| In the process of urbanization vigorously promoted by the state,the congestion of cities and the inability of the public transportation system to meet the travel needs have become a common problem that hinders the development of cities,seriously hindering the development of cities and improving the happiness of urban residents.Vigorously developing rail transit is an effective measure to solve urban traffic congestion.As a new type of rail transit,the suspended monorail has the advantages of small footprint,low engineering cost,good terrain adaptability,and high safety.At present,there are more or less problems with the bogies of the suspended monorail used at home and abroad,such as the problems of the bogies being too large and not compact.At the same time,as more and more cities begin to consider this new type of track In traffic,it is also very important to carry out the vehicle-axle coupled vibration analysis of the response.In this thesis,referring to the structure of suspended monorail bogies in Germany and Japan,combining their advantages and introducing the driving structure characteristics of Combino light rail vehicle produced by Siemens in Germany,a new type of suspended monorail vehicle bogie with compact structure is designed.The frame uses a motor to drive the two axles,and the guide and stabilizer wheels are installed on the gearbox to minimize the size of the bogie.In the research process,this thesis first established the three-dimensional model of the suspended monorail vehicle,and established the models of the straight track beam,the curved track beam and the bridge pier.simplification.The principle of spatial coupling between the relevant vehicle and the track beam is expounded,and the flexible body model of the track beam and the bridge pier is established by the fixed interface modal synthesis method,and then the corresponding simplified suspension monorail vehicle is established in UM(Universal Mechanism).Dynamic model,the flexible body is imported into the previous monorail vehicle dynamic model through the interface program of ANSYS-UM,the vehicle-bridge coupled vibration model is established,and the dynamic performance evaluation criteria for the straight and curved segments are established with reference to the relevant specifications.Finally,track beams with different spans and thicknesses of running rail steel plates are established respectively,and the influence of these two track beam parameters on the dynamic performance of suspended monorail vehicle is analyzed.Through the dynamic analysis of the suspended tram train,the following conclusions are obtained:(1)The running quality of the new type of suspended monorail designed in this thesis has reached excellent on straight lines and it also meets various safety indicators on curved lines.(2)The suspended monorail vehicle studied in this thesis is within the safety standard under the maximum operating speed,whether it is no-load condition or heavy-load condition;when the cross-wind condition passes a straight line,for the vertical index,it is within 7When the wind is strong,the vertical index of the suspended monorail vehicle will have a maximum value in the 7th wind;for the lateral index,with the increase of the wind speed,the indicators of the suspended monorail vehicle gradually increase;When the wind condition passes through the curve,when the wind effect reaches level 6,it is best for the vehicle to slow down and operate.When the wind reaches Category 7;it is best to stop the operation of the vehicle.(3)Among the four track beam spans,no-load and heavy-load each show a certain trend of change.On the whole,the dynamic response index when the span reaches 25 m is the best.It is said that after the thickness of the steel plate of the running rail reaches 32 mm,the continuous increase of the thickness of the steel plate has little effect on the dynamics of the suspended monorail,and with the continuous increase of the thickness of the steel plate,the mid-span deformation of the track beam also follows decrease. |
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