【摘 要】
：
为分析钢轨波磨对重载铁路有砟道床动力特性的影响,考虑道砟颗粒的不规则外形,采用离散单元法建立了有砟道床的数值模型.通过施加由车辆-轨道耦合动力学模型计算得到枕上动压
【基金项目】
：
中央高校基本科研业务费专项资金资助项目(2019YJS112)
论文部分内容阅读
为分析钢轨波磨对重载铁路有砟道床动力特性的影响,考虑道砟颗粒的不规则外形,采用离散单元法建立了有砟道床的数值模型.通过施加由车辆-轨道耦合动力学模型计算得到枕上动压力,分析了有砟道床在钢轨波磨条件下的动力响应.结果表明:钢轨波磨会降低道床稳定性,显著提高散体道床的振动水平;钢轨波磨区段砟颗粒之间的接触力会有较小程度的增大;钢轨波磨会增大道砟颗粒之间的滑动位移及摩擦耗能,加剧了道砟颗粒之间的磨耗.对比而言,钢轨波磨对有砟道床中道砟颗粒的振动加速度影响最大,对道砟颗粒磨耗影响次之,对道砟颗粒的接触力影响最小.
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