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摘要: 为了提高直线电机轮轨交通车辆运行的安全性与乘坐舒适性, 分析了车轨结构特征, 建立了直线电机车辆/板式轨道横、垂向动力学模型。通过三角级数法得到轨道随机不平顺的时间序列, 以其作为系统激励, 分析了直线电机车辆与轨道的随机振动特性。把轨道不平顺描述为余弦函数, 研究了高低不平顺与方向不平顺的波长和幅值对系统动力响应的影响规律。计算结果表明: 磁轨气隙变化的频率主要集中在1.2~2.0Hz范围内, 波长小于10m的高低和方向不平顺对系统轮轨作用力、脱轨系数及轮重减载率等影响显著增大, 应予以重点控制。Abstract: In order to improve the safety and riding comfort of linear metro vehicle, the structural characteristics of vehicle/track system was analyzed, and a dynamics vertical-lateral vehicle/slab track coupling model was developed.The random vibration characteristics of vehicle and track excited by track random irregularities were investigated, in which the time domain samples of track random irregularities were simulated by using trigonometry series.Track vertical and alignment irregularities were expressed as harmonic cosine forms, and the effect rules of their wave amplitudes and wavelengthes on the dynamic responses of the system were studied.The result indicates that the frequency distributions of air gap variation are mainly in low frequency field, ranging from 1.2 to 2.0 Hz; when the wavelengthes of track vertical and alignment irregularities are shorter than 10 m, the affect of the irregularities on wheel/rail interacting force, derailment coefficient and the reduction rate of wheel load is dramatical, which should be controlled seriously.
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图 1 直线电机车辆-板式轨道动力学模型
Figure 1. Dynamics model of linear metro vehicle and slab track system
图 2 随机不平顺激励下系统动力响应
Figure 2. Dynamic responses of vehicle-track system under random irregularities
图 3 高低不平顺波长对系统动力响应的影响
Figure 3. Wavelength effect of track vertical profile irregularity on dynamic responses of vehicle-track system
图 4 高低不平顺幅值对系统动力响应的影响
Figure 4. Wave amplitude effect of track vertical profile irregularity on dynamic responses of vehicle-track system
图 5 方向不平顺波长对系统动力响应的影响
Figure 5. Wavelength effect of track alignment irregularity on dynamic responses of vehicle-track system
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[1] 魏庆朝, 冯雅薇, 施翃. 直线电机交通模式及技术经济特性[J]. 都市快轨交通, 2004, 17(1): 48-53.Wei Qing-chao, Feng Ya-wei, Shi Hong. Modes and technical-economic features of linear-motor driven transit systems[J]. Urban Rapid Rail Transit, 2004, 17(1): 48-53. (in Chinese) [2] Gieras J F. Light rail systems with linear induction motors[J]. Elektron, 1996, 13(1): 13-15. [3] Wallace A K. Function of the reaction rail in the development of a LIM propulsion systemfor urban transit[J]. Transactions on Industry Applications, 1984, 20(4): 942-947. [4] Tsuyoshi H, Sakutaro N, Masahiro A. On the design of high-efficiency linear induction motors for linear metro[J]. Electrical Engineeringin Japan, 2001, 137(2): 36-43. [5] Fatemi MJ, Green MF, Campbell TI. Dynamic analysis of resilient crosstie track for transit system[J]. Journal of Transportation Engineering, 1996, 122(2): 173-180. [6] 时瑾, 魏庆朝, 万传风. 直线电机地铁线路设计关键技术[J]. 中国铁道科学, 2004, 25(2): 130-133.Shi Jin, Wei Qing-chao, Wan Chuan-feng. Key technology of linear motor metro track design[J]. China Rail way Science, 2004, 25(2): 130-133. (in Chinese) [7] 冯雅薇, 魏庆朝, 高亮, 等. 直线电机地铁车轨系统动力响应分析[J]. 工程力学, 2006, 23(12): 159-164.Feng Ya-wei, Wei Qing-chao, Gao Liang, et al. Dynamic analysis on vehicle-track interaction of linear metro system[J]. Engineering Mechanics, 2006, 23(12): 159-164. (in Chinese) [8] 李芾, 傅茂海, 黄运华. 车辆径向转向架发展及其动力学特性[J]. 交通运输工程学报, 2003, 3(1): 1-6.Li Fu, Fu Mao-hai, Huang Yun-hua. Development and dynamic characteristics of radial bogies[J]. Journal of Traffic and Transportation Engineering, 2003, 3(1): 1-6. (in Chinese) [9] 王开文. 车轮接触点迹线及轮对接触几何参数的计算[J]. 西南交通大学学报, 1984, 19(1): 89-98.Wang Kai-wen. Trochoid of wheel contact point and calculation on geometry parameter of wheel/rail contact point[J]. Journal of Southwest Jiaotong University, 1984, 19(1): 89-98. (in Chinese) [10] 陈果. 车辆-轨道耦合系统随机振动分析[D]. 成都: 西南交通大学, 2000. [11] 蔡成标, 翟婉明, 王其昌. 轨道几何不平顺安全限值的研究[J]. 铁道学报, 1995, 17(4): 82-87.Cai Cheng-biao, Zhai Wan-ming, Wang Qi-chang. Study on allowable safety criterion of track geometric irregularities[J]. Journal of the China Rail way Society, 1995, 17(4): 82-87. (in Chinese) [12] 李成辉. 高低不平顺不利波长及其与车速关系[J]. 西南交通大学学报, 1997, 32(6): 633-636.Li Cheng-hui. Relationship between irregular wavelength of tracks and vehicle speed[J]. Journal of Southwest Jiaotong University, 1997, 32(6): 633-636. (in Chinese) -
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