摘要
考虑几何非线性但不计横向剪切效应，给出了复合材料层合钱供的动力方程；利用伽辽金法求出了均布阶跃载荷作用下，两端铰支、正交铺层的对称层合浅拱在计及初始几何缺陷情况下的动力响应，并由Ｂ－Ｒ准则分析了动力稳定性．计算结果表明：初始缺陷对于结构参数γ较大的拱的临界动力载荷有很大的影响．
In this paper,the non-linear dynamic governing equations of the generally laminated shallow arches are derived,the effects of geometric non-linearity ar considered but the effects of transverse shear are neglected.By using the Galerkin method,the dynamic responesare obtainedfor a simple supported and symmetrically laminated shallow arch with initial imperfections under uniform step lading.The budiansky-Roth motion criterion is used to define dynamic snap-through bucking loads.The results indccate that the arch is quite sensitive to imperfections,as long as the shape parameter γof the arch is not very small.
出处
《固体力学学报》
CAS
CSCD
北大核心
1996年第2期172-178,共7页
Chinese Journal of Solid Mechanics
基金
航空基金
关键词
复合材料
浅拱
动力屈曲
初始缺陷
composite material
shallow arch
dynamic buckling
initial imperfections
