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A platform for research: civil engineering, architecture and urbanism
Improving the Track Friendliness of a Four-Axle Railway Vehicle Using an Inertance-Integrated Lateral Primary Suspension
Improving the track friendliness of a railway vehicle can make a significant contribution to improving the overall cost effectiveness of the rail industry. Rail surface damage in curves can be reduced by using vehicles with a lower Primary Yaw Stiffness (PYS); however, a lower PYS can reduce high-speed stability and have a negative impact on ride comfort. Previous studies have shown that this trade-off between track friendliness and passenger comfort can be successfully combated by using an inerter in the primary suspension; however, these previous studies used simplified vehicle models, contact models, and track inputs. Considering a realistic four-axle passenger vehicle model, this paper investigates the extent to which the vehicle's PYS can be reduced with inertance-integrated primary lateral suspensions without increasing Root Mean Square (RMS) lateral accelerations when running over a 5km example track. The vehicle model, with inertance-integrated primary lateral suspensions, has been created in VAMPIRE, and the vehicle dynamics are captured over a range of vehicle velocities and wheel-rail equivalent conicities. Based on systematic optimisations using network-synthesis theory, several beneficial inertance-integrated configurations are identified. It is found that with such beneficial configurations, the PYS can be reduced by up to 47% compared to a base case vehicle, without increasing lateral RMS accelerations. This could result in a potential Network Rail Variable Usage Charge saving of 26%. With the beneficial inertance-integrated suspensions, further simulations are carried out to investigate the vehicle's performance in curve transitions and when subject to one-off peak lateral track irregularities.
Improving the Track Friendliness of a Four-Axle Railway Vehicle Using an Inertance-Integrated Lateral Primary Suspension
Improving the track friendliness of a railway vehicle can make a significant contribution to improving the overall cost effectiveness of the rail industry. Rail surface damage in curves can be reduced by using vehicles with a lower Primary Yaw Stiffness (PYS); however, a lower PYS can reduce high-speed stability and have a negative impact on ride comfort. Previous studies have shown that this trade-off between track friendliness and passenger comfort can be successfully combated by using an inerter in the primary suspension; however, these previous studies used simplified vehicle models, contact models, and track inputs. Considering a realistic four-axle passenger vehicle model, this paper investigates the extent to which the vehicle's PYS can be reduced with inertance-integrated primary lateral suspensions without increasing Root Mean Square (RMS) lateral accelerations when running over a 5km example track. The vehicle model, with inertance-integrated primary lateral suspensions, has been created in VAMPIRE, and the vehicle dynamics are captured over a range of vehicle velocities and wheel-rail equivalent conicities. Based on systematic optimisations using network-synthesis theory, several beneficial inertance-integrated configurations are identified. It is found that with such beneficial configurations, the PYS can be reduced by up to 47% compared to a base case vehicle, without increasing lateral RMS accelerations. This could result in a potential Network Rail Variable Usage Charge saving of 26%. With the beneficial inertance-integrated suspensions, further simulations are carried out to investigate the vehicle's performance in curve transitions and when subject to one-off peak lateral track irregularities.
Improving the Track Friendliness of a Four-Axle Railway Vehicle Using an Inertance-Integrated Lateral Primary Suspension
Lewis, Tim D (author) / Li, Yuan (author) / Tucker, Gareth (author) / Jiang, Jason Zheng (author) / Zhao, Yunshi (author) / Neild, Simon A (author) / Smith, Malcolm (author) / Goodall, Roger (author) / Dinmore, Neil (author)
2019-09-12
Lewis , T D , Li , Y , Tucker , G , Jiang , J Z , Zhao , Y , Neild , S A , Smith , M , Goodall , R & Dinmore , N 2019 , ' Improving the Track Friendliness of a Four-Axle Railway Vehicle Using an Inertance-Integrated Lateral Primary Suspension ' , Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility . https://doi.org/10.1080/00423114.2019.1664752
Article (Journal)
Electronic Resource
English
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