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Structural Acoustics

Structural Acoustics

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Course Name

Structural Acoustics

Course Description

This course will describe the fundamental characteristics of sound generated by vibrating structures.  Basic mathematical principles of acoustics and vibrations will be briefly reviewed. The sound generated by elastic plates and shells will then be analyzed.  An introduction to numerical techniques for the solution of fluid-structure interaction problems will conclude the course.  It is intended to provide the fundamental concepts and tools required to study advanced topics in acoustics.

 

Teacher

J.H.Huang

Class Name

Graduate Program of Electro-acoustics

(1st year)

Semester

2

Course Property

Elective

Language of Instruction

Chinese

Credit

3

 

Preparatory Course

Course Name

Important ideas, principles and skills linked to course

Fundamentals of Acoustics

This course provides students basic appreciation of, knowledge of and tools to study acoustic topics, and to understand the latest topics and applications.  

 

Course objectives

·               MATHEMATICAL METHODS: Fourier series, Fourier transform, Integral theorem, Bessel functions, Spherical Bessel functions, Legendre functions, Stationary phase.

·               RESPONSE OF DYNAMIC SYSTEMS: Time harmonic response, Transient response, Time harmonic power flow.

·               ACOUSTIC EQUATIONS: Fundamental equations in acoustics, Euler's and Helmholtz equations, Plane wave solutions, Green’s functions in Cartesian coordinates, Green’s functions in cylindrical coordinates, Green’s functions in spherical coordinates, Arbitrary source distribution, Helmholtz integral equation.

·               SCATTERING FROM HARD AND SOFT STRUCTURES: Planar surface, Spherical surface, Cylindrical surface, Axisymmetric slender body.

·               ELASTICS CONSTITUTIVE EQUATIONS: Strain and stress, Fluid constants, Elastic constants, Anisotropic solids, Thin layered composite.

·               ACOUSTICS OF SPHERICAL SHELL: Equations of motion, Mechanical excitation, Acoustical excitation, Directivity.

·               ACOUSTICS OF THIN PLATE: Equations of motion, Mechanical excitation, Monopole excitation, Plane wave excitation, Transient sound radiation, Directivity.

·               ACOUSTICS OF CYLINDRICAL SHELL: Equations of isotropic shell, Equations of anisotropic shell, Mechanical excitation, Monopole excitation, Plane wave excitation, Periodic Rib Stiffening, Directivity.

·               SPHERICAL LAYERED MEDIA: Mechanical excitation, Acoustical excitation.

·               PLANAR LAYERED MEDIA: Orthotropic elastic layer, Mechanical excitation, Monopole excitation, Plane wave excitation, Transient sound radiation.

Ÿ             CYLINDRICAL LAYERED MEDIA: Orthotropic elastic layer, Mechanical excitation, Monopole excitation, Plane wave excitation.