道岔区敷设橡胶弹簧浮置板轨道的动力仿真分析OA北大核心

The problem of excessive vibration caused by the severe wheel-rail impact in turnout area is very prominent.Because of good elasticity and damping characteristics,rubber spring can effectively play an isolating function,and the cost is lower than steel spring.Therefore,laying rubber spring floating slab track in turnout area provides an effective way to solve the problem of excessive vibration.In order to study the feasibility of laying rubber spring floating slab track in turnout area,a rigid-flexible coupling model of vehicle-turnout-floating slab and an environmental vibration calculation model are established based on the vehicle-track coupled dynamics theory and the finite element analysis theory.Compared with the existing studies,this paper not only analyzes safety indicators,stability indicators,and track structure deformation indicators when the subway train passes through the No.9 turnout in a straight/side reverse direction,but also calculates the vibration reduction effect of laying rubber-spring floating slab tracks in the No.9 turnout area.Through the calculation,the following conclusions can be drawn:When the subway train passes through the No.9 turnout area with rubber spring floating slab in straight/side reverse direction,the maximum vertical and lateral force of wheel and rail and derailment coefficient are 166 kN,30 kN and 0.4 respectively,which are within the scope allowed by relevant technical standards,and can ensure the safe operation of the train.The maximum values of vertical acceleration,lateral acceleration of the train body and Sperling index are 0.14 m/s2,0.64 m/s2 and 2.58 respectively when the train passes through the turnout in straight/side reverse direction,which meet the requirements of smooth running of the train.The rubber spring floating slabs installed in the No.9 turnout area have little influence on the comfort of the train.The maximum rail displacement,when the train passes through the turnout in straight/reverse direction,is 3.78 mm,which does not exceed the requirements of relevant technical standards.The vibration reduction effect of rubber spring floating slab laid in No.9 turnout area reaches 18dB,which can meet the high vibration reduction demand.The above research results may provide theoretical guidance for the engineering and research of laying rubber spring floating slab in turnout area.