基于Abaqus/Fe-Safe的输电线耐张串金具多轴疲劳分析方法研究  

Research on Multi-Axial Fatigue Analysis Method of Transmission Line Tension String Fittings Based on Abaqus/Fe-Safe

作　　者：李清 叶中飞 黄睿 刘泽辉 刘小会[2] LI Qing;YE Zhongfeil;HUANG Rui;LIU Zehui;LIU Xiaohui(State Grid He'nan Electric Power Research Institute,Zhengzhou 450052,Henan,China;College of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]重庆交通大学土木工程学院,重庆400074

出　　处：《力学季刊》2022年第3期659-669,共11页Chinese Quarterly of Mechanics

基　　金：国家电网有限公司总部科技项目(5200-202024142A)。

摘　　要：为研究由多构件构成的输电线耐张串金具在外部荷载作用下的疲劳寿命,提出了以多个静力组合荷载构成的工况计算疲劳寿命的方法.首先在Abaqus中建立输电线耐张串金具有限元模型,分别求解在随机风荷载作用下的动力分析和由不同组合荷载组成多工况静力分析的应力解.将其导入Fe-Safe中,计算动力工况和不同静力工况的疲劳寿命.以FOS(Factors of Strength)强度因子为评估指标,对比动力与静力工况的疲劳寿命结果的区别,探究不同静力工况的应力解对疲劳寿命结果的影响.结果表明:该方法可有效地提高此类结构的计算效率;非线性较强的U形挂环和球头挂环受初始应力影响较大,会产生较大的相对误差;但在实际载荷分量变化范围以内,各构件静力与动力工况的疲劳寿命预测结果相差不大.In order to study the fatigue life of multi-component transmission line tension strings under external loads,a method for calculating the fatigue life under multiple combined static loads is proposed.Firstly,a finite element model of transmission line tension strings is established in Abaqus to solve the dynamic stress response under random wind load and the multi-condition static stress response under different combined loads.Through introducing the model into Fe-Safe,the fatigue life under dynamic and different static conditions is calculated.Taking FOS(Factor of Strength)intensity factor as the evaluation index,the differences of fatigue life results between the dynamic and static conditions are examined to explore the influence of stress solutions under different static conditions on the fatigue life results.The results show that the proposed method can effectively improve the calculation efficiency of such structures.The U-shaped and ball-head rings with strong non-linearity are greatly affected by the initial stress and will result in relatively large errors.Nevertheless,within the changing range of the actual load components,the fatigue life prediction results of components under the static and the dynamic conditions do not differ much from each other.

关 键 词：疲劳寿命 多轴分析 Fe-Safe 输电线金具 

分 类 号：U467.497[机械工程—车辆工程] TM743[交通运输工程—载运工具运用工程]