高层建筑多自由度气弹模型的设计

Design of multi-DOF aero-elastic model for high-rise buildings

设计了1个可重复利用的多自由度气弹模型,对该气弹模型的设计原理和调试方法进行了说明,并采用有限元方法对该模型进行模态分析,得到模型在不同刚度和质量条件下的模态参数。此模型能覆盖高层建筑的频率和振型指数变化范围,且只要两主轴方向柱子中心到原点的距离不相等,模型各主轴的前二阶平动振型均沿主轴方向。

Multi-degree aero-elastic wind tunnel test was considered to be the most reliable method for incorporating the interaction effects between a structure and wind action.However,the cost for constructing such a model is expensive.To reduce the cost,a reusable multi-degree aero-elastic model was developed in this study.This model can be simply manufactured,conveniently adjusted and it can be used to construct aero-elastic models with different shapes.The design principle and adjusting method of the multi-degree aero-elastic model was introduced in this paper.With finite element method,the modal analysis was conducted to obtain the modal parameters under different stiffness and mass conditions.The results showed that the first two natural frequencies and the fundamental mode shape can represent those of typical high-rise buildings.