【摘要】 基于全过程时程分析方法,采用实用的动力稳定性判定准则,分析了在三种简单荷载作用下短程线型单层球面网壳结构动力稳定性能。阶跃荷载作用下考虑了初始几何缺陷和阻尼的影响,并对比了阶跃荷载与静力荷载作用下稳定临界值;简谐荷载作用下对比了共振区和非共振区的动力稳定性能;三角形荷载作用下考虑了不同持时的影响。通过不同参数变化对单层网壳结构动力性能的影响分析,得出了一些有意义的结论。更多还原

【Abstract】 According to the full-range time-history analysis method and using a practical dynamic stability behavior determinant criterion,the dynamic stability of geodesic single layer reticulated shells under three types simple loads are considered.When investigating the stability of the shells under step load,the initial geometric imperfection and the structural damping are taken into account and the relationship of geodesic reticulated shells under step loads and static loads is discussed.The dynamic stabilities of the resonance region and off resonance region of shells under harmonic load are analyzed respectively.The dynamic stability of shells under triangle load is analyzed considering the duration of the load.Finally,some meaningful conclusions are obtained by analyzing the influences of various parameters to the dynamic stability of the shells.更多还原