1st Edition

Acoustic Analyses Using Matlab® and Ansys®

By Carl Howard, Benjamin Cazzolato Copyright 2015
    708 Pages 203 B/W Illustrations
    by CRC Press

    708 Pages 203 B/W Illustrations
    by CRC Press

    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.


    About This Book

    A Philosophy for Finite Element Modelling

    Analysis Types


    Learning Outcomes


    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


    Learning Outcomes


    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



    Introduction to Damped Acoustic Systems

    Learning Outcomes


    General Discussion of Damping of Vibro-Acoustic Systems in ANSYS


    Example: 2D Impedance Tube with a Real Admittance

    Example: 2D Impedance Tube with a Complex Termination


    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


    Description of the System


    Example - Locally Reacting Liner

    Example - Bulk Reacting Liner

    Room Acoustics

    Learning Outcomes

    Description of the System


    Example: Reverberation Room

    Radiation and Scattering

    Learning Outcomes

    Wave Absorbing Conditions

    Example: Directivity of Acoustic Wave Sources

    Example: Radiation of a Baffled Piston


    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




    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.

    "… 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