摘要
本文从运动学的角度,基于非线性运动平衡方程,对单层球面网壳结构发生跳跃失稳时的运动特性进行了研究。在结构达到临界失稳状态的前后分别采用基于静力的几何非线性分析方法和基于动力响应的几何非线性分析方法,描述结构的实际行为特性。对网壳结构失稳时的加速度、速度与位移等结构响应的研究,揭示了失稳的运动本质,为结构稳定性分析、失稳机制和结构失稳的传播特性的研究提供了另一条途径。
The local buckling of a node, which is one of the most dangerous forms of instability in single-layer reticulated domes. It is characterized by a snap-through buckling which can cause the collapse of a large zone. Based on the nonlinear equilibrium equations, the dynamic behavior of snap-through buckling in single-layer reticulated domes is studied. The new approach which combines the static geometrically nonlinear analysis for pre-buckling and the dynamic geometrically nonlinear analysis for post-buckling is employed to describe the natural behavior of single-layer reticulated domes during buckling. Examples show that the method is effective for the study of the buckling mechanism and the potential propagation of buckling in single-layer reticulated domes.
出处
《工程力学》
EI
CSCD
北大核心
2002年第1期9-13,共5页
Engineering Mechanics
基金
国家自然科学基金资助项目(59878049)
