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Research on Fast Predicting Method of Sound and Vibration from a Finite Cylindrical Shell
Author: ZhaoZhiWei
Tutor: HeYuanAn
School: Harbin Engineering University
Course: Underwater Acoustics
Keywords: Noise prediction Transfer matrix Finite Element Boundary Element
CLC: U666.16
Type: Master's thesis
Year: 2007
Downloads: 260
Quote: 3
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Abstract
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The radiated noise forecast is for effective detection performance of the hull itself , the quick forecast is of great significance this article using the finite element , boundary element , transfer functions such as theoretical modeling and analysis of noise prediction model of the cylindrical shell . Finite cylindrical shell structure is in the form of the typical structure of submarines and other craft cabin . The structure of these aircraft noise from the internal mechanical excitation casing vibration , and promote the development of the surrounding fluid medium vibration of sound radiation , which seriously affect the overall acoustic performance of the underwater vehicle . Finite cylindrical shell study fluid medium in sound refreshing the coupling characteristic has important theoretical and practical significance . The paper to facilitate the practical application of engineering , numerical calculations using the finite element method and boundary element methods , and to exercise their respective functions of the radiated noise prediction analysis . ANSYS parametric design language APDL (ANSYS Parametric Design Language) secondary development of large-scale matrix of the stiffness matrix , mass matrix , within the shell between the transfer matrix stored in the specified database extracted using the transfer matrix method , the vibration of the light housing forecast by the pressure hull vibration using the boundary element technology for fast and effective forecasting radiated noise .
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CLC: > Transportation > Waterway transport > Marine Engineering > Navigation equipment, acoustic equipment > Navigation equipment > Testing technology
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