计算物理 ›› 1997, Vol. 14 ›› Issue (1): 121-128.

• 论文 • 上一篇    

极坐标系中的B样条有限元法在求解尖角奇异边值问题中的应用

李融林1, 倪光正1, 俞集辉2   

  1. 1. 浙江大学电机工程系, 杭州 310027;
    2. 重庆大学电气工程系, 重庆 630044
  • 收稿日期:1995-04-24 修回日期:1996-09-16 出版日期:1997-01-25 发布日期:1997-01-25
  • 基金资助:
    国家自然科学基金

APPLICATION OF THE B SPLINE FINITE ELEMENT METHOD IN POLAR COORDINATES TO SOLVING BOUNDARY VALUE PROBLEMS WITH SINGULARITIES AT A SHARP CORNER

Li Ronglin1, Ni Guangzheng1, Yu Jihui2   

  1. 1. Department of Electrical Engineering, Zhejiang University;
    2. Department of Electrical Engineering, Chongqing University
  • Received:1995-04-24 Revised:1996-09-16 Online:1997-01-25 Published:1997-01-25

摘要: 基于尖角状角点附近的场分布特性,提出了应用极坐标系中的B样条有限元法求解尖角奇异边值问题。该方法具有精度高和易于实现等优点。通过对Motz问题、裂梁问题以及扇形波导本征值问题等尖角奇异边值问题的计算分析,验证方法的有效性。

关键词: 奇异性, 极坐标, B样条, 有限元

Abstract: Based on the distribution characteristic of fields in the neighbourhood of a sharp corner, the B spline finite element method in polar coordinates is exploited for solving the boundary-value problems with singularities at the sharp corner. The proposed method improves the overall accuracy and is convenient to implement. The Motz problem, cracked-beam problem, and eigenvalue problem for the sector waveguides are calculated and analyzed to verify the validity of the method.

Key words: Singularity, polar coordinates, B-spline, finite element

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