Dynamics modelling of positioning rubber joint of a bogie based on physical parameters

LIU Shi-hui; SHI Huai-long; WANG Wei; LIU Hong-tao; TAN Fu-xing

doi:10.19818/j.cnki.1671-1637.2019.06.009

Volume 19 Issue 6

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LIU Shi-hui, SHI Huai-long, WANG Wei, LIU Hong-tao, TAN Fu-xing. Dynamics modelling of positioning rubber joint of a bogie based on physical parameters[J]. Journal of Traffic and Transportation Engineering, 2019, 19(6): 91-100. doi: 10.19818/j.cnki.1671-1637.2019.06.009

Citation:

LIU Shi-hui, SHI Huai-long, WANG Wei, LIU Hong-tao, TAN Fu-xing. Dynamics modelling of positioning rubber joint of a bogie based on physical parameters[J]. Journal of Traffic and Transportation Engineering, 2019, 19(6): 91-100. doi: 10.19818/j.cnki.1671-1637.2019.06.009

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Dynamics modelling of positioning rubber joint of a bogie based on physical parameters

doi: 10.19818/j.cnki.1671-1637.2019.06.009

1.
CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062, Jilin, China
2.
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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Author Bio:
LIU Shi-hui(1988-), female, engineer, liushihui@cccar.com.cn

SHI Huai-long(1986-), male, assistant professor, PhD, shi@swjtu.edu.cn
Received Date: 2019-04-27
Publish Date: 2019-12-25

Abstract

Abstract

Aiming at the elastic rubber components in the suspension system of a high-speed train bogie, the nonlinear dynamics modelling method for the rubber component was studied based on the physical parameters. In order to accurately simulate the correlations between the nonlinear stiffness and the damping hardness, structural dimensions, excitation frequency and excitation displacement amplitude, the Mooney-Rivlin rubber constitutive model in the software ABAQUS was used to characterize the correlation between the rubber component's stiffness and the structural dimensions and rubber hardness. A dynamics model, including a fractional derivative damping force element, a friction force element, and a spring force element, was used to characterize the frequency-dependency and amplitude-dependency of stiffness and damping of a rubber component. The least squares method was used to identify the model parameters based on the lab tests. The nonlinear characteristics of rubber bearing and positioning rubber joint were numerically simulated and tested in the lab to validate the proposed model. The vehicle dynamics performance analysis was performed by using an user-coded force element defined in the software SIMPACK, and the finite element model was used to provide the basic model parameters for the dynamics model. Analysis result shows that the stiffnesses of rubber bearing and positioning rubber joint are basically proportional to the Shore hardness of rubber material, and the stiffness corresponding to the hardness of 80 HA is about twice that at 60 HA. The less the rubber material in the direction of load action, the greater the stiffness in the corresponding direction. The axial and radial stiffnesses of rubber bearing are decoupled, which is affected by the height and the size of inner and outer diameters, respectively, and the decrease rate of the axial stiffness of rubber bearing with the increase of height is 0.2-0.6 MN·m^-1·mm^-1. Both the axial and radial stiffness of positioning rubber joint varies with the change of mandrel size, and the increase rate of radial stiffness with the increase of inner diameter is 3.1-5.2 MN·m^-1·mm^-1. The vehicle dynamics simulation results by using the nonlinear rubber component dynamics model are 20% different from the results by using a conventional equivalent force element model, which means the nonlinearities of dynamics parameters of the rubber bearing and positioning rubber joint have severe influence on the vehicle dynamics.
- vehicle engineering,
- vehicle dynamics,
- bogie,
- rubber component,
- dynamic characteristic,
- nonlinear,
- dynamics simulation

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References

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Dynamics modelling of positioning rubber joint of a bogie based on physical parameters

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