【摘要】 主要研究了平板网架子结构圆柱面交叉立体桁架系巨型网格结构的动力特性,包括主体结构单独承载及其与子结构协同承载两种情况下的自振频谱规律、结构前面若干低阶振型特征等;就各方向首阶振型的出现次序及其对应周期值进行了主体结构矢跨比、长跨比、立体桁架梁高度、子结构高度、杆件截面、载荷等一系列参数分析,从而了解了不同参数变化对结构各方向刚度的影响。为该结构体系的抗震设计、参数选择提供了理论依据与指导。更多还原

【Abstract】 For the cylindrical latticed intersected three-dimension beam system(LITDBS) reticulated mega-structure with double layer grid sub-structures, the dynamic characteristics of the structure are analyzed in this paper. The basic eigen-vibration of the LITDBS reticulated mega-structure is studied under the condition that the load-bearing contribution of the sub-structure is included. A series of parameter analyses are carried out for the sequence of the first modes of different directions. The influence of the parameters on the structural stiffness of different direction has been obtained. All this work will provide guide in theory for the aseismatic design of this kind of structure.更多还原