桅杆结构在模拟风荷载下的非线性动力分析*
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李树逊 王肇民
(同济大学 上海 200092)[提要] 桅杆结构是一种具有较强几何非线性的结构,风荷载是其主要设计荷载。在对广义脉动风荷载样本模拟的基础上,采用增量形式的非线性有限元模型对桅杆的动力响应进行分析,并进行算例计算,说明提出的方法具有较好的精度。
[关键词] 桅杆 模拟风荷载 非线性动力分析Guyed mast is a kind of geometrical nonlinear structure.Wind load is its major design load. The method of wind load simulation is presented, and the nonlinear fimite element method is derived to analyze the dynamic response of guyed mast under the simulated wind load. Finally, a numerical example is given and the results show that the methods have excellent accuracy.
Keywords: guyed mast; simulated wind load; nonlinear dynamic analysis