Aerodynamic Load Characteristics of Trains Exposed to Wind Velocity with Longitudinal and Lateral Components
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摘要:
为探索侧向环境风作用下列车气动载荷变化特性，对任意风向角下随车移动点处的风速纵、横分量进行建模，研究考虑风速纵、横分量的列车气动载荷计算方法，并分析在列车速度200～400 km/h、平均风速10～35 m/s及风向角30°～150° 时的列车气动载荷特性. 研究发现：在不同风向角下，考虑风速横向分量后，高速列车气动载荷波动变大，作用于列车上的瞬时气动载荷极值增大；风速横向分量主要影响列车气动载荷的标准差，且影响程度与风向角有关；随着风向角接近临界风向角，风速横向分量对列车气动载荷标准差的影响逐渐变小，随着风向角远离临界风向角，风速横向分量对列车气动载荷标准差的影响逐渐变大；列车气动载荷的标准差/均值主要与侧偏角有关，且在风向角为30° 及150° 时较大，其次是风向角60° 和120°，而在风向角90° 时则较小.
Abstract:To explore the aerodynamic load characteristics of trains under side wind environments, the model of the longitudinal and lateral components of wind velocity at a point moving with the train for any wind angle was set up. The computational method of aerodynamic loads of the train exposed to wind velocity with longitudinal and lateral components was studied. The aerodynamic load characteristics of the train at a speed of 200–400 km/h, mean wind speed of 10–35 m/s, and wind angle of 30°–150° were analyzed. The results show that under different wind angles, when the lateral component of wind velocity is considered, the aerodynamic load of high-speed trains fluctuates greatly, leading to an increase in the extreme value of instantaneous aerodynamic load acting on the train. The lateral component of wind velocity mainly affects the standard deviation of aerodynamic loads of the train, and the influence has much relationship with wind angle. The influence becomes smaller when the wind angle is closer to the critical wind angle and becomes larger when the wind angle is far away from the critical wind angle. Under different wind angles, the ratio of standard deviation to mean value of aerodynamic load of the train mainly depends on the yaw angle. The ratio is relatively large at wind angles of 30° and 150°, followed by wind angles of 60° and 120°, but it is relatively small at wind angles of 90°.
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图 5 模拟的随机风速无量纲功率谱与目标谱对比
Figure 5. Comparison of simulated stochastic wind velocity dimensionless power spectrum with target spectrum
图 7 侧力的均值及标准差随风向角的变化
Figure 7. Change of mean value and standard deviation of side force with wind angle
图 8 侧力标准差/均值随风向角的变化
Figure 8. Variation of ratio of standard deviation to mean value of side force with wind angle
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[1] LI T, DAI Z Y, YU M G, et al. Numerical investigation on the aerodynamic resistances of double-unit trains with different gap lengths[J]. Engineering Applications of Computational Fluid Mechanics, 2021, 15(1): 549-560. doi: 10.1080/19942060.2021.1895321 [2] 何佳骏,向活跃,龙俊廷,等. 桥隧过渡段高速列车行车抗风安全分析[J]. 西南交通大学学报,2021,56(5): 1056-1064.HE Jiajun, XIANG Huoyue, LONG Junting, et al. Wind-resistant safety analysis of high-speed trains in bridge-tunnel transition section[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1056-1064. [3] 王政,李田,张继业. 不同类型横风下高速列车气动性能研究[J]. 机械工程学报,2018,54(4): 203-211. doi: 10.3901/JME.2018.04.203WANG Zheng, LI Tian, ZHANG Jiye. Research on aerodynamic performance of high-speed train subjected to different types of crosswind[J]. Journal of Mechanical Engineering, 2018, 54(4): 203-211. doi: 10.3901/JME.2018.04.203 [4] GUO Z J, LIU T H, CHEN Z W, et al. Aerodynamic influences of bogie’s geometric complexity on high-speed trains under crosswind[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2020, 196: 104053.1-104053.12. [5] BAKER C J, STERLING M. The calculation of train stability in tornado winds[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2018, 176: 158-165. doi: 10.1016/j.jweia.2018.03.022 [6] LIU D R, MARITA TOMASINI G, ROCCHI D, et al. Correlation of car-body vibration and train overturning under strong wind conditions[J]. Mechanical Systems and Signal Processing, 2020, 142: 106743.1-106743.18. [7] LI T, QIN D, ZHANG J Y. Effect of RANS turbulence model on aerodynamic behavior of trains in crosswind[J]. Chinese Journal of Mechanical Engineering, 2019, 32: 85.1-85.12. doi: 10.1186/s10033-019-0402-2 [8] KRAJNOVIĆ S, RINGQVIST P, NAKADE K, et al. Large eddy simulation of the flow around a simplified train moving through a crosswind flow[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2012, 110: 86-99. doi: 10.1016/j.jweia.2012.07.001 [9] CHELI F, RIPAMONTI F, ROCCHI D, et al. Aerodynamic behaviour investigation of the new EMUV250 train to cross wind[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2010, 98(4/5): 189-201. [10] NETO J, MONTENEGRO P A, VALE C, et al. Evaluation of the train running safety under crosswinds - a numerical study on the influence of the wind speed and orientation considering the normative Chinese Hat Model[J]. International Journal of Rail Transportation, 2021, 9(3): 204-231. doi: 10.1080/23248378.2020.1780965 [11] MONTENEGRO P A, HELENO R, CARVALHO H, et al. A comparative study on the running safety of trains subjected to crosswinds simulated with different wind models[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2020, 207: 104398.1-104398.15. [12] 曹亚博,凌亮,邓永权,等. 强阵风环境下高速列车运行安全性研究[J]. 机械工程学报,2013,49(18): 30-37. doi: 10.3901/JME.2013.18.030CAO Yabo, LING Liang, DENG Yongquan, et al. Study on running safety of high-speed train under gust[J]. Journal of Mechanical Engineering, 2013, 49(18): 30-37. doi: 10.3901/JME.2013.18.030 [13] BAKER C J. The simulation of unsteady aerodynamic cross wind forces on trains[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2010, 98(2): 88-99. doi: 10.1016/j.jweia.2009.09.006 [14] YU M G, JIANG R C, ZHANG Q, et al. Crosswind stability evaluation of high-speed train using different wind models[J]. Chinese Journal of Mechanical Engineering, 2019, 32: 40.1-40.13. doi: 10.1186/s10033-018-0313-7 [15] TOMASINI G, CHELI F. Admittance function to evaluate aerodynamic loads on vehicles: experimental data and numerical model[J]. Journal of Fluids and Structures, 2013, 38: 92-106. doi: 10.1016/j.jfluidstructs.2012.12.009 [16] XU Y L, DING Q S. Interaction of railway vehicles with track in cross-winds[J]. Journal of Fluids and Structures, 2006, 22(3): 295-314. doi: 10.1016/j.jfluidstructs.2005.11.003 [17] CHELI F, CORRADI R, TOMASINI G. Crosswind action on rail vehicles: a methodology for the estimation of the characteristic wind curves[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2012, 104/105/106: 248-255. [18] COOPER R K. Atmospheric turbulence with respect to moving ground vehicles[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1984, 17(2): 215-238. doi: 10.1016/0167-6105(84)90057-6 [19] BAKER C. A framework for the consideration of the effects of crosswinds on trains[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2013, 123: 130-142. doi: 10.1016/j.jweia.2013.09.015 [20] 于梦阁,张骞,刘加利,等. 随机风环境下高速列车运行安全评估研究[J]. 机械工程学报,2018,54(4): 245-254. doi: 10.3901/JME.2018.04.245YU Mengge, ZHANG Qian, LIU Jiali, et al. Study on the operational safety evaluation of the high-speed train exposed to stochastic winds[J]. Journal of Mechanical Engineering, 2018, 54(4): 245-254. doi: 10.3901/JME.2018.04.245 [21] 于梦阁,刘大维,张继业,等. 二维随机风下高速列车非定常气动载荷研究[J]. 机械工程学报,2016,52(6): 108-115. doi: 10.3901/JME.2016.06.108YU Mengge, LIU Dawei, ZHANG Jiye, et al. Study on the unsteady aerodynamic loads of high-speed trains exposed to two-dimensional stochastic winds[J]. Journal of Mechanical Engineering, 2016, 52(6): 108-115. doi: 10.3901/JME.2016.06.108 [22] YU M G, ZHANG J Y, ZHANG K Y, et al. Study on the operational safety of high-speed trains exposed to stochastic winds[J]. Acta Mechanica Sinica, 2014, 30(3): 351-360. doi: 10.1007/s10409-014-0004-2 [23] British Standards Institution. Railway applications—aerodynamics part 6: requirements and test procedures for cross wind assessment: BS EN 14067-6[S]. Brussels: BSI, 2018. [24] 于梦阁,张继业,张卫华. 随机风作用下高速列车的非定常气动载荷[J]. 机械工程学报,2012,48(20): 116-123.YU Mengge, ZHANG Jiye, ZHANG Weihua. Unsteady aerodynamic loads of high-speed trains under stochastic winds[J]. Journal of Mechanical Engineering, 2012, 48(20): 116-123. -
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