Study on the Optimization of Bending Frequencies of Railway Vehicle Car Body

Abstract:

Applying light structure of railway vehicle car body is the effective way to reduce energy consumption and the dynamic forces between rail and wheel. However, light structure will directly reduce the modal frequency of car body and thus increases the possibility of resonant vibration. It is known that increasing the modal frequency of a fully-equipped car body through structure optimization is barely effective. In this paper, three equations to evaluate the bending frequency of a fully-equipped car body are proposed firstly, then an effective way to enhance the bending frequency of a fully-equipped car body is presented, i.e. elastically suspended the equipment under car body chassis. Also the relations between the suspended mass and the bending frequency are given and validated by means of finite element analysis (FEA).

• Periodical: Applied Mechanics and Materials (Volumes 543-547)
• Pages: 303-306
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.543-547.303
• Online since: March 2014
• Authors: Hua Chen Hu, Dao Gong*
• Keywords: Car Body Structure, Fully-Equipped Condition, Modal Frequency, Suspending Equipment

References

[1] Zhou Jinsong. Railway Vehicle Vibration and Control [M]. Beijing: China railway publishing house, 2012. In Chinese.

[2] Zhou Jinsong, Sun Wenjing, Gong Dao. Analysis on Geometric Filtering Phenomenon and Flexible Car Body Resonant Vibraton of Railway Vehicles Journal of Tongji University(Natural Science), 2009, 37(12): 1653-1657. In Chinese.

[3] Gong Dao. Study on Flexible Vibration and Control of Car Body for a High-Speed Railway Train [Doctor degree paper]. Shanghai: Tongji University, 2012. In Chinese.

[4] Zhang Wei. Influences of under-chassis suspended equipments on ride quality of high-speed railway trains [Master degree paper]. Shanghai: Tongji University, 2011. In Chinese.

[5] Xu Guoliang. The development of power-distributed EMUs in China. Chinese Railways, 2002(2): 57-59. In Chinese.

[6] Li Chun-yang. Probe into development trend of high speed EMUs and applications in China. Electric drive for locmotives, 2003(5): 15-18. In Chinese.

[7] Yi Peng. Carbody structure design of the aluminum alloy a-type metro vehicle [Master degree paper]. Shanghai: Tongji University, 2010. In Chinese.

[8] Gong Dao, Zhou Jin-song, Sun Wen-jing, Gu Yue-jia. Impacts of hanging equipments on vertical riding stability of elastic high-speed train bodies. Chinese journal of construction machinery, 2011, 9(4): 404-409. In Chinese.