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工程力学  2015 

索杆结构中索滑移行为分析的有限质点法

DOI: 10.6052/j.issn.1000-4750.2013.12.1126, PP. 109-116

Keywords: 有限质点法,索杆结构,滑移索单元,索滑移分析,张弦桁架

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Abstract:

索杆结构成形过程中,连续索在一些节点处能够相对滑移,索与节点间的连接不能按铰接简单处理,传统有限元对此类问题的求解多有不便。针对索在节点处的滑移问题,该文采用一种新型分析方法—有限质点法,将连续索离散成相互联系的质点集合,质点运动满足牛顿第二定律,索的滑移行为通过质点的运动来描述。该文推导了滑移索单元内力求解公式,提出了滑移索单元的判定方法,通过自编程序对算例进行计算分析,验证了滑移索单元的正确性和合理性。

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