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Cylindrical shell surface vibrations and radiated sound field reconstruction forecasts modal analysis method

Author: Shuo
Tutor: LiZuo
School: Harbin Engineering University
Course: Underwater Acoustics
Keywords: Modal Analysis Sound field reconstruction Radiation modes Cylindrical shell
CLC: TB535
Type: Master's thesis
Year: 2010
Downloads: 64
Quote: 0
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Abstract


Sound field reconstruction inverse problem belongs to acoustic radiation , can be seen by measuring the sound field in a finite number of points of information to thrusting the entire sound field situation. Currently, there are many ways to carry out sound field reconstruction work, such as boundary element , wave superposition and other methods , and achieved good results. However, these methods in the face of the sound source structure is more complex situations , you need to gather more information, do not facilitate practical application. Therefore, seeking a quick and can effectively shorten the test time is of practical significance . In this paper , by using acoustic radiation modal analysis method related theory, modal analysis techniques used in the study of sound field reconstruction . According to papers need to build a variety of different structural simulation model of sound sources , including : swing the ball, quadrupole sound source , a rectangular plate and, most importantly cylindrical sound source . Modal analysis using the relevant theoretical knowledge , these sound source models were solving acoustic radiation modes and radiated sound field reconstruction . And use a single cylindrical shell model theory papers verification experiment . Through the processing and analysis of experimental data obtained more satisfactory results . Experimental results show that the acoustic radiation modal analysis techniques to reduce the time used in the experiment , with some feasibility and practicality.

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use
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