中国铁道科学2012，Vol.33Issue(3)：49-55,7.DOI:10.3969/j.issn.1001-4632.2012.03.08
采用新型钢轨焊缝保护装置后钢轨焊缝处的轮轨动力学特性
Wheel-Rail Dynamic Characteristics at Rail Welded Joint after Installing New Protection Device for Rail Welded Joint
摘要
Abstract
According to wheel-rail interaction mechanism, vehicle-track coupling dynamic model at rail welded joint was built after installing new protection device for rail welded joint. Simulation calculation was carried through on such wheel-rail dynamic indexes as wheel-rail vertical force, derailment coefficient, wheel unloading rate and so on. The wheel-rail dynamic characteristics at rail welded joint using new protection device for rail welded joint were analyzed and compared respectively with those of using bulge fish plate and those of without using any protection device for welded joint. The analysis and comparison results show that after using new protection device for rail welded joint, the decreasing range of wheel-rail vertical force is 1. 28% and 4. 63% respectively, that of derailment coefficient is 1. 49% and 2. 94% respectively, and that of wheel unloading rate is 3. 41% and 7. 68% respectively. The new protection device can effectively reduce vibration and the dynamic force of rail welded joint under all speed conditions. Thus it can be seen that the new protection device for rail welded joint can eliminate the hidden danger of bolt hole, effectively reduce dynamic response and strengthen track structure integrity at rail welded joint. The results of field dynamic test have further verified the rationality of the structure of new protection device for rail welded joint.关键词
钢轨焊缝/新型钢轨焊缝保护装置/轮轨相互作用/动力学特性/现场测试Key words
Rail welded joint/ New protection device for rail welded joint/ Wheel-rail interaction/ Dynamic characteristics/ Field test分类
交通工程引用本文复制引用
蔡小培,高亮..采用新型钢轨焊缝保护装置后钢轨焊缝处的轮轨动力学特性[J].中国铁道科学,2012,33(3):49-55,7.基金项目
国家自然科学基金资助项目(51108025) （51108025）
高等学校博士学科点专项科研基金资助课题(20110009120019) （20110009120019）
