Simulation Analysis Of The Dynamics And Kinematics For Sliding Plug Door Of Urban Rail Vehicle

The sliding plug door of rail passenger car is one of the components of subway.As a mechanism frequently used in subway operation,the door is prone to fatigue and wear of parts with the increase of accumulated running time,which will affect the normal operation of the sliding plug door of rail passenger car.Therefore,this paper takes the sliding plug door system of rail passenger car as the research object,analyzes the dynamic and kinematic performance of the door system,studies the motion characteristics of the door system and conducts modeling analysis of the sliding plug door system,so as to obtain the door opening and closing performance and influencing factors.Then the force analysis and fatigue life analysis of the lead screw drive system are carried out,and the corresponding optimization analysis is carried out for the lead screw drive system,which is of great significance for extending the working life of the door system and the safe and stable operation of the rail car.The specific work content is as follows.This paper introduces the structure composition and working principle of the sliding plug door system of rail passenger car,and introduces the load-driving mechanism and the working principle of the sliding plug door in detail.The kinematics equation of the sliding plug door is established and the dynamics and kinematics of the sliding plug door are analyzed.The motion principle of the transmission system of the sliding plug door is analyzed,and the motion constraint relationship between the components of the transmission system is sorted out in detail,and the control logic and principle of the opening and closing of the sliding plug door are discussed.In particular,the complex contact relationship between the transmission components and the influencing factors of the contact force are studied.Finally,with the help of multi-body dynamics simulation software,The virtual prototype modeling of the sliding plug door system of rail car and the extraction of kinematics and dynamics parameters were completed,and the simulation analysis data were compared with the theoretical calculation data.The results show that the virtual prototype model established in this paper can accurately reflect the motion and stress of each component in the process of opening and closing the sliding plug door.On the basis of the previous studies,this paper further analyzed the structural strength and stiffness characteristics of the lead screw structure in the sellar door drive system.In order to describe the deformation and stress state of the lead screw structure under the action of contact force in detail,this paper established the rigid and flexible coupling model of the sellar door drive system with the rigid-flexible coupling modeling idea.The basic principle and modeling process of rigid-flexible coupling modeling were described in detail,the stress-strain variation data of the lead screw component was extracted during the opening and closing operation of the sliding door,the stress concentration location of the lead screw component was analyzed,and the operating life of the lead screw component was evaluated based on the Miner linear damage accumulation theory.At the same time,the motor control process of the sliding door is designed,and the speed control of the sliding door is discussed.The speed curve that can improve the motion performance of the lead screw drive system is designed,and the co-simulation model is established to verify and analyze the speed curve,which verifies that the new acceleration and deceleration strategy can well improve the dynamic performance of the sliding door and reduce the contact force of the lead screw drive system.Enhanced reliability of the sliding door system.