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Passive control of railway vehicle car body flexural vibration by means of underframe dampers

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Abstract

To suppress vertical flexural vibration of a railway vehicle car body, a new passive control method by mounting dampers on the longitudinal beams of the car body underframe is proposed. The method is firstly studied by an Euler-Bernoulli beam model using Green’s functions, then it is further verified by a nonlinear dynamic model of the vehicle. Results show that the car body flexural vibration can be noticeably reduced by this method. It is better to mount the damper near the car body centre. The higher damping coefficient of the damper, the more effective in decreasing the car body first vertical bending vibration. The higher the rigidity of the damper bracket and rubber bush, the better performance of the damper. It is found that when mounting six dampers at proper positions, the damping coefficient of each damper is 1.33×107 N·s/m, even if the first vertical bending frequency of the studied car body is only 7.2 Hz, a very good ride quality will be achieved when the vehicle runs at 250 km/h.

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Authors and Affiliations

  1. Institute of Rail Transit, Tongji University, No. 4800, Cao An Road, Shanghai, 201804, China

    Dao Gong, Jinsong Zhou & Wenjing Sun

Authors
  1. Dao Gong
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  2. Jinsong Zhou
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  3. Wenjing Sun
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Corresponding author

Correspondence to Dao Gong.

Additional information

Recommended by Associate Editor Eung-Soo Shin

Dao Gong, born in 1985, is an Assistant Professor in Institute of Rail and Transit, Tongji University. He has been researching on railway vehicle vibration testing and control.

Jinsong Zhou, born in 1969, is a Professor in Institute of Rail and Transit, Tongji University. He has been researching on railway vehicle dynamics, modal parameter testing and control of vibration and sound of railway vehicles.

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Gong, D., Zhou, J. & Sun, W. Passive control of railway vehicle car body flexural vibration by means of underframe dampers. J Mech Sci Technol 31, 555–564 (2017). https://doi.org/10.1007/s12206-017-0108-2

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  • DOI: https://doi.org/10.1007/s12206-017-0108-2

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