Characteristic of dynamic interaction between wheel and rail due to wheel tread flat on heavy haul railway
-
摘要: 运用仿真分析手段, 考虑车轮踏面新、旧擦伤激扰, 研究了重载铁路轮轨相互作用力、轨道结构位移及振动加速度的时、频特征。研究结果表明: 在车轮踏面新擦伤作用下, 轮轨间将产生高频轮轨垂向力和低频轮轨垂向力, 钢轨、轨枕及道床将产生低频振动位移; 而对于车轮踏面旧擦伤, 轮轨间仅产生高频轮轨垂向力, 轨道结构部件的振动位移较小, 高频位移幅值略大于低频位移幅值; 在新、旧擦伤作用下, 钢轨垂向振动加速度的频率很高, 前者的道床振动加速度明显高于后者的值, 二者的轨枕振动加速度较接近。Abstract: The excitation effects of new and old wheel tread flats for heavy haul vehicle were considered, and the responses of wheel/rail forces, the displacements and accelerations of track in time and frequency domains were studied by simulation.The result shows that under the action of the new flat, there are a high-frequency wheel/rail vertical force and a low-frequency wheel/rail vertical force, and the frequencies of track displacements are low.Due to the old flat, there is a high-frequency wheel/rail vertical force only, the displacements of track are little, and the high-frequency displacement amplitude is lager than low-frequency displacement amplitude.Furthermore, the frequencies of vertical accelerations of rail due to both of the flats are high, the acceleration of the ballast due to the new flat is larger than that due to the old flat, and both of the characteristics of sleeper accelerations are similar.
-
[1] MAZILU T. A dynamic model for the impact between the wheel flat and rail[J]. Mechanical Engineering, 2007, 69 (2): 45-58. [2] 王其昌. 车轮扁疤冲击分析[J]. 西南交通大学学报, 1991, 26 (4): 45-48. https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT201404022.htmWANG Qi-chang. Analysis of impact influence of wheel tread flat spot on railway track[J]. Journal of Southwest Jiaotong University, 1991, 26 (4): 45-48. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT201404022.htm [3] 翟婉明. 车辆-轨道耦合动力学[M]. 第3版. 北京: 科学出版社, 2007.ZHAI Wan-ming. Vehicle-Track Coupled Dynamics[M]. 3rd Edition. Beijing: Science Publishing House, 2007. (in Chinese) [4] 王炎孝, 杨占平. 铁路车轮扁疤动态检测系统[J]. 铁道车辆, 2001, 39 (4): 30-32. https://www.cnki.com.cn/Article/CJFDTOTAL-TDCL200104011.htmWANG Yan-xiao, YANG Zhan-ping. Dynamic inspection system for wheel flat on railway wheel[J]. Rolling Stock, 2001, 39 (4): 30-32. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TDCL200104011.htm [5] 冯其波, 赵雁, 崔建英. 车轮踏面擦伤动态定量测量新方法[J]. 机械工程学报, 2002, 38 (2): 120-122. https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB200202027.htmFENG Qi-bo, ZHAO Yan, CUI Jian-ying. New dynamic method to quantitatively measure wheel flats of trains[J]. Chinese Journal of Mechanical Engineering, 2002, 38 (2): 120-122. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB200202027.htm [6] 杨新文, 翟婉明. 车轮扁疤激起的轮轨冲击噪声机理分析[J]. 振动与冲击, 2009, 28 (8): 46-49. doi: 10.3969/j.issn.1000-3835.2009.08.010YANG Xin-wen, ZHAI Wan-ming. Wheel/rail impact noise due to wheel flats[J]. Journal of Vibration and Shock, 2009, 28 (8): 46-49. (in Chinese) doi: 10.3969/j.issn.1000-3835.2009.08.010 [7] SANDSTROM J, EKBERG A. Predicting crack growth and risks of rail breaks due to wheel flat impacts in heavy haul operations[J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2009, 223 (2): 153-161. doi: 10.1243/09544097JRRT224 [8] STEENBERGEN M J M M. The role of the contact geometry in wheel-rail impact due to wheel flats: Part Ⅱ[J]. Vehicle System Dynamics, 2008, 46 (8): 713-737. [9] ZHAI W M, CAI C B, WANG Q C, et al. Dynamic effects of vehicles on tracks in the case of raising train speeds[J]. Proceedings of the Institution of Mechanical Engineers, Part F, Journal of Rail and Rapid Transit, 2001, 215 (2): 125-135. [10] NIELSEN J C O. High-frequency vertical wheel-rail contact forces-validation of a prediction model by field testing[J]. Wear, 2008, 265 (9/10): 1465-1471. -
下载:
点击查看大图
图(8)
计量
- 文章访问数: 639
- HTML全文浏览量: 118
- PDF下载量: 612
- 被引次数: 0
