A study on the optimum design of high-speed low-floor bogie with independently rotating wheels

作者：Jeong Nak Tak; Choi Sung Uk; Lee Ho Yong^*; Baek Keon Hee; Han Seok Youn; Kim Won Kyong; Suh Myung Won

来源：Journal of Mechanical Science and Technology, 2017, 31(5): 2105-2115.

DOI：10.1007/s12206-017-0407-7

• Low-floor tram
• Independently rotating wheels
• Active steering system
• Multibody dynamics
• Design of experiments

The low-floor bogie is a prior technology in countries and companies that want to develop the tram. The Low-floor tram (LFT), which includes low-floor bogies, is easy to embark and disembark because of the low floor height. In addition, it can be driven on urban as well as rural tracks. Furthermore, emissions such as NOx and SOx can be reduced. Due to these advantages, this innovative technology is expected to change the public transport system. To improve utilization in a downtown area, the technology for the low-floor bogie should satisfy conditions of a high-speed of over 80 km/h and minimum radius within a 25 mR curve for smooth running on a track that has a severe turning radius. Moreover, the wheelset should not be located in the bogie, and the components inside the bogie need to be well-arranged to satisfy the full low-floor condition. In this study, to develop an over-80 km/h class high-speed low-floor bogie that can be driven safely on a 25 mR curved track, a conceptual design of the LFT multibody dynamics model was constructed and dynamic characteristics were assessed by dynamic analysis. The modeling modification with Independently rotating wheels (IRW) needed to steer actively through semi-active suspension and the optimization using Design of experiments (DOE) were then performed. Through DOE method, the optimum combination of design parameters could be obtained and, the driving performances such as ride stability, comfort and safety of the LFT could then be improved about 7 %. The results of this work are available to detail design and development of LFT.

• 出版日期2017-5