冲击荷载下K8单层球面网壳的破坏类型

FAILURE PATTERNS OF KIEWITT8 SINGLE-LAYER RETICULATED DOMES UNDER IMPACT LOADS

摘要: 首先介绍求解冲击问题解析法与数值法的算法基础，以及有限元求解的基本解法(中心差分法)。之后介绍了以上述为理论基础的计算冲击荷载的国际通用有限元软件ANSYS/LS-DYNA。并分别用解析法与有限元软件求解同一简单模型，互相校核；二者结论接近，验证了软件求解功能及相关参数设置的正确性。随后在ANSYS/LS-DYNA软件中建立了60m跨度K8型单层球面网壳抗冲击模型，在上述基础上，通过对135个算例的分析总结，根据竖向变形与塑性发展情况总结了K8单层球面网壳结构在顶点冲击荷载下的五种破坏类型及其分布规律。

Abstract: This paper introduces briefly the analytical methods and numerical methods to solve non-linear problems, and then ANSYS/LS-DYNA, a finite element software. In order to validate the function of software and the parameter selection, solutions of a simple problem are obtained by the analytical method and ANSYS/LS-DYNA respectively, and good agreement is achieved. Finally, the model of Kiewitt8 single-layer reticulated dome with a span of 60m is set up, and 135 cases are analyzed, with five failure patterns observed.