Meshless analysis for three-dimensional elasticity with singular hybrid boundary node method

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• 作者：Yu Miao and Yuan-han Wang
• 关键词：three ; dimensional elasticity ; moving least squares ; meshless method ; modified variational principle ; singular hybrid boundary node method
• 刊名：Applied Mathematics and Mechanics
• 出版年：2006
• 出版时间：May, 2006
• 年：2006
• 卷：27
• 期：5
• 页码：673-681
• 全文大小：243 KB

文摘

The singular hybrid boundary node method (SHBNM) is proposed for solving three-dimensional problems in linear elasticity. The SHBNM represents a coupling between the hybrid displacement variational formulations and moving least squares (MLS) approximation. The main idea is to reduce the dimensionality of the former and keep the meshless advantage of the later. The rigid movement method was employed to solve the hyper-singular integrations. The ‘boundary layer effect’, which is the main drawback of the original Hybrid BNM, was overcome by an adaptive integration scheme. The source points of the fundamental solution were arranged directly on the boundary. Thus the uncertain scale factor taken in the regular hybrid boundary node method (RHBNM) can be avoided. Numerical examples for some 3D elastic problems were given to show the characteristics. The computation results obtained by the present method are in excellent agreement with the analytical solution. The parameters that influence the performance of this method were studied through the numerical examples.