覆冰荷载作用下腐蚀地线的动力特性研究

Investigation on Dynamic Properties of Corrosive Ground Wires Subjected to Icing Loads

考虑架空地线腐蚀损伤影响并建立其覆冰荷载模型,随后建立了腐蚀架空地线的力学模型和非线性响应分析方法,建立了覆冰腐蚀地线的动力特性分析计算方法。以我国南方某架空地线为实际工程背景,研究了覆冰腐蚀架空地线的动力特性并进行了参数研究。结果表明:覆冰荷载和腐蚀率均对架空地线的动力特性具有较为显著的影响。此外,架空地线的档距等参数也对腐蚀地线的动力特性具有较为显著的影响。

The icing load model of ground wires was established by considering corrosive damages of ground wires.The mechanical model and nonlinear analytical method of corrosive ground wires were developed.Then,the analytical approach for the dynamic properties of corrosive ground wires subjected to icing loads was proposed.A real ground wires in southern China was taken as an actual example to examine the dynamic properties of corrosive ground wires under icing loads.A parametric investigation was also carried out to study the effects of various wire parameters.The made observations indicate that the influences of icing loads and corrosive rate on the dynamic properties of the corrosive ground wire are obvious.In addition,the span of corrosive ground wires has an important influence on the structural dynamic properties.