A hybrid cell-based smoothing point interpolation method for solving structural-acoustic problems

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (8) : 238-245.

CHEN Zecong1, CHEN Yuzhen2, HE Zhicheng3, ZHANG Guiyong1,4,5, WANG Haiying6

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Abstract

The structural-acoustic models based on finite element method (FEM) suffer from considerable dispersion error in relatively high frequencies due to their “overly-stiff” property.In order to improve the accuracy of simulation, a hybrid cell-based smoothed point interpolation method (CSαPIM) with gradient smoothing technique (GST) was applied to cope with three-dimensional acoustic problems.Modal analysis and frequency response analysis were conducted using a structural-acoustic model, which was constructed by combining CSαPIM for acoustic domain with the edge-based smoothed finite element method (ESFEM) for a two-dimensional plate.It was shown that the present model can provide more accurate results owing to the ability of softening the stiffness effectively.Besides, as linear triangular and tetrahedral elements have been used for the discretization of structure and acoustic domains respectively, the mesh of the problem can be generated automatically for complicated geometries with much less pre-processing time.Therefore, the present method is promising. 

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CHEN Zecong1, CHEN Yuzhen2, HE Zhicheng3, ZHANG Guiyong1,4,5, WANG Haiying6. A hybrid cell-based smoothing point interpolation method for solving structural-acoustic problems[J]. Journal of Vibration and Shock, 2019, 38(8): 238-245

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