The stability and mechanical characteristics of heavy haul couplers with restoring bumpstop
The stability and mechanical characteristics of heavy haul couplers with restoring bumpstop
复制标题
带恢复缓冲装置的重载车钩的稳定性和机械特性
DOI：
10.1080/00423114.2013.849352
复制
发表时间：
2014-01
影响因子：
3.6
通讯作者：
Shihui Luo
中科院分区：
文献类型：
--
作者：
Yuan Yao;Xu Liu;Hongjun Zhang;Shihui Luo
为了研究一种带恢复缓冲器的重载耦合器的稳定性和力学特性，分析了在不同偏航角和纵向力作用下耦合器的几何形状和受力状态。总结了该耦合器的结构特点。为此，建立了包含4台重载机车和3个详细联轴器的多体动力学模型，对机车紧急制动过程进行了仿真。此外，为了研究相关参数对机车轮对侧向力的影响，还对联轴器偏航失稳和侧向力进行了测试。结果表明，只有当止震力超过联轴器纵向压缩力的一半时，从动件才能旋转，联轴器的偏航角才会增大。缓冲器预紧力是最重要的稳定因素。当联轴器自由角分别为7°、8°和9°时，联轴器纵向力小于临界值2000、1400和1150 kN时，联轴器在直线轨道上运行时横向力不变。在减小机车轮对侧向力方面，联轴器的自由角和机车的二次挡塞横向间隙是重要的。建议选择较小的机车二次侧悬刚度，自由间隙为35mm，与二次侧挡块的弹性间隙为15mm。如果联轴器的自由角小于在直线轨道上运行时的自稳定角5.5°，则无论纵向力多大，联轴器都是稳定的。当自由角为6°时，允许轮对侧向力在偶合器纵向力为2500kn处。这些研究对提高车钩的稳定性和重载机车与悬挂参数的匹配具有重要意义。
To investigate the stability and mechanical characteristics of a type of heavy haul coupler with restoring bumpstop, the geometry and force states of couplers were analysed at different yaw angles and the longitudinal forces. The structural characteristics of this coupler were summarised. To aid in the investigation, a multi-body dynamics model with four heavy haul locomotives and three detailed couplers was established to simulate the process of emergency braking. In addition, the coupler yaw instability and lateral forces were tested in order to investigate the effect of relevant parameters on the locomotive's wheelset lateral forces. The results show that only when the bumpstop force exceeds half of the coupler longitudinal compression force, can the follower be rotated and the yaw angle of the coupler increase. The bumpstop preload is the most important stabilising factor. The coupler lateral force is constant when the coupler longitudinal force is smaller than the critical values of 2000, 1400 and 1150 kN at coupler free angles of 7°, 8° and 9°, respectively, for operation on straight track. The coupler free angle and the locomotive's lateral clearance of the secondary stopper are important in decreasing the wheelset lateral forces of the locomotive. It is advised that a smaller locomotive's secondary lateral suspension stiffness, a free clearance of 35 mm and an elastic clearance of 15 mm from the secondary lateral stopper be selected. If the coupler's free angle is less than the self-stabilising angle which is 5.5° for operation on straight track, the coupler is stable no matter how great the longitudinal force is. The wheelset lateral forces are allowed at the coupler longitudinal force of 2500 kN when the free angle is 6°. These studies establish meaningful improvements for the stability of couplers and match the heavy haul locomotive with its suspension parameters.
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DOI：
10.1115/1.1541669
发表时间：
2003-03
影响因子：
1.7
作者：
M. Durali;Baabak Shadmehri
通讯作者：
M. Durali;Baabak Shadmehri
影响因子：
3.6
作者：
P. Belforte;F. Cheli;G. Diana;S. Melzi
通讯作者：
P. Belforte;F. Cheli;G. Diana;S. Melzi
影响因子：
--
作者：
Wei-hua Ma
通讯作者：
Wei-hua Ma
影响因子：
3.6
作者：
Pugi, Luca;Rindi, Andrea;Ignesti, Mirko
通讯作者：
Ignesti, Mirko
DOI：
--
发表时间：
2001
期刊：
--
影响因子：
--
作者：
C. Cole;M. McClanachan;D. Roach;Gerhard. Lesch;F. V. D. Westhuizen;Ted. McLeod
通讯作者：
C. Cole;M. McClanachan;D. Roach;Gerhard. Lesch;F. V. D. Westhuizen;Ted. McLeod