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Title: 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): Leung, Andrew Yee Tak 
Author(s): Zhong, W.
Wu, Y.
Wu, G.
Issue Date: 2003
Publisher: Springer
Journal: Acta Mechanica Solida Sinica 
Volume: 16
Issue: 3
Start page: 262
End page: 268
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.
CIHE Affiliated Publication: No
Appears in Collections:CIS Publication

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