The design of crashworthy subway vehicle and crash research of whole car-body

Based on the characteristics of railway vehicles,the crashworthy subway vehicle was designed.The design concept of crashworthy car-body was proposed and the energy-absorbing process of the head car impact was divided into four steps: the first step is the rubber buffer of the buffer equipment of vehicle coupler;the second is the buffer with collapsible tube;the third is the cut bolt of vehicle coupler;the fourth is the special energy-absorbing structures and the anti-climbers on the underframe of head car.Based on the research of the railway vehicles' crashworthy car-body the special energy-absorbing structures of large plastic deformation were used in the car-body structure design.The crash model of the head car was set up to conduct numerical calculations in some impacting cases.During the process of impacting,steady and ordered flexed plastic deformation occurs on the component from anticipative part,and only elastic deformation occurs on the passenger compartment of the car-body.A majority of the impacting kinetic energy(more than 80%) dissipates due to the plastic deformation of the components.Results show that the car-body has good crashworthy effect.