In order to reduce the impact of switch rails on the safety of high speed train operation,a new type of high speed turnout switch structure was developed.The new type of switch removes the pointed rails from the existing structure and adopted a standard 60 kg/m track rail head section.One end of the switch track is fixed,and the other end can rotate left and right to achieve turning.Based on the theory of vehicle-turnout coupling dynamics,the models for standard No.18 turnout,new turnout,and single vehicle models for CRH2 type vehicles were establish.By comparing with standard turnouts,the safety of new turnouts when trains pass in the opposite direction was analyzed.The results show that compared with the standard turnout,when the train passes through the new turnout in the opposite direction,the derailment coefficient in the turnout area decreases from 0.49 to 0.32,which is a decrease of 34.69%,the peak wheel-rail lateral force decreases from 40.24 kN to 26.51 kN,which is a decrease of 34.12%,and the peak wheel-rail vertical force decreases from 90.71 kN to 84.66 kN,which is a decrease of 6.67%.The wheel load reduction rate of the new turnout shows a sudden change in the position of rail gap at the heel,and the switch area is still better than the standard turnout.
关键词
高速铁路/道岔/动力学仿真/新型转辙器/安全性评价/跟端轨缝
Key words
high speed railway/turnout/dynamic simulation/a new type of switch/safety evaluation/rail gap at the heel
维普
万方数据