快速响应的工作要求使顺序增压切换阀阀体挡台接触面承受较大的冲击作用，为了探索接触面在工作中所受的冲击效应，采用ANSYS有限元仿真软件，建立各个部件之间的接触关系和有限元分析模型，对顺序增压切换阀进行五种工况下的瞬态动力学仿真分析，预测了冲击破坏的区域，得到了切换阀在关闭过程中阀板和阀体挡台接触面的冲击强度的变化规律。仿真结果表明：切换阀速度与应力峰值产生部位分别为阀板、阀体挡台距离转轴最远处；阀板与阀体挡台总冲击响应时间为5 ms左右，顺序增压切换阀冲击过程中阀体挡台接触面应力的理论计算值与仿真分析计算结果值误差在10%以内，吻合性较好。

Due to the fast response requirements, the contact surface of valve body stopper for the sequential turbocharging switch valve bears a greater impact. In order to explore the impact effect of contact surface, ANSYS finite element simulation software was used to establish the contact relationship between various components and the finite element analysis model, the transient dynamic simulation analysis of sequential turbocharging switch valve was carried out under five working conditions, the impact damage area was predicted, and the change laws of impact strength for the contact surface of valve plate and valve body stopper during the closing process of switch valve were obtained. The simulation results show that the velocity and stress of switch valve reach the peak at the position that the valve plate and the valve body stopper are farthest from the shaft. The total shock response time of valve plate and valve body stopper is around 5 ms. The error between the theoretical calculation value and the simulation result for the contact surface stress of valve body during the shock process of sequential pressurized switch valve is within 10%, which shows that the theoretical calculation value and the simulation result is in good agreement.