Modeling Of Rail-road Intermodal Railway Vehicle And Dynamic Performance Research

With the development of China’s economy,railway transportation capacity is constantly being challenged.In order to achieve high-efficiency and low-cost transportation,the development of multi-functional transportation of Rail-road Intermodal becomes inevitable.The Rail-road Intermodal transportation combines the advantages of both railway and highway transportation,and has obvious advantages in Cargo transportation,transportation efficiency,safety and other aspects.It is an important development direction for China’s cargo transportation in the future.In this thesis,the Rail-road Intermodal vehicle is taken as the research object,and its modeling and simulation analysis are carried out to study the dynamic performance and influencing factors of the Rail-road Intermodal vehicle.At first,the basic theory of the multi-body dynamic system is expounded in this thesis,the dynamics of the rigid-flexible coupling and the liquid-solid coupling system are introduced,and research methods considering the elastic contact of the tire are considered.Secondly,the rigid-flexible coupling model of the Rail-road Intermodal railway vehicle considering the car body flexibility was established by analyzing car body finite element model and sub-structure.Besides,an equivalent model considering liquid sloshing and a coupling model of tire elastic contact are established based on the theoretical methods of multi-body system dynamics and liquid-solid coupling system dynamics.Thus,a multi-body coupling system model of a Railroad Intermodal vehicle is formed,which provides a foundation for the comprehensive and accurate dynamic performance analysis of Rail-road Intermodal railway vehicles.In the analysis of multi-body system dynamics performance,the vibration response and vibration transmission of the Rail-road Intermodal vehicle are studied and analyzed,based on the vibration theory and characteristics.The dynamic performance of the Rail-road Intermodal railway vehicle was simulated and calculated.And the influence of the vehicle body elasticity on the running stability,curve negotiating performance and riding quality was compared and analyzed.It is concluded that the rigid-flexible coupling has a greater influence on the dynamic performance of the vehicle.And it is necessary to consider the flexibility of the vehicle body when modeling to reach more accurate simulation analysis.This thesis focuses on considering the influence of the tire elasticity and liquid sloshing effect on the vibration performance of the Rail-road Intermodal vehicle,based on the model of the multi-state coupling system of the Rail-road Intermodal.The influence of liquid sloshing on the dynamic performance of vehicle system was discussed,and it is concluded that the liquid sloshing deteriorates the dynamic performance of the vehicle.The effects of tire elasticity on the vibration performance of Rail-road Intermodal vehicle are also analyzed,which shows that the tire elasticity has little effect on vehicle vibration performance.