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ZHU Tao, LEI Cheng, XIAO Shou-ne, YU Jin-peng. Suspension stiffness selecting method of elastic suspension equipment under vehicle[J]. Journal of Traffic and Transportation Engineering, 2018, 18(5): 111-118. doi: 10.19818/j.cnki.1671-1637.2018.05.011
Citation: ZHU Tao, LEI Cheng, XIAO Shou-ne, YU Jin-peng. Suspension stiffness selecting method of elastic suspension equipment under vehicle[J]. Journal of Traffic and Transportation Engineering, 2018, 18(5): 111-118. doi: 10.19818/j.cnki.1671-1637.2018.05.011
shu

Suspension stiffness selecting method of elastic suspension equipment under vehicle

doi: 10.19818/j.cnki.1671-1637.2018.05.011
  • 1.

    State Key Laboratory of Traction Power,Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • 2.

    School of Rolling Stock,Zhengzhou Railway Vocational and Technical College, Zhengzhou 451460, Henan, China

  • 3.

    Product Technology Research Center,CRRC Tangshan Co.,Ltd., Tangshan 063035, Hebei, China

More Information
  • Author Bio:

    ZHU Tao(1984-),male,associate professor,PhD,zhutao034@swjtu.cn

  • Received Date: 2018-04-22
  • Publish Date: 2018-10-25
    Abstract
  • Taking the low-order elastic vibration, the rigid body vibration and the equipment active vibration of carbody as inputs, a method for rapidly and simply determining the suspension stiffness of elastic equipment was proposed.Under the premise of fully considering the coupling vibration that may occur in all directions, equipment installation clearance, the maximum allowable vibration displacement of suspension equipment and other factors, the formula for calculating the rigid body vibration frequency of suspended equipment with arbitrary suspension method was derived.The selection method and analysis process of suspension stiffness of elastic suspension equipment under vehicle were given.Taking a certain electric multiple unit (EMU) as an example, the coupled vibration analysis model of carbody and power pack was established.The ranges of rigid body vibration frequencies of nodding, shaking, floating and sinking, lateralrolling, and three-dimensional suspension stiffnesses of power pack were calculated, and the theoretical calculation results of suspension stiffness of power pack were compared with corresponding finite element results.Research result shows that under the premise that the basic parameters of carbody or suspension equipment are known, the proposed method can calculate the rigid body vibration frequencies of nodding, shaking, floating and sinking, and lateral rolling, without complicated dynamic modeling and analysis. Comparing with the finite element calculation result, the maximum relative error in rigid body vibration frequency is 6.88%.All the calculated frequency ratios between rigid body vibration frequencies of power pack and corresponding vibration frequencies of carbody can effectively avoid the coupling interval[0.750, 1.414].Therefore, the stiffness of elastic suspension equipment under vehicle calculated by the proposed method can quickly and accurately determine the stiffness rang of suspension equipment, so as to avoid the resonance between equipment and carbody.

     

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