Effects of key parameters of elastic polymer draft gear on longitudinal impulse of rapid speed wagon
ZHAO Xubao1, WEI Wei2, DONG Liangyu1, LI Jing1
1.School of Computer and Communication Engineering, Dalian Jiaotong University, Dalian 116028, China;
2.College of Locomotive and Rolling Stock Engineering, Dalian Jiaotong University, Dalian 116028, China
According to the structural principle of the elastic polymer draft gear, a dynamic model of elastic polymer draft gear based on the speed-dependent characteristics of the elastic polymer was established, and the influences of the key parameters of the elastic polymer draft gear on the longitudinal impulse of the rapid speed wagon is analyzed by using the train air brake and longitudinal dynamics integrated simulation system.The simulation results show that the parameters of the mounting preload and the flow index of elastic polymer have a greater impact on the longitudinal impulse of the rapid speed wagon, while the comprehensive equivalent stiffness related to the mechanism has a smaller effect on it.With the continuous increase of the mounting preload of the draft gear, the maximum value of the coupler force and acceleration both gradually increases; When the mounting preload changes from 20 kN to 100 kN, the maximum train coupler force increases by 14.4%,and the maximum acceleration increases by 32.9%.When the flow index of elastic polymer changes within the range of 0.1 to 0.5, the maximum coupler force and acceleration will change slightly, but when the flow index of elastic polymer changes within the range of 0.5 to 0.9, both of them increase exponentially with the increase of the flow index of elastic polymer,the maximum coupler force increases by 51.7%,and the maximum acceleration increases by 59.5%. This work provides theoretical guidance for the design of the structural parameters of the new elastic polymer draft gear.
[1] 周晓坤,贺茂盛,邵文东等.快捷运输新技术发展与展望[J].铁道车辆,2020,58(8):6-9.
Zhou Xiao-kun,He Mao-sheng,Shao Wen-dong,et al. Development and Prospects of New Technology in Rapid Transport[J].Rolling Stock, 2020,58(8):6-9.
[2] 田葆栓.国内外铁路快捷运输货车技术发展分析[J].铁道车辆, 2017,55(4):1-5.
TIAN Bao-shuan. Analysis of Technical Development of Railway Rapid Transport Freight Cars in China and Abroad[J]. Rolling Stock, 2017,55(4):1-5.
[3] Olshevskiy Alexander, Olshevskiy Alexey, Inshakova Svetlana, et al. Freight cars shunting impacts analysis using an improved dynamic model of friction draft gear[J].Vehicle System Dynamics, 2018,56(10): 1492-1507.
[4] Wu Qing, Luo Shihui, Qu Tianwei ,et al.Comparisons of draft gear damping mechanisms. Vehicle System Dynamics ,2017,55(4): 501-516.
[5] Wu Q, YANG X, COLE C, et al. Modelling polymer draft gears[J]. Vehicle System Dynamic, 2016, 54(9): 1208-1225.
[6] Zhu Tao, Yang Bao-zhu, Yang Chao,et al.The mechanism for the coupler and draft gear and its influence on safety during a train collision[J]. Vehicle System Dynamics ,2018,56(9): 1375-1393.
[7] COLE C, SUN Y Q. Simulated Comparisons of Wagon Coupler Systems in Heavy Haul Trains[J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit,2006,220(3):247-256.
[8] COLE C,MCCLANACHAN M,SPIRYAGIN M, et al. Wagon instability in Long Train[J].Vehicle System Dynamic, 2012, 50(s1): 303-317.
[9] 黄运华,李芾,傅茂海. 车辆缓冲器特性研究[J]. 中国铁道科学,2005,26(1):95-99.
HUANG Yun-hua, LI Fu, FU Mao-hai. Research on the Characteristics of Vehicle Buffers[J]. China Railway Science, 2005, 26(1): 95-99.
[10] 马卫华,宋荣荣,揭长安,等. 缓冲器阻抗特性对重载列车动力学性能的影响[J]. 交通运输工程学报, 2011, 11(2) :59-64.
MA Wei-hua, SONG Rong-rong, JIE Chang-an, et al. Influences of Buffer Impedance Characteristics on Dynamics Performances for Heavy Haul Train[J]. Journal of Traffic and Transportation Engineering, 2011, 11(2): 59-64.
[11] Chang Chongyi, Guo Gang, Wang Junbiao,et al. Study on longitudinal force simulation of heavy-haul train[J]. Vehicle System Dynamics ,2017,55(4): 571-582
[12] 孙树磊,丁军君,周张义等.重载列车纵向冲动动力学分析及试验研究[J].机械工程学报.2017,53(8):138-146.
SUN Shu-lei,DING Jun-jun,ZHOU Zhang-yi,et al. Analysis and Test of Heavy Haul Train Longitudinal Impulse Dynamics[J].Journal of Mechanical Engineering, 2017, 53(8): 138-146.
[13] 杨亮亮,罗世辉,傅茂海等.基于调车工况的车辆纵向冲击数值模拟研究[J].机械工程学报,2016,52(4):126-132.
YANG Liang-liang,LUO Shi-hui,FU Mao-hai,,et al.Numerical Simulation Study on Longitudinal Impact of Vehicle unde Shunting Condition[J].Journal of Mechanical Engineering, 2016,52(4): 126-132.
[14] 张渊,赵志鹏,王厂.长大货物车回送时混编列车纵向冲动分析[J].大连交通大学学报,2014,35(s1):22-27.
ZHANG Yuan, ZHAO Zhi-peng, WANG Chang.Analysis of Mixed Marshalling Train Longitudinal Impulse During Oversize Commodity Car Delivery[J].Journal of Dalian Jiaotong University, 2014,35(s1):22-27.
[15] 周光强,杨丽娜,杨爱军,等.弹性胶泥特性及其缓冲器的研究进展[J].有机硅材料,2011,25(1):40-43.
ZHOU Guang-qiang, YANG Li-na, YANG Ai-jun, et al. Research Progress on Characteristics of Elastic Rubber and its Buffer[J]. Silicone Material, 2011,25(1):40-43.
[16] 徐忠四,苏铁熊,刘晓栋.基于冲击环境下粘弹性胶泥缓冲器的动力学建模[J].应用力学学报,2013,30(3):384-389.
Xu Zhong-si,Su Tie-xiong,Liu Xiao-dong. Dynamics modeling of viscoelastic elastomer damper based on the shock environment[J]. Chinese journal of applied mechanics, 2013,30(3):384-389.
[17] 魏伟,赵旭宝,姜岩,等.列车空气制动与纵向动力学集成仿真[J]. 铁道学报,2012,34(4):39-46.
WEI Wei,ZHAO Xu-bao,JIANG Yan, et al. The Integrated Model of Train Air Brake and Longitudinal Dynamics[J]. Journal of the China Railway Society,2012,34(4):39-46.
[18] Wu Q, Spiryagin M, Cole C,et al.International benchmarking of longitudinal train dynamics simulators: results[J].Vehicle System Dynamics,2018,56(3):343 -365.
