网壳结构非线性动力稳定分析  

NONLINEAR STABILITY ANALYSIS OF SPACE FRAME STRUCTURES UNDER DYNAMIC LOADS

作　　者：孙建恒[1] 夏亨熹[1] 

机构地区：[1]河北农业大学城乡建设学院

出　　处：《空间结构》1994年第1期25-31,共7页Spatial Structures

摘　　要：本文利用非线性有限元方法，对两个网壳的动力稳定性能进行了分析。在分析过程中，分别考虑了突加阶跃荷载、简谐变化荷载及三角形脉冲荷载。对于简谐变化荷载及三角形脉冲荷载，还讨论了振动周期及脉冲持续时段对网壳临界荷载的影响。Abstract In this paper,the large displacement stabilily behavior of two well known domes subjected to dynamic loads are examined by the geometrically nonlinear finite element method based on the updated lagrangian Coordinate.Three types of time dependent loading cases are considered,namely,step load and sinusoidal load of infinite duration and triangular load of finite duration.In the numerical analysis,the Newmark method is used to solve the nonlinear equation of motion.

关 键 词：脉冲荷载 网壳结构 临界荷载 动力稳定性 非线性有限元 振动周期 利用 

分 类 号：TU375[建筑科学—结构工程] TU356