摘要
根据广深线钢轨斜裂纹的形成与发展特点,提出采用非对称打磨技术控制和减缓钢轨斜裂纹的形成,并进行了数值计算和现场打磨试验.数值计算结果表明:钢轨非对称打磨可以改变轮轨接触几何参数,使轮轨接触点向钢轨顶面中心移动,远离钢轨轨肩位置,并降低轮轨接触应力.现场打磨试验验证了数值计算结果,试验结果表明钢轨非对称打磨能改变钢轨光带,使接触点向钢轨踏面中心移动.
On the basis of formation and development characteristics of oblique rail cracks in Guangzhou-Shenzhen railway line, the rail asymmetrical grinding was used to prevent and decrease the appearance of oblique cracks. A field grinding test and numerical calculation were carried out. The calculated results show that the rail asymmetrical grinding has an effect on wheel-rail contact parameters, makes the wheel-rail contact point move from the shoulder of rail to the center of rail top surface, and decreases wheel-rail contact stress. The field grinding test has proven the above calculated results. The field test results indicate that the rail asymmetrical grinding can change the contact zone of wheel and rail and make the contact point move toward the center of rail tread.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2007年第5期574-577,共4页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(50675183)
国家创新研究群体基金资助项目(50521503)
关键词
钢轨打磨
斜裂纹
轮轨接触参数
接触应力
rail grinding
oblique crack
wheel-rail contact parameter
contact stress
