Analysis on acoustical scattering by a cracked elastic structure
Other Titles
含裂紋彈性結構對聲散射作用研究
Author(s)
Author(s)
Zhong, W.
Wu, Y.
Wu, G.
Date Issued
2003
Publisher
Springer
Journal
Acta Mechanica Solida Sinica
Volume
16
Issue
3
Start page
262
End page
268
Abstract
The acoustical scattering by a cracked elastic structure is studied. The mixed method of boundary element and fractal finite element is adopted to solve the cracked structure-acoustic coupling problem. The fractal two-level finite element method is employed for the cracked structure, which can reduce the degree of freedoms (DOFs) greatly, and the boundary element method is used for the exterior acoustic field which can automatically satisfy Sommerfelds radiation condition. Numerical examples show that the resonance frequency is lower with the cracks depth increase, and that the effect on the acoustical field by the crack is particularly pronounced in the vicinity of the crack tip. This mixed method of boundary element and finite element is effective in solving the scattering problem by a cracked structure.
SFU Affiliated Publication
No
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