Bus Outside Sliding Door Structural Optimization Design And Performance Simulation Analysis

As a relatively independent and complex assembly on bus,passenger door is the important part of bus body appearance,which also affects vehicle performance.From promotion of open and close performance,economy and aerodynamic performance angle,analyzing on merits and drawbacks of existing bus passenger door at home and abroad,a new bus outside sliding door is proposed.The simulation optimization on bus outside sliding door open and close performance is proceeded with a combination of motion theoretical calculation and simulation method.The motion condition in optimal performance is obtained.The main content is as follows.(1)By analyzing on merits and drawbacks of existing bus passenger door at home and abroad,a new sliding-sleeve four bar removal mechanism of bus outside sliding door is proposed.The outside sliding door has simple and compact structure,small space occupation and large opening.(2)Kinematics and dynamics theoretical analysis for core part sliding-sleeve four bar removal mechanism is calculated by means of analytic method.Bus outside sliding door removal trajectory,kinematic velocity and acceleration and force equations constrained on three kinds of guide rail are deduced,and theoretical trajectory curve is drew by MATLAB.(3)Three-dimensional entity model of bus outside sliding door is built on the platform of UG,and virtual prototype model is constructed by which imported to ADMAS software by exporting Parasolid Interface.Using combination of IF function and STEP function,three kinds of motor drive functions are established,realizing Kinematics and dynamics simulation of bus outside sliding door by opening and closing in variable speed.(4)In order to realize good open and close performance,by comparison of simulation curves of bus outside sliding door motion trajectory,velocity,acceleration,roller load carrying and so on constrained on three kinds of guide rail and three kinds of motor speed,the best matching scheme of the rail type and motor condition is obtained,which promoting flexibility of bus outside sliding door opening and closing.Then,the motion consistency of up and down is analyzed.(5)Finite element analysis and topology optimization design for rocker arm of slide bushing and four-bar linkage is conducted using HyperWorks software,lightweight model is established,which achieve the purpose of optimization design.