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工程力学  2015 

基于向量式有限元的输电塔风致动力响应研究

DOI: 10.6052/j.issn.1000-4750.2013.08.0795, PP. 63-70

Keywords: 输电塔,风致响应,向量式有限元,动力分析,倒塌分析

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Abstract:

该文以某大跨越格构式输电塔风致响应为例进行向量式有限元的应用分析,采用C++语言编写杆系结构向量式有限元的计算程序,获得输电塔的响应并与传统有限元结果进行比较,探讨阻尼处理方法和计算步长对计算结果的影响,最后针对输电塔进行风荷载作用下的倒塌分析。研究表明,两种方法算得的位移响应非常接近;向量式有限元法的计算效率比传统有限元高,该文算例中计算时间相差约20倍;计算步长对有限元计算结果有影响,建议计算时进行试算;向量式有限元可以用来求解输电塔的倒塌问题。

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