- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | DUAN Liang, SHI Huailong, SONG Chunyuan, LIN Jiazhi, CHEN Longfei, ZHANG Yaoxun. Study on Hydraulic Interconnected Damper and Dynamic Performance of High-Speed Electric Multiple Units[J].Journal of Southwest Jiaotong University.doi:10.3969/j.issn.0258-2724.20240511
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To address the inadequate anti-roll stiffness of the axle box in-board bogies of high-speed electric multiple units (EMUs), a primary suspension configuration was proposed to replace the traditional hydraulic damper with hydraulic interconnected units. The configuration could increase the anti-roll stiffness without increasing the vertical stiffness. Firstly, the equilibrium equations of oil pressure, flow rate, and output force were derived. A nonlinear dynamic model of the vehicle system was established using SIMPACK, and a simulation model of the hydraulic interconnected units was created in MATLAB/Simulink to facilitate co-simulation of the vehicle-hydraulic interconnected unit coupling system. Subsequently, the accuracy of the simulation model was validated based on the quasi-static characteristic test of the hydraulic interconnected units and the dynamic tests of the roller rig of the entire vehicle. The simulation analysis was conducted to ascertain the impact of pivotal parameters associated with the hydraulic interconnected units on the roll angle of the car body, derailment coefficient, and riding index for various operation conditions of vehicles. Finally, the field dynamic tests were conducted to verify the improvement in the dynamic performance of vehicles during curve negotiation. The results have shown that the roll stiffness of the interconnection unit is significantly greater than that of the traditional hydraulic dampers. The roll angle of the car body can be reduced by more than 0.5°, which is conducive to narrowing the dynamic limit and ensuring overturning safety. The field test results demonstrate that the dynamic indexes of hydraulic interconnected units are comparable to those of traditional oil pressure dampers. It is viable to address the issue of inadequate anti-roll capability of axle box in-board bogies by adopting hydraulic interconnected units.
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