大学物理 ›› 2022, Vol. 41 ›› Issue (6): 7-.doi: 10.16854/j.cnki.1000-0712.210538

• 教学研究 • 上一篇    下一篇

圆形或扇形薄板的横向振动问题 (一) 圆心处的边界条件

吴崇试   

  1. 北京大学 物理学院,北京100871
  • 收稿日期:2021-11-02 修回日期:2021-12-02 出版日期:2022-06-15 发布日期:2022-06-14
  • 作者简介:吴崇试(1938—),男,江苏泰州人,北京大学物理学院教授,博士生导师(已退休),一直从事理论物理的教学和科学研究工作

Transverse vibration of thin plate with circular or sector shape (I) Boundary conditions at circle center

WU Chong-shi   

  1. School of Physics, Peking University, Beijing 100871, China
  • Received:2021-11-02 Revised:2021-12-02 Online:2022-06-15 Published:2022-06-14

摘要: 从数理方程的角度探讨了圆形薄板的横振动问题,分析了现有文献中有关圆心处边界条件的谬误,提出了边界条件的正确形式.变分计算支持新边界条件的合理性.

关键词: 圆形薄板, 横振动, 边界条件, 固有振动频率

Abstract: The transverse vibration of circular plate is discussed from the point of view of equations of mathematical physics. The mistakes of the boundary conditions at the center of circle appeared in the existing literature are analyzed carefully. New boundary conditions are proposed and their reasonability is discussed from the calculus ofvariations.

Key words:  circular plate, transverse vibration, boundary conditions, frequencies of proper vibration