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摘要: 基于轮轨刚性接触给出了轮轨准弹性接触的计算方法, 开发了TPLWRSim软件, 计算了高速动车组标准车轮踏面和磨耗车轮踏面轮轨接触关系, 并对TPLWRSim软件与SIMPACK软件的轮轨关系计算结果进行了对比分析。分析结果表明: 对于标准S1002CN踏面, 准弹性接触对接触点横坐标的修正量最大为5.26 mm, 磨耗后最大为11.10 mm; 对于标准LMA踏面, 修正量最大为3.82 mm, 磨耗后最大为13.14 mm。由TPLWRSim软件计算的准弹性轮轨接触关系与SIMPACK计算结果基本一致。轮轨准弹性接触能很好地改变刚性接触点跳变、不均匀、不连续的特征, 使其变得更光滑连续。计算结果可用于磨耗后踏面的跟踪测试, 具有很好的实用价值。Abstract: Base on wheel-rail rigid contact, a calculation method of quasi-elastic contact was presented.TPLWRSim software was developed based on the contact method to calculate the wheel-rail contact relationships of standard and worn tread of high-speed EMU respectively, and the calculation results were compared with the results of SIMPACK software.Analysis result indicates that the maximum modified value of quasi-elastic contact point abscissa for standard S1002CN tread is 5.26 mm, and the value is 11.10 mm for worn tread.For standard LMA tread, the maximum modified value is 3.82 mm, and the value is 13.14 mm for worn tread.Wheel-rail quasi-elastic contact relationships calculated by TPLWRSim and SIMPACK are basically identical.Wheel-rail quasi-elastic contact can better change the characteristic of rigid contact with sharp, discontinuity and large dispersion contact point, and makes the contact point more smooth and continuous.The calculation result can be used for the track test of worn tread, and will have very good practicality.
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图 4 S1002CN踏面权重系数变化曲线
Figure 4. Changing curves of weighted coefficients of S1002CN tread
图 5 轮对横移量为0时刚性和准弹性接触点
Figure 5. Rigid and quasi-elastic contact points when wheelset lateral displacement is 0
图 6 标准S1002CN和LMA刚性和准弹性轮轨接触关系
Figure 6. Rigid and quasi-elastic wheel-rail contact relationships of standard S1002CN and LMA treads
图 7 刚性和准弹性轮轨接触几何关系对比
Figure 7. Geometry relationship comparison between rigid and quasi-elastic wheel-rail contacts
图 11 磨耗后S1002CN踏面轮轨接触关系
Figure 11. Wheel-rail contact relationships of worn S1002CN tread
图 13 磨耗后踏面准弹性接触点横坐标修正量变化曲线
Figure 13. Changing curves of modified values of quasi-elastic contact point abscissas for worn treads
表 2 S1002CN踏面刚性和准弹性接触点比较
Table 2. Comparison between rigid and quasi-elastic contact points of S1002CN tread
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表 3 LMA踏面刚性和准弹性接触点比较
Table 3. Comparison between rigid and quasi-elastic contact points of LMA tread
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表 4 标准踏面刚性和准弹性轮轨接触特征
Table 4. Rigid and quasi-elastic wheel-rail contact characteristics of standard tread
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表 5 磨耗后踏面刚性和准弹性轮轨接触特征
Table 5. Rigid and quasi-elastic wheel-rail contact characteristics of worn tread
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