摘要
本文回顾了近代非线性薄壳稳定理论的发展历史,认为薄壳稳定理论的研究大体经历了三个阶段:第一阶段为针对完善结构的线性弹性理论;第二阶段为考虑结构几何缺陷的非线性弹性理论;第三阶段为考虑实际材料性能的非线性弹塑性理论。目前正在进入第四阶段,即开始考虑结构物理缺陷的影响。最新的三个主要研究方向是:1)非线性薄壳有限元分析方法;2)材料局部损伤过程对薄壳稳定性的影响;3)带裂纹薄壳的稳定性分析。文中分别就这三个方向的研究现状进行了调查分析,并对今后的研究趋势进行了展望。
The development in nonlinear theories of stability for thin-walled shell was reviewed in this article and it was suggested that the theoretical research on the stability of thin shell has experienced three stages:the linear-elastic theories for perfect structures,the nonlinear-elastic theories for geometrical imperfect structures, the nonlinear and elastic-plastic theories. At present, the fourth stage begins to consider the influence of the physical defects such as crack. The recent main researches directions on the stability of thin-walled shell are: (1) nonlinear FEM method for thin-walled shells; (2) the influence of local damage on the global stability of thin shells; (3) the stability analysis of the thin shells with cracks. Finally,the advance in these three fields was reviewed systemically and future research trend were prospected outlook.
出处
《建筑钢结构进展》
2006年第4期23-32,共10页
Progress in Steel Building Structures
基金
广东省自然科学基金项目(04011764)
关键词
薄壳
稳定性理论
非线性
薄壳有限元
塑性损伤
裂纹
thin-walled shell
stability theory
nonlinearity
finite element
plastic damage
cracks