CR400AF型高速列车车轮擦伤引起的轮轨冲击台架试验研究Study on Wheel/Rail Impact Caused by Wheel Flat of CR400AF High Speed Train Using Rig Test
蔡园武;常崇义;陈波;林鹏飞;
摘要(Abstract):
由于轮轨滚动接触的复杂性,在有限的建模精度下用数值仿真很难指导实际运营,且现场试验成本太高。为解决这一问题,利用全尺寸高速轮轨关系试验台,采用CR400AF型高速列车真实车轮和一系悬挂,在车轮踏面滚动圆处预制不同长度、宽度和深度的擦伤,进行不同车轮擦伤下0~400 km·h(-1)速度范围内的轮轨冲击试验,分析车轮擦伤长度、运行速度对轮轨垂向力和轴箱振动加速度的影响规律。结果表明:轮轨垂向力最大值随车轮擦伤长度的增加而增加,在0~35 km·h(-1)速度范围内的轮轨冲击试验,分析车轮擦伤长度、运行速度对轮轨垂向力和轴箱振动加速度的影响规律。结果表明:轮轨垂向力最大值随车轮擦伤长度的增加而增加,在0~35 km·h(-1)速度范围内随速度的增加逐渐增加,并在约35 km·h(-1)速度范围内随速度的增加逐渐增加,并在约35 km·h(-1)速度时达到最大,然后随速度的增加逐渐减小;在车轮擦伤冲击下,轴箱振动加速度最大值的变化规律与轮轨垂向力最大值基本一致;从车轮擦伤安全限界分布发现,危险区为舌状分布,车轮擦伤后速度要尽可能避开 25~70 km·h(-1)速度时达到最大,然后随速度的增加逐渐减小;在车轮擦伤冲击下,轴箱振动加速度最大值的变化规律与轮轨垂向力最大值基本一致;从车轮擦伤安全限界分布发现,危险区为舌状分布,车轮擦伤后速度要尽可能避开 25~70 km·h(-1)速度区间,擦伤长度大于60 mm时不建议上线运行。
关键词(KeyWords): 车轮擦伤;高速轮轨关系试验台;轮轨垂向力;轴箱振动加速度;速度限制
基金项目(Foundation): 中国国家铁路集团有限公司科技研究开发计划课题(2015J007-E);; 中国铁道科学研究院集团有限公司院基金课题(2021YJ013)
作者(Authors): 蔡园武;常崇义;陈波;林鹏飞;
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