FENG Danian, DING Changquan, ZHANG Jianquan, et al. Research on vibration sources of straddle monorail vehicles based on wavelet theory[J]. Electric drive for locomotives,2024(3): 19-27.
FENG Danian, DING Changquan, ZHANG Jianquan, et al. Research on vibration sources of straddle monorail vehicles based on wavelet theory[J]. Electric drive for locomotives,2024(3): 19-27.DOI:10.13890/j.issn.1000-128X.2024.01.137.
Research on vibration sources of straddle monorail vehicles based on wavelet theory
Track irregularities are the main excitation source of vibration of straddle monorail vehicles. It is of great significance to study the vibration source of straddle monorail vehicles for vehicle and track beam maintenance. A dynamics model of straddle monorail vehicles was established based on SIMPACK multi-body dynamics software. Continuous wavelet transform was carried out on the time-domain signals of frame acceleration and irregularity signals
and time-frequency analysis was carried out with the continuous wavelet transform coefficient serving as the index to determine the frequency band where the energy of vehicle vibration and irregularity signals was mainly concentrated. Cross wavelet transform and wavelet coherence method were used to study the wavelet correlation of acceleration signals in time domain under multiple working conditions
and the average wavelet coherence value was used to evaluate the contribution of track beam irregularities to lateral and vertical vibration of vehicles. The results show that as for the guide surface irregularity
the transverse mean wavelet coherence peak values are 0.93
0.71 and 0.66 at 0.5 Hz
2 Hz and 14 Hz respectively
and the vertical mean wavelet coherence values fluctuate around 0.3. As for the stable surface irregularity
at 6 Hz
the transverse mean wavelet coherence peak value is 0.44
and the vertical mean wavelet coherence value fluctuates around 0.3. As for the running surface irregularity
at 6 Hz
the transverse mean wavelet coherence peak value is 0.53
and the vertical mean wavelet coherence value is stable at 0.98. As for the irregularity caused by overall track beam deformation
the transverse mean wavelet coherence peak value at 14 Hz is 0.41
and the vertical mean wavelet coherence peak value at 2 Hz is 0.47.
GUO Fengqi, CHEN Keyuan, GU Fagen, et al. Reviews on current situation and development of straddle-type monorail tour transit system in China[J]. Journal of central south university (science and technology), 2021, 52(12): 4540-4551.
BAO Yulong, LI Yongle, DING Jiajie. A case study of dynamic response analysis and safety assessment for a suspended monorail system[J]. International journal of environmental research and public health, 2016, 13(11): 1121.
LI Guangjun, JIN Weidong, CHEN Chunjun. Research about relationship between train's lateral vibration and track irregularity input[J]. Application research of computers, 2013, 30(11): 3261-3264.
RAO Nanzhi. Analysis of the influence of track irregularity on lateral vibration of vehicles in 200 km/h speed-up line[J]. Railway engineering, 2015(3): 126-129.
YUAN Xuancheng, WANG Kaiyun, GE Xin, et al. Influences of track irregularity wavelength and amplitude on dynamic performance of high-speed EMU[J]. Journal of transport information and safety, 2018, 36(2): 1-9.
JIANG Bo. Correlation analysis of Random Vibration track Irregularity in straddle monorail system[J]. Construction materials & decoration, 2018(25): 248-250.
GUO Fengqi, WANG Pengjiao. Measurement and analysis of the longitudinal level irregularity of the track beam in monorail tour-transit systems[J]. Scientific reports, 2022, 12(1): 19219.
DU Zixue, LI Yunchuan, LIANG Zhihua, et al. Research on curve through safety of straddle-type monorail vehicle[J]. Electric drive for locomotives, 2016(1): 79-83.
LU Haiying, WANG Wenhua, REN Lihui, et al. A straddling monorail train scheme with coupled bogie and its dynamics performance[J]. Electric drive for locomotives, 2019(5): 100-104.
SHEN Longjiang, ZHANG Jianquan. Analysis of mechanical property of straddle monorail vehicle based on tyre[J]. Electric drive for locomotives, 2019(4): 22-26.
严隽耄. 车辆工程[M]. 北京: 中国铁道出版社, 1992.
YAN Juanmao. Vehicle engineering[M]. Beijing: China Railway Publishing House, 1992.
马继兵. 跨座式单轨交通系统结构静动力行为研究[D]. 成都: 西南交通大学, 2008.
MA Jibing. Research on structural static and dynamics behaviors of straddle-type monorail transportation system[D]. Chengdu: Southwest Jiaotong University, 2008.
DENG Shengjie. Analysis of vehicle-bridge coupling vibration and fatigue reliability of straddle monorail steel-concrete composite bridges[D]. Guangzhou: Guangzhou University, 2023.
LI Xiaozhen, GE Yanlong, JIN Zhibin, et al. Influence of track beam's dynamic behavior on running performance of straddle-type monorail vehicle[J]. Journal of railway science and engineering, 2018, 15(12): 3225-3231.
郑凯锋. 跨座式单轨车辆动力学仿真分析与优化[D]. 重庆: 重庆交通大学, 2010.
ZHENG Kaifeng. Simulation analysis and optimization on dynamics performance of straddle-type monorail vehicle[D]. Chongqing: Chongqing Jiaotong University, 2010.
LUO Guangkun. A study on Morlet wavelet transform theory and application with software implementation[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2007.