嵌入式轨道超弹性力学属性对轮轨动态作用的影响研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (11) : 48-57.

论文

何傲男1,2,王凯1,2,徐井芒1,2,郝超江1,2,廖涛1,2,王平1,2

作者信息 +

Study on the influence of embedded track hyperelasticity on the dynamic action of wheel and rail

HE Aonan1,2, WANG Kai1,2, XU Jingmang1,2, HAO Chaojiang1,2, LIAO Tao1,2, WANG Ping1,2

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文章历史 +

摘要

嵌入式轨道结构内的聚氨酯填充材料具有非常明显的超弹性力学特性，对轨道系统的力学行为及振动噪声有较大影响。为研究填充材料超弹性特性对嵌入式轨道轮轨系统动力特性的影响，以焊接接头不平顺为例，建立了考虑填充材料超弹性本构的嵌入式轨道三维轮轨瞬态滚动接触有限元模型，分析了焊接接头不平顺对嵌入式轨道轮轨瞬态滚动接触力学行为的影响。结果表明：考虑填充材料超弹性本构的嵌入式轨道模型可以很好的模拟高分子材料受到外力冲击时的能量转换及减振过程。焊接接头不平顺中的短波不平顺波长和波深对轮轨冲击响应的影响十分显著。轮轨冲击载荷随车速的增加而增大，所对应的轮轨动态响应主频频段也会明显上移。钢轨表面接触应力极值出现的位置与焊缝几何形状关系很大，接触斑面积和接触应力的峰值基本出现在焊缝的低塌处。聚氨酯填充材料在对于较低频率（400Hz以下）的振动的抑制作用不明显，对500～2000Hz的高频振动具有良好的抑制作用，嵌入式轨道的减振特性表现出一定的频率相关性。

Abstract

Polyurethane filling material embedded in track structure has obvious superelastic properties, which has great influence on mechanical behavior and vibration and noise of track system.For the study of filler material hyperelastic properties of embedded track dynamic characteristics of wheel/rail system, the influence of welding joint is not smooth, for example, set up to consider filling material of the hyperelastic constitutive embedded track three-dimensional transient finite element model of rolling contact of wheel and rail, and analyses the influence of welding seam is not smooth embedded track wheel/rail transient rolling contact mechanics behavior.The results show that the simulation results can well simulate the energy conversion and vibration reduction process of polymer material when it is impacted by external force when the filler material adopts the hyperelastic constitutive model.The short wave irregularity wavelength and wave depth of welded joint have significant influence on wheel-rail impact response.The wheel/rail impact load increases with the increase of vehicle speed, and the corresponding main frequency band of wheel/rail dynamic response also moves up obviously. The location of the extreme contact stress on the rail surface has a great relationship with the geometry of the weld. The contact spot area and the peak value of the contact stress basically appear at the low collapse of the weld. The polyurethane filling material has no obvious inhibition effect on the vibration of lower frequency (below 400Hz), but has a good inhibition effect on the high frequency vibration of 500-2000Hz. The vibration reduction characteristics of embedded track show a certain frequency correlation.

导出引用

何傲男1,2,王凯1,2,徐井芒1,2,郝超江1,2,廖涛1,2,王平1,2. 嵌入式轨道超弹性力学属性对轮轨动态作用的影响研究[J]. 振动与冲击, 2023, 42(11): 48-57

HE Aonan1,2, WANG Kai1,2, XU Jingmang1,2, HAO Chaojiang1,2, LIAO Tao1,2, WANG Ping1,2. Study on the influence of embedded track hyperelasticity on the dynamic action of wheel and rail[J]. Journal of Vibration and Shock, 2023, 42(11): 48-57

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