摘要
本文针对非光滑区域上椭圆特征值特征值问题利用间断有限元方法(DG)近似.利用大量的数值算例发现,DG方法对非光滑区域(凹角,裂缝等问题)上Laplace特征值问题的近似比协调有限元、非协调元(如C-R元),甚至比有限元校正格式有着更好的效果.
Elliptic eigenvalue problems in nonsmooth domain by using of discontinuous galerkin (DG) methods were analyzed. From many numerical results we find that for elliptic eigen- value problems in nonsmooth domain DG methods provide better approximation than other methods, such as conforming of nonconforming finite element method, and finite element defect correction scheme.
出处
《数值计算与计算机应用》
CSCD
2012年第4期293-300,共8页
Journal on Numerical Methods and Computer Applications
基金
国家高技术研究发展计划(编号:2010AA012301)
国家重点基础研究发展计划(编号:2010CB428403)资助
关键词
间断有限元
椭圆型方程
特征值问题
非光滑区域
discontinuous galerkin methods
elliptic problems
eigenvalue problem
nonsmooth domain