钢轮钢轨制式悬挂式PRT车辆动力学性能分析及优化OA

The suspended monorail system is crucial for urban transportation upgrading thanks to its strong terrain adaptability and high space utilization.However,traditional rubber-tired running systems suffer from tread temperature rise,severe wear,and lateral instability under high-speed conditions.Thus,it is difficult to maintain a high operating speed.To address these issues,this paper proposes a suspended PRT(Personal Rapid Transit)vehicle architecture based on symmetrical steel wheel-rail running system,introducing the mature metro steel wheel-rail technology into the suspended monorail system to systematically address the thermal failure,wear and lateral force imbalance associated with conventional rubber-tired and asymmetric steel wheel configurations.To verify the dynamic performance of the innovative architecture,a vehicle model is built based on the multi-body dynamics theory and the NSGA-II genetic algorithm is employed to optimize the running stability of the PRT vehicle.Results indicate the straight-line critical speed of the suspended PRT vehicle based on the steel wheel-rail system reaches 229 km/h,markedly higher than that of the rubber wheel system.The vehicle exhibits good curve negotiation performance and maintains excellent stability across the full speed range.Moreover,the car body roll angle is 4.5° and the vertical and lateral ride stability indices are reduced by 9.25％and 8.64％respectively at a speed of 60 km/h.