船撞作用下列车-轨道-桥耦合系统动力响应分析OA

When a ship collides with a bridge,the impact force affects the safety and smoothness of the bridge structure itself as well as the operation of the train on the bridge.Simpack and Abaqus software were used to jointly simulate the train-rail-bridge system under ship impact.The evaluation criteria for the dynamic re-sponse of train and bridge were introduced,and the system dynamic response of a train running on a bridge at 200 km/h while the bridge was impacted by a 500 t class ship at 4 m/s was investigated.The train speed and the location of the ship's impact force were taken into account on the dynamic response of the train.The re-sults show that compared with no impact,the train derailment coefficient,wheel weight reduction rate and wheel-rail transverse force on the bridge with impact are increased by 22.80,14.50 and 18.94 times.The transverse and vertical displacements and the transverse and vertical accelerations in the bridge span are in-creased by 46.50,2.07,and 10.00,2.10 times,respectively.When the train speed reaches 250 km/h,the dynamic response of the train increases dramatically,and the train has a high risk of derailment when the bridge is impacted by the ship.When the train is running on the left track of the bridge,the train dynamic re-sponse increases significantly when the ship impacts on the left track side of the abutment compared with when the ship impacts on the right track side of the abutment.The recommended train speed is below 200 km/h,and the position of the ship's impact force is a key factor affecting the safety of the train.