Analysis And Simulation Of Metro Cab With Composite Material

With the country’s emphasis on the rail transit industry has increased year by year,China’s rail transit industry is entering a period of rapid development,and it also drives the improvement of the design and manufacturing technology of rail transit vehicles.Lightweight vehicle body structure is the important goal pursued in modern vehicle design and manufacturing process.The use of composite materials in train body and parts has become one of the research contents of experts,scholars and manufacturers at home and abroad.Firstly,this paper introduces the research background and significance of vehicle lightweight,explains the development of composite materials in the field of railway vehicles at home and abroad,and analyzes the research status of composite materials used in the driver’s cab.In this paper,two types of driver’s outdoor covers with carbon fiber laminate materials and carbon fiber-honeycomb aluminum sandwich materials are designed for the FRP driver’s outdoor cover of a certain type of subway.The finite element model of three materials was designed based on the finite element modeling software HyperMesh.Secondly,the OptiStruct solver is used to simulate the strength of the FRP cab,the carbon fiber cab and the carbon fiber-honeycomb driver’s cab,and compare the mechanical performance calculation results with each other.It was observed that the cab with three materials does not fail under seven working conditions,the failure factors and displacement values are compared.Compared with the metro cab cover made by glass-fiber panel at the same size,the weight of metro cab cover made by carbon-fiber panel decreased by 1 1.18%,the initial damage load increased by 74.49%,the specific initial damage load increased by 96.45%.Compared with the metro cab cover made by carbon-fiber panel,the weight of metro cab cover made by carbon-fiber aluminum-honeycomb sandwich structure decreased by 36.7%,the initial damage load decrease by 27.58%,the specific initial damage load increased by 7.94%.Finally,the collision performance software LS-dyna is used to analyze the collision performance of three composite driver’s outdoor covers.According to the European rail vehicle crashworthiness evaluation standard UIC651-2002,the collision results of the three types of composite driver’s outdoor hoods impacted by standard shape bullets at different speeds of 250 km/h were analyzed.The results show that the bullet body will not penetrate the cab of the three materials.The change of the speed of the bullet,the change of contact force and the displacement of the position of the driver’s cab were compared in the process of bullet impact on the three composite cabs,and the crashworthiness of the composite cab was checked.The research content of this paper has reference value for the lightweight design of subway driver’s cab.It is of great significance for the application of carbon fiber material and carbon fiber-honeycomb aluminum material for subway trains.