Wave Propagation in A Fluid-Structural Coupled System based on Wave Finite Element Method

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (4) : 204-209.

Guangjian Ni and Jiewei Lin

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Abstract

Wave propagation in a fluid-structural coupled system was presented here using a combined finite element method and wave approach (Wave finite element method). The method is based on the finite element descriptions of the model and solves eigenvalue problem of the model transfer matrix derived from the dynamic stiffness matrix of the model to give eigenvalues and eigenvectors, which determine free wave propagation. Natural frequencies of the separated structure and fluid were calculated first. Wavenumber distributions in a plate strip were calculated using both the wave finite element method and the analytic method showing the model and the method are accurate. Numerical example of wave propagation in the fluid-structural coupled system was then presented. Moreover, the method is not limited to uniform or periodic structure, but can be extended to non-uniform structures with slowly varying properties.

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Guangjian Ni and Jiewei Lin. Wave Propagation in A Fluid-Structural Coupled System based on Wave Finite Element Method[J]. Journal of Vibration and Shock, 2016, 35(4): 204-209

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