【摘要】 在ANSYS中建立了输电塔线体系的有限元模型,利用Kaimal谱,基于AR法模拟了输电塔线体系各点的风速时程,分析了输电塔体系的风致动力响应,根据首次超越破坏机制,以输电塔顶点位移作为控制变量,采用Poisson过程法与Vanmercke法对比分析了风速重现期为50、100a时不同安全限值的输电塔动力可靠性。结果表明,两种方法计算结果基本一致,而Poisson法计算更简单。更多还原

【Abstract】 The finite element model of transmission tower line system is established with ANSYS.The AR method is applied to simulate wind speed time histories of transmission tower line system by using Kaimal spectrum.And it analyzes wind induced dynamic response of transmission tower system.According to the first excursion theory,taking the apex displacement of transmission tower as control variable,Poisson method and Vanmercke method are used to analyze the dynamic reliability of transmission tower system under different safety limits,which includes the reliability of design return period 50 and 100 years.The results show that two calculation methods are basically consistent while Poisson method is simple.更多还原