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An isogeometric finite element-boundary element approach for the vibration analysis of submerged thin-walled structures

机译:浸没薄壁结构振动分析的异步有限元边界元接近

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In this paper, the isogeometric formulations of the finite element and boundary element methods are applied to the dynamic analysis of thin-walled structures submerged in an infinite, inviscid, and incompressible fluid medium. This fluid-structure interaction problem is decoupled using the modal analysis technique, and the fluid effect on the structure is taken into account through the generalized added mass matrix. The structure is modeled with NURBS-based Kirchhoff-Love shell elements. The fluid response is computed using a regularized boundary integral equation. We take advantage of the geometry preserving property of the NURBS refinement techniques to reduce the computational cost without the need for a projection scheme. The implementation is benchmarked with three test cases, and good accuracy is obtained for a relatively low number of degrees of freedom. (c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
机译:在本文中,有限元和边界元方法的异诊制剂应用于沉积在无限,不可压型和不可压缩的流体介质中的薄壁结构的动态分析。使用模态分析技术解耦该流体结构相互作用问题,通过广义添加的质量基质考虑对结构的流体效应。该结构用基于NURBS的Kirchhoff-Love壳体元素建模。使用正则边界积分方程计算流体响应。我们利用NURBS细化技术的几何保护性能,以降低计算成本,而无需投影方案。该实施采用了三种测试用例基准,获得了良好的自由度的精度。 (c)2021作者。由elsevier有限公司出版。这是CC By-NC-ND许可下的开放式访问文章(http://creativecommons.org/licenses/by-nc-nd/4.0/)。

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