华南理工大学学报(自然科学版) ›› 2010, Vol. 38 ›› Issue (6): 140-145.doi: 10.3969/j.issn.1000-565X.2010.06.026

• 机械工程 • 上一篇    下一篇

混合元法及其在本质边界条件处理中的应用

张祖军 阮锋 张赛军   

  1. 华南理工大学 机械与汽车工程学院, 广东 广州 510640
  • 收稿日期:2009-09-23 修回日期:2009-10-14 出版日期:2010-06-25 发布日期:2010-06-25
  • 通信作者: 张祖军(1980-),男,博士生,主要从事模塑成型及其计算机技术研究. E-mail:xz800110@yahoo.cn
  • 作者简介:张祖军(1980-),男,博士生,主要从事模塑成型及其计算机技术研究.
  • 基金资助:

    广东省教育部产学研结合计划项目(2007A090302028)

Hybrid Element Method and Its Application to Processing of Essential Boundary Condition

Zhang Zu-jun  Ruan Feng  Zhang Sai-jun   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-09-23 Revised:2009-10-14 Online:2010-06-25 Published:2010-06-25
  • Contact: 张祖军(1980-),男,博士生,主要从事模塑成型及其计算机技术研究. E-mail:xz800110@yahoo.cn
  • About author:张祖军(1980-),男,博士生,主要从事模塑成型及其计算机技术研究.
  • Supported by:

    广东省教育部产学研结合计划项目(2007A090302028)

摘要: 为了解决无网格Galerkin(EFG)方法中本质边界条件的施加问题,提出了一种耦合径向基点插值无网格(RPIM)方法与EFG方法的混合元法.该方法将问题域分成两部分,在包含本质边界部分采用RPIM方法处理,其余部分采用EFG方法,然后利用两种无网格插值方法之间的关系进行耦合.数值算例结果表明:文中方法在简明有效地处理本质边界条件的同时,具有与EFG方法相当的计算精度,且易于编程计算.

关键词: 无网格法, 耦合, 混合元法, 本质边界条件

Abstract:

In order to rationally impose essential boundary conditions in the element-free Galerkin(EFG) method,a hybrid element method coupling the radial point interpolation method(RPIM) and the EFG method is proposed.In this method,the problem domain is divided into two parts: one contains the essential boundary and is solved by the RPIM,and the other is solved by the EFG method;and,a coupling is performed according to the relationship between the two above-mentioned element-free interpolation methods.Numerical examples indicate that the proposed method is easy to program,and that it can concisely and effectively process the essential boundary condition,with a computation accuracy as high as that of the EFG method.

Key words: element-free method, coupling, hybrid element method, essential boundary condition