摘要
为完善铁路货车的疲劳可靠性评估标准和评估体系,设计并建造了由电液伺服液压系统、机械结构系统、电气控制及安全监控系统、测试数据采集及处理系统以及配套的基础设施等5部分组成,以模拟摇枕的垂向、横向、纵向作动器及车钩力作动器为加载系统的铁路货车车体疲劳与整车振动试验台;基于所提出的车体疲劳试验(车体的在线运行状态模拟和加速疲劳试验)核心原理,开发了车体疲劳试验的线路动态响应谱测试、测试数据处理、试验台驱动文件编制、疲劳试验及其过程监控5项关键技术。以C70E型通用敞车的重车车体疲劳试验为例,在试验台上模拟其在北京—成都间累计运行等效总里程约314.2万km后,对该车车体的疲劳可靠性进行评估。结果表明:驱动文件重复执行时车体加速度的均方根误差小于5%、关键点应力的均方根误差小于17%,车体在线运行状态的模拟精度满足铁路货车车体疲劳试验的要求;C70E型通用敞车的车体能满足25a设计寿命的要求,验证了所提出试验原理及各项关键技术的适用性和有效性。
In order to improve the fatigue reliability assessment criteria and assessment system for railway freight car,the fatigue and whole vehicle vibration test rig for railway freight car body is designed and built,which consists of electro-hydraulic servo hydraulic system,mechanical structure system,electrical control and safety monitoring system,test data acquisition and processing system and appropriate matching infrastructure,with the load application system by means of vertical,lateral,longitudinal actuators and coupler force actuator on dummy bolster.Based on the core principle of the proposed car body fatigue test（online running state simulation of car body and the accelerated fatigue test）,5critical technologies are developed including line dynamic response spectrum test for car body fatigue test,test data processing,drive file establishment for test rig,fatigue test and procedure monitoring.Taking the car body fatigue test for C70 Etype gondola wagon for general purpose in loaded condition for example,after being simulated on the test rig for accumulated 3 142 000 km equivalent total mileage between Beijing and Chengdu,the fatigue reliability of the car body is assessed.Results indicate that,when the drive file is executed repeatedly,the root-mean-square error of car body acceleration is less than 5% and the root-mean-square error of critical point stress is less than 17%.The simulation precision for the online running state of car body meets the requirements for the fatigue test of railway freight car body.The car body of C70 Etype gondola wagon for general purpose can satisfy the requirement for the design life of 25 a.The applicability and effectiveness of the proposed test principle and key technologies are verified.
作者
于跃斌
李强
李向伟
张强
YU Yuebin LI Qiang LI Xiangwei ZHANG Qiang(School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China CRRC Qiqihar Rolling Stock Co. , Ltd. , Qiqihar Heilongjiang 161002, China)
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2017年第4期138-143,共6页
China Railway Science
基金
铁道部科技研究开发计划项目(2011J014-B)
