Research On Dynamics Simulation Of Suspended Monorail Single Motor Dual-axle Drive Bogie Vehicle

Suspended monorail transit has the characteristics of low cost,short construction period and small floor area.It is very suitable for small and medium-sized cities with low public transport construction budget.Even in large cities,it can also be used as supplementary traffic for congested lines.China’s suspended monorail transit system is still in the research stage,there is no operating line.The design of a new type of suspension monorail vehicle bogie is helpful to add new ideas for domestic research.At the same time,the relevant research of domestic suspension monorail transportation does not involve the sensitive wavelength of vehicle irregularity,nor does it study the dynamic performance of vehicle passing through turnout.In order to solve these problems,this paper combines the advantages of Chiba air rail bogies in Japan and HBahn bogies in Germany,introduces the driving structure characteristics of Combino light rail vehicle produced by Siemens in Germany,and designs a bogie with motor placed in the central position of the frame,both ends output torque at the same time,and only one motor is needed to drive the front and rear wheel sets.In the research process,this paper first uses Creo software to establish the three-dimensional model of the bogie and vehicle,and then carries on the force analysis of the vehicle and bogie,and establishes a simplified dynamic model.Then,the dynamic simulation model is established by using UM(universal mechanism)software,and the dynamic performance evaluation standard of suspension monorail vehicle on straight line and curve line is established by referring to GB5599-2019《Specification for dynamic performance assessment and testing verification of rolling stock》.Then,the influence of track irregularity wavelength in different directions on the dynamic performance of suspended monorail vehicle is analyzed,and the range of irregularity sensitive wavelength is determined.Finally,different track excitation modes are used to simulate the turnout structure for different turnout structures,and the turnout trafficability of suspension monorail vehicles is analyzed in detail.Through the dynamic analysis of the suspended monorail vehicle,the following conclusions are obtained:1.the running quality of the suspension monorail single motor double axles drive bogie vehicle designed in this paper has reached a good level on the straight line,and all the safety indexes are met on the curve line.2.The suspension monorail vehicle studied in this paper can operate safely under the wind force of level 8 or below.When the wind force reaches level 9,the maximum roll angle of the vehicle body exceeds the safety limit,and the vehicle needs to stop operation.3.For the suspension monorail vehicle running at the speed of 50km/h,the sensitive wavelength range of vertical irregularity and transverse irregularity on the straight line is 3～6m and 10～20m,and the sensitive wavelength range of vertical irregularity and transverse irregularity on the curve line with radius of 200 m is 10～20m.4.According to the dynamic simulation results,the mobile turnout designed in this paper can not meet the safety performance requirements of the suspension monorail vehicle.The inverted T-shaped frog turnout designed in this paper needs to add a guide rail surface compensation device,so that the suspended monorail vehicle can safely pass through the turnout with 50 m radius structure at the speed of 15km/h.