【摘要】 本文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，根据考虑剪切变形的具有三个广义位移的平板振动理论对其动力问题进行了研究。利用两个双重级数为试函数，推出了四边简支边界条件下网架结构动力特性的精确解。在不考虑阻尼力的情况下，求得了其竖向地震响应的解，并且计算公式中的系数可利用竖向地震区应请求得。更多还原

【Abstract】 In this paper, according to tl1e tl2eory of plate in consideration of shear deformation and threegeneralized displacements, the orthogonal and ortho-laid space grids has been assumed as an or-thotropic sandwich plate composed of three different materials, and then its dynamic problems arestudied. In the case of simply supported space grids, its precise frequency equation can be derivedby using the two functions of a double trigonometric series. Without considering damping effects,the solutions of vertical seismic responses are given in the paper, and the coefficient in the for-mulas can be obtained by using the vertical seismic response spectrum.更多还原