凯威特型索承网壳结构的自振特性及参数分析

Dynamic characteristics of Kiewitt cable-supported lattice shells

索承网壳结构是由单层球面网壳和去掉上层索的张拉整体结构组成的一种跨越能力大、经济合理的新型杂交空间结构。选用梁元、杆元和索元的混合有限元模型,采用分块Lanczos法,对凯威特型索承网壳结构的自振特性及其影响因素进行了系统分析研究,并与单层网壳结构进行比较,得出了可用于工程实践的结论,对其抗震、抗风性能分析研究以及工程应用有参考价值。

Cable-supported lattice shell is a new kind of economic and larger spanning hybrid spatial structure system, which is consisted of single-layer spherical lattice shells and tensegrity systems with rid of cables located at the upper layer. The finite dement model of the hybrid spatial structure system is built by the beam elements, truss elements and cable elements, its dynamics characteristics and the influence of some parameters are analyzed thor- oughly here by the block Lanczos method, and then the computed results are compered with single-layer reticulated shell. The results are valuable for the dynamic response research on the earthquakes and wind vibration and the engineering design of the cable-supported lattice shells.