Abstract
New computational techniques are developed to study fluid-structure interaction problems for elements of the structure. The approach is based on coupled finite and boundary element methods involving hypersingular integral equations. Thin shells and plates are considered as structural elements interacting with ideal and incompressible liquids. The fundamental relations of the continuous mechanics are incorporated to describe the motion of structural elements and fluid. The fluid motion is supposed to be irrotational. The Laplace equation with respect to the liquid pressure on the wetted surfaces of the structural elements is obtained, and the corresponding boundary conditions for unilateral and bilateral contact of the structural element with the liquid are formulated. A hypersingular integral equation is obtained for bilateral contact of the structural element with liquid. The finite element method coupled with the boundary element method for the hypersingular integral equation is implemented to find the fluid pressure on the plate. The frequencies and modes of structure vibrations taking into account the added masses of the liquid are obtained. The accuracy and reliability of the proposed method are ascertained.
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The authors would like to thank our foreign collaborator, Professor Alexander Cheng, University of Mississippi, USA, for his constant support and interest in our research.
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Gnitko, V., Martynenko, O., Vierushkin, I., Kononenko, Y., Degtyarev, K. (2023). Coupled Finite and Boundary Element Methods in Fluid-Structure Interaction Problems for Power Machine Units. In: Altenbach, H., et al. Advances in Mechanical and Power Engineering . CAMPE 2021. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-18487-1_29
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