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	通用有限元系统实现无限域波动仿真方法
	王兵见 ; 刘天云 ; WANG Bing-jian ; LIU Tian-yun
	2010-06-10 ; 2010-06-10
关键词	人工边界 改进的Higdon公式 公式变换 高阶 有限元程序 Msc.Marc absorbing boundary modified Higdon's ABCs equation transformation high order FEA code Msc.Marc O302
其他题名	Simulation of wave problem in unbounded domains by commercial FEA software
中文摘要	在有限元模型中加入人工边界,可以进行无限域波动仿真。本文将介绍一种改进的Higdon人工边界,并通过适当的变换形式,将其在通用有限元软件上实现。最后通过数值实验验证了这种方法具有良好的稳定性和计算精度,并且实施简单方便,其他人工边界条件可参照本文方法,通过变换形式在通用有限元程序中实现。; In practical calculation,it is often essential to truncate the unbounded medium in order to render the computational domain finite and apply absorbing boundary conditions at the computational boundary.A new method based on Higdon's absorbing boundary(HK ABCs) is introduced,which simplifies the computation procedure of the HK ABCs' partial equation by introducing a number of auxiliary variables.Then appropriately transforming the simplified equations to the form that is feasibly applied to commercial finite element code.In the transformation of the FEA discrete equations,the coherent forces which derived from the ABCs is moved to the right of the equation,equated to the boundary forces.In the resultant application,we can use any order of the ABCs in the FEA computation,meanwhile,keep FEA code running stably.Numerical examples are presented to illustrate the effectiveness of the method.Current limitations and possible extensions are also discussed.; 国家自然科学基金(10302014)资助项目
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/59537]
专题	清华大学
推荐引用方式 GB/T 7714	王兵见,刘天云,WANG Bing-jian,等. 通用有限元系统实现无限域波动仿真方法[J],2010, 2010.
APA	王兵见,刘天云,WANG Bing-jian,&LIU Tian-yun.(2010).通用有限元系统实现无限域波动仿真方法..
MLA	王兵见,et al."通用有限元系统实现无限域波动仿真方法".(2010).

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