, ANSYS APDL models, and ANSYS Workbench models

  • Includes readers’ techniques and tips for new and experienced users of ANSYS software
  • Identifies bugs and deficiencies to help practitioners avoid making mistakes

It can be used as a textbook for graduate students in acoustics, vibration, and related areas in engineering; undergraduates in mechanical and electrical engineering; and as an authoritative reference for industry professionals.

Table of Contents

Introduction

About This Book

A Philosophy for Finite Element Modelling

Analysis Types

Background

Learning Outcomes

Introduction

Pressure Formulated Acoustic Elements

Fluid Structure Interaction

Displacement Formulated Acoustic Elements

Practical Aspects of Modelling Acoustic Systems with FEA

Element Types in ANSYS for Acoustic Analyses

ACT Acoustics Extension

Other Acoustic Loads

Other Measures of Acoustic Energy

Mesh Density

Use of Symmetry

Ducts

Learning Outcomes

Theory

Example of a Circular Duct

Resonator Silencers

Non-Plane Waves

Gas Temperature Variations

Sound Inside a Rigid-Walled Cavity

Learning Outcomes

Description of the System

Theory

Example

Introduction to Damped Acoustic Systems

Learning Outcomes

Introduction

General Discussion of Damping of Vibro-Acoustic Systems in ANSYS

Theory

Example: 2D Impedance Tube with a Real Admittance

Example: 2D Impedance Tube with a Complex Termination

Impedance

Example: 2D Impedance Tube

Example: 3D Impedance Tube

Example: 3D Waveguide with Visco-Thermal Losses

Application of Spectral Damping to a Rigid Walled Cavity

Sound Absorption in a Lined Duct

Learning Outcomes

Definitions

Description of the System

Theory

Example - Locally Reacting Liner

Example - Bulk Reacting Liner

Room Acoustics

Learning Outcomes

Description of the System

Theory

Example: Reverberation Room

Radiation and Scattering

Learning Outcomes

Wave Absorbing Conditions

Example: Directivity of Acoustic Wave Sources

Example: Radiation of a Baffled Piston

Scattering

Example: Scattering from a Cylinder

Fluid Structure Interaction

Learning Outcomes

Fluid Structure Interaction Using ANSYS

FSI Using Modal Coupling

Example: Flexible Plate Attached to an Acoustic Cavity

Example: Transmission Loss of a Simply Supported Panel

A. Files Included With This Book

B. Advice for Using ANSYS

C. MATLAB Functions for Modal Coupling

D. Errors

E. Export of Nodal Area from ANSYS

Bibliography

Index

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Author(s)

Biography

Dr. Carl Howard is a Lecturer at the University of Adelaide. He has been a consultant with Vipac Engineers and Scientists, Worley, and Colin Gordon and Associates, and also worked at United Technologies Research Center.

Dr Ben Cazzolato is an Associate Professor at the University of Adelaide. He has over two decades' experience as an acoustic consultant and academic researcher.

Reviews

"… my students have found the book invaluable for learning how to use ANSYS Workbench for solving vibro-acoustics problems. The examples are numerous, detailed, well-chosen and complete with theoretical solutions. For these reasons and others, I believe ANSYS users will keep a copy of the book nearby and refer to it often."
—Noise Control Engineering Journal, July-August 2015

"A tour de force of quintessential theoretical acoustical topics with an exceptionally coherent crash course in finite element analysis (FEA) software."
—Journal of the Audio Engineering Society

"This book is a must for those wanting to explore and investigate the world of computational engineering acoustics. …Its comprehensive instructional framework supports a conversational, down-to-earth narrative style."
—Andrew Peplow, Noise and vibration specialist, Atlas Copco Rock Drills, Sweden

"These guys know their stuff!! …I thoroughly recommend this book to anyone who is involved in acoustic modelling – it forms the perfect basis for acoustic course work as well as being useful for research and industrial modelling of acoustic devices."
—Ian Bedwell, Thales Australia, Underwater Systems, Technical Consultant