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针对网壳的空间三维受力特点 ,考虑多自由度空间相关性、多模态以及模态互相关性作用的影响 ,提出了网壳结构的空间三维风振随机干扰有限元模型 ,并基于随机振动理论 ,推导了脉动风作用下网壳结构响应的计算公式 .编制了网壳风振计算分析专用程序 Gwind.通过大量算例分析表明 ,计算效率较高 ,可应用于网壳实际工程风振设计 .文中还给出了几种典型工况下单层球面网壳的风振数值分析结果
According to the three-dimensional force characteristics of the reticulated shell and considering the influence of multi-degrees of freedom spatial correlation, multi-modal and modal cross-correlation, a three-dimensional finite element model of wind-induced random disturbance of the reticulated shell structure is proposed. Vibration theory, the calculation formula of the response of the reticulated shell under the action of pulsating wind is deduced.The special program Gwind for the calculation and analysis of the reticulated wind vibration is developed.A large number of example analyzes show that the computation efficiency is high and can be applied to wind-induced vibration The paper also gives the numerical results of wind vibration of single-layer spherical reticulated shells under several typical conditions