Comparison and Optimization of Secondary Suspension Structure of High Speed EMS Vehicle

doi:10.3901/JME.2022.10.160

Abstract

Abstract: The dynamic model of high-speed EMS train is established considering the electromagnetic levitation system, the electro dynamic characteristics of the control system and the nonlinear characteristics of the suspension system. The secondary structure of traditional high-speed EMS train is complex and high cost with bolster, air spring and suspender. A new secondary suspension scheme using air spring which adapted to large displacement to support the car body directly and canceled the bolster is carried out exploratively. The secondary scheme of adding anti rolling bar without bolster is further studied. Based on the dynamics model of vehicle system, the vehicle dynamic performance under three kinds of secondary suspension is analyzed and compared aiming at the running stability and the performance of curve passing. The conclusions are as follows. The dynamic performance of the scheme with bolster are better than those without bolster. The lateral, vertical and roll angle displacements of the vehicle body with anti roll bar are reduced compared with the secondary suspension without anti roll, and reached the level of the scheme with bolster. The secondary suspension scheme without bolster adding anti roll bar is recommended to adopt in future structural design and carry out test verification which can simplify the structure of secondary suspension system and meet the requirements of dynamic peformance.

Key words: high speed EMS train, dynamic performance, secondary suspension system, structural optimization

CLC Number:

U270

CHEN Zhixian, LI Zhongji, YANG Jizhong, WU Xingwen, ZHOU Yongli. Comparison and Optimization of Secondary Suspension Structure of High Speed EMS Vehicle[J]. Journal of Mechanical Engineering, 2022, 58(10): 160-168,179.

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