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A Meshless Local Radial Point Interpolation Method for the Helmholtz Equation
Author(s):
LI Ying1
,
XIA Mao-hui1
,
DONG Kai2
Pages:
26
-
30
Year:
2012
Issue:
4
Journal:
Journal of Zhengzhou University (Natural Science)
Keyword:
无网格法
;
径向点插值法
;
Petrov-Galerkin法
;
Helmholtz方程
;
Abstract:
采用无网格局部径向点插值法(LRPIM)求解Helmholtz方程,这种无网格方法采用径向基函数耦合多项式基函数作为近似函数,并采用四次样条函数作为加权残值法中的权函数,运用局部Petrov-Galerkin方法推导出相应的离散方程,由于所构造的形函数满足Kronecker Delta性质,可以很方便地施加本质边界条件.此方法不需要积分网格,是一种真正的无网格法.数值结果表明,LRPIM法求解Helmholtz方程具有简洁、精度高和易于实现等优点.
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