高速铁路接触网分段绝缘器静力学仿真与模态分析

基于为高速铁路接触网分段绝缘器的设计和评估提供合理参考,对某型号分段绝缘器进行静力学仿真以及模态分析,根据该分段绝缘器的结构特点,建立简化的有限元几何模型;并依据相关标准对分段绝缘器分别施加最大工作负荷31.5 kN以及拉伸破坏负荷下限94.5 kN进行静态强度计算,计算结果表明在两个工况下的分段绝缘器最大应力值均出现在线夹部分,满足该部分的材料屈服强度,也满足屈服强度较小的底座部分的材料屈服强度,经对分段绝缘器的空气绝缘间隙进行查看,其结果表明在两种工况下,空气间隙未发生变化,两侧间隙值均处在438 mm左右,满足了标准中给出的不小于300 mm的要求;另外还分析了该分段绝缘器前9阶的自由模态,给出了各阶模态下的固有频率与振型。

With regard to providing the reasonable reference for the design and evaluation of OCS section insulator of high-speed railway,the static simulation and modal analysis of a certain type of section insulator are carried out.According to the structural characteristics of the section insulator,a simplified finite element geometric model is established;and in accordance with relevant standards,the maximum working load of 31.5 kN and the lower limit of tensile failure load of 94.5 kN are respectively applied to the section insulator for static strength calculation.The calculation results show that the maximum stress value of the section insulator under two working conditions appears around the clamp,conforming to the material yield strength of the clamp and the base with small yield strength,after checking the air insulation gap of the segmented insulator,the results also show that under the two working conditions,the air gap does not change,with the air gap values maintaining to be 438 mm on both sides,complying with the requirements of no less than 300 mm stipulated in the standard.Additionally,the first 9 free modes of the segmented insulator are analyzed,and the natural frequencies and vibration modes of each mode are presented accordingly.