Abstract：The skirt board of the high-speed train equipment cabin plays an important role in improving the aerodynamic performance of the train. In addition to being subjected to vibration loads, the skirt board also bears a large aerodynamic load. As the operating speed continues to increase, the aerodynamic load borne by the skirt board becomes stronger and stronger. To ensure the normal operation of high-speed trains, fatigue assessment of the skirt board is particularly important. This article focuses on the non-steady-state vibration characteristics of the skirt board under the action of aerodynamic loads, using measured aerodynamic loads as input to obtain impulse response function (IRF) using finite element simulation, and using time-domain convolution integral method to calculate the acceleration at the acceleration measurement point. The model is verified by comparing with experimental data, and the comparison results show that the overall error is less than 10%. Then this method is used to calculate the dynamic stress of the concerned unit, and it is evaluated through the vibration fatigue strength analysis method. The evaluation results show that the fatigue strength of the skirt can meet the requirements of trains with speed of 400 km/h.
程亚军1,2，杨明智1，刘乐天3，于春洋2，李凡松3. 气动载荷下高速列车设备舱裙板非稳态振动疲劳强度研究[J]. 振动与冲击, 2024, 43(9): 36-42.
CHENG Yajun1,2, YANG Mingzhi1, LIU Letian3, YU Chunyang2, LI Fansong3. Non-stationary state vibration fatigue strength of high-speed train equipment compartment apron board under aerodynamic load. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(9): 36-42.
[1] 张永昌. 高速列车裙板气动载荷仿真识别及结构响应分析[D]. 北京: 北京交通大学, 2012.
Zhang Yongchang. Identification of Aerodynamic Load to Skirt Boards bySimulating and Analysis of Structures Response for aHigh-speed Train[D]. Beijing: Beijing Jiaotong University, 2012.
[2] 王金田, 盖杰, 余以正等. 高速列车设备舱裙板气动强度研究[J]. 大连交通大学学报, 2022, 43(2): 33-37.
Wang Jintian, Gai Jie, Yu Yizheng, et. al. Research on Aerodynamic Strength of Apron Board on High-Speed Train[J]. Journal of Dalian Jiaotong University, 2022, 43(2): 33-37.
[2] 陈友均. 列车裙板动力响应及疲劳寿命研究[D]. 成都: 西南交通大学, 2020.
Chen Youjun. Dynamic Response and Fatigue Life of Train Skirt[D]. Chengdu: Southwest Jiaotong University, 2020.
[4] Woods W A, Pope C W. Secondary aerodynamic effects in rail tunnels during vehicle entry[C]. //Proceedings of the Second International Symposium on the Aerodynamics and Ventilation of Vehicle Tunnels, 1976.
[5] 李凡松. 服役环境下动车组车体振动与疲劳研究[D]. 成都: 西南交通大学, 2017.
Li Fangsong. Research on Vibration and Fatigue of Carbody for
EMU under Service Environment[D]. Chengdu: Southwest Jiaotong University, 2017.
[6] 张嘉,邬平波,刘潮涛等. 基于6自由度振动试验台的轨道几何不平顺复现方法及应用研究[J].振动与冲击, 2022, 41(8): 45-54.
Zhang Jia, Wu Pingbo, Liu Chaotao, et. al. A track geometric irregularity reproduced method and its application based on 6DOF vibration test bench[J]. Journal of Vibration and Shock, 2022, 41(8): 45-54.
[7] 刘乐天, 李凡松, 宋烨等. 基于灵敏度分析的转向架构架有限元模型修正[J].振动与冲击, 2023, 42(3): 189-194.
Liu Letian, Li Fangsong, Song Ye, et. al. Finite Element Model Updating of Bogie Frame Based on Sensitivity Analysis[J]. Journal of Vibration and Shock, 2023, 42(3): 189-194.
[8] Matjaž Mršnik, Janko Slavič, Miha Boltežar. Vibration fatigue using modal decomposition[J]. Mechanical Systems and Signal Processing, 2018, 98.
[9] 朱帅康, 董龙雷, 官威等. 基于高斯混合模型的非高斯振动疲劳频域求解方法[J]. 振动与冲击, 2022, 41(16): 93-99.
Zhu Shuaikang, Dong Longlei, Guan Wei, et. al. Dynamic Fatigue Analysis of Trimmed Body Based onTime Domain and Frequency Domain Methods[J]. Journal of Vibration and Shock, 2022, 41(16): 93-99.
[10] 沙云东, 朱付磊, 赵奉同等. 薄壁结构高温随机振动疲劳寿命估算方法[J]. 振动与冲击, 2020, 39(2): 64-71.
Sha Yundong, Zhu Fulei, Zhao Fengtong, et. al. Ｒandom vibration fatigue estimation of thin plates in high temperature environment[J]. Journal of Vibration and Shock, 2020, 39(2): 64-71.
[11] Lorenzo Capponi, Martin Česnik,Janko Slavič, Filippo Cianetti, et. al. Non-stationarity index in vibration fatigue: Theoretical and experimental research[J]. International Journal of Fatigue, 2017, 104.
[12] Li Fansong, Wu Hao, Wu pingbo. Vibration fatigue dynamic stress simulation under non-stationary state[J]. Mechanical Systems and Signal Processing, 2021, 146.
[13] Česnik Martin,Slavič Janko. Vibrational Fatigue and Structural Dynamics for Harmonic and Random Loads[J]. Strojniški vestnik-Journal of Mechanical Engineering, 2015, 60(5).
[14] 李菁, 史成萌, 汪怡平等. 风-桥-隧路况下集装箱货车受侧风影响的非稳态气动特性及防护设计[J]. 武汉理工大学学报, 2019, 41(11): 62-68.
Li Jing, Shi Chengmeng, Wang Yiping, et. al. Unsteady Aerodynamic Performance of a Wagon Under Wind-bridge-tunnelRoad Condition Affected by Crosswind and Protection Design[J]. Journal of Wuhan University of Technology, 2019, 41(11): 62-68.
[15] 夏巍, 倪樵, 杨智春. 超声速飞行器壁板非线性颤振响应分析的时域法与频域法对比研究[J]. 固体力学学报, 2010, 31(4): 418-421.
Xia Wei, Ni Qiao, Wang Yiping. Compare of Time Domain Method with Frequency Domain Method in Nonlinear Flutter Analysis for Panels of Supersonic Airplane. Chinese Joural of Solid Mechanic, 2010, 31(4): 418-421.
