J4 ›› 2012, Vol. 50 ›› Issue (03): 397-.

• 数学 • 上一篇    下一篇

一维Lagrange四次元有限体积法的超收敛性

李莎莎1,2, 左平3   

  1. 1. 吉林大学 数学研究所, 长春 130012|2. 大庆师范学院 数学科学学院, 黑龙江 大庆 163712;3. 空军航空大学 基础部, 长春 130022
  • 收稿日期:2011-11-16 出版日期:2012-05-26 发布日期:2012-05-28
  • 通讯作者: 李莎莎 E-mail:lishashasha@sina.com

Superconvergence of One Dimension LagrangeFourthOrder Finite Volume Element Method

LI Shasha1,2, ZUO Ping3   

  1. 1. Institute of Mathematics, Jilin University, Changchun 130012, China;2. Department of Mathematics, Daqing Normol University, Daqing 163712, Heilongjiang Province, China;3. Department of Foundation, Aviation University of Air Force, Changchun 130022, China
  • Received:2011-11-16 Online:2012-05-26 Published:2012-05-28
  • Contact: LI Shasha E-mail:lishashasha@sina.com

摘要:

通过取等距节点四次Lagrange插值的导数超收敛点作为对偶单元的节点, 取Lagrange型四次有限元空间为试探函数空间, 取相应于对偶剖分的分片常数函数空间为检验函数空间的方法, 得到了求解两点边值问题的四次元有限体积法, 证明了该方法具有最优的H1模和L2模误差估计, 并讨论了对偶单元节点的导数超收敛估计. 数值实验验证了理论分析结果.

关键词: 两点边值问题, 四次有限体积元法, 导数超收敛点, 误差估计

Abstract:

We chose fourth order Lagrange interpolated function associated with the nodes as trial function, piecewise constant function as test function, and derivative superconvergent points as dual partition nodes so that a new kind of Lagrange fourth order finite volume element method was obtained for solving twopoint boundary value problems. It was proved that the method has optimal H1 and L2 error estimates. The superconvergence of numerical derivatives was discussed. Finally, the numerical experiments show the results of theoretical analysis.

Key words: twopoint boundary value problem, fourth order finite volume element method, derivative superconvergent point, error estimate

中图分类号: 

  • O241.82