| NUMERICAL SIMULATION OF COUPLED STRUCTURAL- ACOUSTIC PROBLEMS USING FEM/IBEM |
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| 作者姓名： | 徐张明 沈荣瀛 华宏星 |
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| 作者单位： | State Key Lab. of Vibration，Shock & Noise，Shanghai Jiaotong Univ.，Shanghai 200030，China |
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| 摘 要： | Introduction Numerical implementation of a coupling vibro-acoustic algorithm for the immersed elastic modelis a key problem.A thin shell interacting with itsexterior is one typical example of osciallatory be-havior.It is improtant therefore to identify thecoupled vibro- acoustic behavior in order to adjustthe vibro- acousticdesign of the interacting system.Some researchers adopted the finite elementmethod to study the coupling system,but theacoustic fluid region is limited in the near field…
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NUMERICAL SIMULATION OF COUPLED STRUCTURAL- ACOUSTIC PROBLEMS USING FEM/IBEM |
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| XU Zhang ming,SHEN Rong ying,HUA Hong xing.NUMERICAL SIMULATION OF COUPLED STRUCTURAL- ACOUSTIC PROBLEMS USING FEM/IBEM[J].Journal of Shanghai Jiaotong university,2002,7(2):162-165. |
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| Authors: | XU Zhang ming SHEN Rong ying HUA Hong xing |
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| Institution: | State Key Lab. of Vibration, Shock & Noise, Shanghai Jiaotong Univ., Shanghai 200030, China |
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| Abstract: | The numerical method of a coupled finite element and indirect boundary element equation for computing both the structural vibration and the acoustic radiation was presented. The coupling matrices were discussed and physical degrees of freedom of the structure were treated in terms of its modal basis in vacuum to decouple the computation from the entire coupled structural acoustic equations. The numerical results for the ellipsoidal shell immersed in two different fluids indicate that heavy fluid changes greatly structural and acoustic behavior. This method can be applied to analyze acoustic and vibration for arbitrary complex structures in fluids. |
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| Keywords: | indirect boundary method finite element method acoustic radiation coupled structural acoustic |
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