不同风向角对膜结构风致振动响应的影响分析

Numerical simulation of different wind directions on wind induced dynamic response of membrane structures

膜结构属于张拉力结构,质轻而柔且不具有抗弯刚度,外荷载作用下结构的变形比较显著,这些特点决定了膜结构对风荷载十分敏感。利用数值仿真方法对不同风向角柔性边界膜结构与周围风场的流固耦合进行模拟,对比分析了不同风向角对频率、位移以及应力的影响,从而给出最不利的风向角。

Membrane-cable structure,a typical type of light-weight tension structures,is flexible in rigidity,its cable and membrane have no bending resistance and can only bear tension force. So the deformation of structure is quite notable. In this paper,the fluid-structure interaction between the flexible boundary film structure with different wind direction angles and the surrounding wind field is simulated by numerical simulation method. The effects of different wind direction angles for frequency,displacement and stress are compared and analyzed,and the most disadvantageous wind direction angle is given.