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Poisson方程特征值的四种有限元解及比较 被引量:16

FOUR FINITE ELEMENT SOLUTIONS AND COMPARISON OF PROBLEM FOR THE POISSON EQUATION EIGENVALUE
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摘要 本文应用双线性元、旋转双线性元、拓广旋转双线性元、Wilson元计算Poisson方程的近似特征值.计算结果验证了[4]中特征值问题的有限元渐进误差展开理论的正确性.最后,我们分析了旋转双线性元的近似解的特殊情况,并预测了Wilson元给出特征值的下界. In this paper, we compute the approximate eigenvalue of Poisson equation using bilinear finite element, Q1rot finite element, extension Q1rot finite element and Wilson finite element. The computational results demonstrate the finite element asymptotic expansion theory for eigenvalue problem provided in [4]. Moreover we analyze the special condition of Q1rot finite element solutions, and predict that the Wilson finite element solution is lower approximation.
出处 《数值计算与计算机应用》 CSCD 2005年第2期81-91,共11页 Journal on Numerical Methods and Computer Applications
基金 国家重点基础研究专项基金(No.G2000067102)国家自然科学基金(No.60474027)中国科学院数学与系统科学研究院创新基金资助项目.
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  • 2Lin Qun, Finite Element Method: Accuracy and Extrapolation(to appear).
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