Study on wind-induced operation safety in typical subgrade sections of 400 km/h high-speed railways
Focusing on four representative subgrade section structures of a high-speed railway designed for speeds of 400 km/h,this article investigates the subgrade and train models that are established through the windmill road coupling dynamic analysis method and the ANSYS and multi-body dynamics software SIMPACK method,respectively.In doing so,the dynamic response of the CRH380 when passing at a speed of 400 km/h under 20-40 m/s ambient wind speed is analyzed.Based on the evaluation criteria,a control index of wind-induced operation safety is proposed.The findings indicate that the lateral acceleration response of the vehicle body serves as a viable control parameter for wind-induced operation safety.In addition,the lateral to vertical force ratio increases with increasing wind speed,but remains below the upper limit of 0.8 even at wind speeds up to 40 m/s.The 4#subgrade section exhibits the highest tolerance to maximum ambient wind speeds,offering optimal wind-induced operation safety.Moreover,the vehicle response index on the leeward side is significantly greater than that on the windward side.This suggests that the windward side should be the primary focus for the dynamic simulation analysis under the influence of crosswind.
万方数据
维普
