But this partial differential equation can not be directly integral, so usually use Navier method, RayleighRitzmethod and finite difference method and other methods.
但这一偏微分方程不能直接积分，所以通常用纳维法、瑞利-里兹法、有限差分方法等方法求解。
2
The effects of geometry parameters of ellipse and stitching thread on buckling loads are investigated by RayleighRitz energy method.
通过应用瑞利里兹法研究了分层椭圆几何参数和缝线等效弹性系数对压缩屈曲载荷的影响。
3
Base on Rayleigh-Ritzmethod, a calculation formulation of action effect increment of a prestressed horizontal tension rod is firstly presented.