摘要
为研究货车车轮扁疤状态下的动力学表征,为车轮扁疤的间接识别提供理论支撑,建立了配置有转K6转向架的C80铁路货车动力学模型,并推导了扁疤对钢轨的垂向冲击力公式及振动加速度公式,研究了车轮扁疤故障状态下的车轮轮轨力响应、承载鞍振动响应情况,并分析了故障状态下车轮扁疤长度与轮轨垂向力对应关系,为扁疤的故障检测和识别提供基础支撑。结果表明:扁疤故障状态下,轮轨垂向力与扁疤长度呈正比例关系,且轮轨力最大值随车辆运行速度增大而呈现先增大后缓慢减小的趋势,承载鞍振动加速度变化趋势与轮轨垂向力基本保持一致。
To study the dynamic characterization of the railway wagon under wheel flat condition,and provide theoretical support for the indirect identification of flat fault,a C80 railway wagon dynamic model with K6 bogie is established,and the formulas of vertical impact force and vibration acceleration of adapter which under the impact of flat has been derived.The responses of wheel and rail force and adapter vibration under flat fault are studied.What′s more,the relationship between the length of the flat and the vertical force of the wheel and rail under the fault state is analyzed,which can provides the basic support for the fault detection and identification of the flat.The results show that:the vertical force of wheel and rail is proportional to the length of the flat,and the maximum of wheel and rail force increases first and then decreases slowly with the increase of vehicle speed.The adapter acceleration has a same change trend with the vertical force of wheel and rail.
作者
丁春嵘
彭莘宇
汪群生
DING Chunrong;PENG Xinyu;WANG Qunsheng(Shenhua Railway Equipment Co.,Ltd.,Cangzhou 061113,Hebei,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《机械科学与技术》
CSCD
北大核心
2021年第8期1279-1284,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(U2034210)
牵引动力国家重点实验室自主课题项目(2019TPL-T18)。
