In order to explore the relationship between the bending frequency of flexible car body and the suspension parameters, this paper use the finite element method to analyze the frequency of car body, and then the formula which calculated the pith and bounce frequency of bogie is derived by simplifying the vertical dynamics model. Therefore, the formula of the ratio between the first-order bending frequency of car body and the pitch and bounce of bogie was established. Finally, the rigid-flexible coupling dynamics model was established. Through simulation analysis, it was found that the vertical amplitude of car body will increase and ride index will reduce while the first-order bending frequency of car body which reduced within a certain range is close to the vertical vibration frequency of the bogie, but the standard for vehicle dynamics performance requirements can still be met by selecting the appropriate suspension damping ratio. Although the vibration amplitude of the bogie may increase in a small range while a suspension damping ratio was selected, the vertical ride index of the vehicle will be significantly improved. The research results show that the frequency of the lightweight car body could no more than 10 Hz and no more than 1.4 times the pitch and bounce frequency of bogie while the suspension parameters was selected suitable.
Study on the Influence of Car Body Lightweight on Suspension Parameters
Second International Conference on Rail Transportation ; 2021 ; Chengdu, Sichuan Province, China
ICRT 2021 ; 378-389
2022-02-08
Aufsatz (Konferenz)
Elektronische Ressource
Englisch