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A coupled smoothed finite element method (S-FEM) for structural-acoustic analysis of shells

机译：壳结构声学分析的耦合平滑有限元方法（S-FEM）

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摘要

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, PR China. In this paper, a coupled smoothed finite element method (S-FEM) is developed to deal with the structural-acoustic problems consisting of a shell configuration interacting with the fluid medium. Three-node triangular elements and four-node tetrahedral elements that can be generated automatically for any complicated geometries are adopted to discretize the problem domain. A gradient smoothing technique (GST) is introduced to perform the strain smoothing operation. The discretized system equations are obtained using the smoothed Galerkin weakform, and the numerical integration is applied over the further formed edge-based and face-based smoothing domains, respectively. To extend the edge-based smoothing operation from plate structure to shell structure, an edge coordinate system is defined local on the edges of the triangular element Numerical examples of a cylinder cavity attached to a flexible shell and an automobile passenger compartment have been conducted to illustrate the effectiveness and accuracy of the coupled S-FEM for structural-acoustic problems.
机译：湖南大学车身先进设计与制造国家重点实验室，长沙410082在本文中，开发了一种耦合平滑有限元方法（S-FEM），以处理结构声学问题，该问题包括壳结构与流体介质相互作用。可以针对任何复杂的几何形状自动生成的三节点三角单元和四节点四面体单元将问题域离散化。引入了梯度平滑技术（GST）以执行应变平滑操作。使用平滑的Galerkin弱形式获得离散的系统方程，并将数值积分分别应用于进一步形成的基于边缘和基于面部的平滑域。为了将基于边缘的平滑操作从板结构扩展到壳体结构，在三角形元素的边缘局部定义了边缘坐标系。已对连接到柔性壳体和汽车乘客车厢的缸腔进行了数值示例，以说明耦合S-FEM对结构声学问题的有效性和准确性。

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  • 来源
    《Engineering analysis with boundary elements》 |2015年第12期|207-217|共11页
  • 作者

    G. Wang; X.Y. Cui; Z.M. Liang; G.Y. Li;

  • 作者单位

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, PR China,Joint Center for Intelligent New Energy Vehicle, Shanghai 201804, PR China;

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, PR China,Joint Center for Intelligent New Energy Vehicle, Shanghai 201804, PR China;

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, PR China,Joint Center for Intelligent New Energy Vehicle, Shanghai 201804, PR China;

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, PR China,Joint Center for Intelligent New Energy Vehicle, Shanghai 201804, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Shell structure; Acoustic analysis; Structural-acoustic interaction; Smoothed finite element method (S-FEM); Numerical methods; Meshfree methods;

    机译：外壳结构;声学分析;结构声学相互作用;平滑有限元法（S-FEM）;数值方法;无网格方法;

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