Abstract: In this paper the author makes use of the principle of virtual displacement and the cubic B-spline function as a piecewise function to analyze free vibration of orthotropic plate bridge. The author derives a computational scheme well suited for various boundary conditions for the orthotropic plate and plate-beam structures on rectangular region. The main prominent features of this method are more accurate and more economic in computing storage and time requirement. It is easily carried out with a medium-sized or small-sized computer.

摘要： 本文应用三次B样条函数作插值函数,从虚位移原理出发,对正交异性板桥的自由振动进行分析,得到适合矩形区域不同边界条件下正交异性板和板梁组合结构的计算格式。和一般有限元法比较,具有较高的精确度,计算量较小,占用内存和计算时间较少,易于在中小型电子计算机上实现等优点。