摘要
本文根据考虑剪切变形的具有３个广义位移的平板弯曲理论，把正交正放类平板网架假设为由三层不同性质材料组成的各向正交异性夹层板。文中以双５次Ｂ样条函数中的一组基底作为试函数，用加权残值法中的离散型Ｇａｌｅｒｋｉｎ法，导出了这类网架的频率方程和屈曲方程。数值算例表明，这种方法是方便而精确的。
According to the theory of plate with consideration of shear deformation and three gen -eralized displacements,the orthogonal and ortho-laid space truss has been assumed as or-thotropic sandwich plate with three different materials in this paper.A basic function,andthe frequency equations and buckling equations of the space truss is given by dispersedGalerkin method of MWR. Numerical examples show that the method is simple and accura-cy.
关键词
固有频率
屈曲
样条函数
结构力学
网架结构
natural frequency.buckling/equivalent sandwich plate,spline function
residual noatrix
