Analysis And Optimization Of Window Regulator's Motion Performance Based On Multi-body Dynamic Simulation

The window regulator is a component used frequently in automobile,which has important functions such as glass lifting,sealing,anti-theft and so on.In addition,in order to meet the requirement of comfort from drivers and passengers,the location of the glass often needs to be adjusted.There are many components that compose the door glass lifting system,which leads to a complex movement process of the whole system.Therefore it is difficult to distinguish the cause of the glass regulator's movement issues,which is always a difficulty in the design of the entire vehicle system.Hence,how to design and layout the window regulator reasonably has become one of the challenges faced by engineers from the automobile industry.But due to the relatively weak ability in development,domestic automakers often chose to depend on experience in the product design stage rather than using the computer aided technology,which leads to disadvantages of long development cycles,high costs,poor product quality and so on.,and seriously restrict the development of domestic automobile industry.Therefore,the application of numerical simulation analysis method in studying the performance of the window regulator has great value in theory exploring and engineering practice.This thesis focuses on the discussion of design requirement of window regulator and structure of the window regulator of vehicle door,gives the theoretical calculation method for the lifting point of single rail rope-wheel window regulator,and determines the quantitative indicators of window regulator motion performance.Afterthen,based on the multi-body dynamics Adams/View software platform,the finite element model of the single rail rope-wheel type window regulator was established.The kinematics and dynamics simulation analysis was performed using the rigid-flexible coupling analysis method.The maximum error between simulation and test was within 8%,the reliability of the finite element model was verified.This thesis focuses on the simulation and analysis of the structure and assembly relationship of various components in the window regulator system,and obtains design and layout requirements of a series of key parts such as lift guide rails,glass niches,water clips,glass chutes,and guide rails for glass brackets and lifters.Thus,on the basis of improving product design efficiency and reducing costs,the product design quality is further improved.In this thesis,the finite element analysis of the actual problem of the left front door window regulator system of a certain type of vehicle was carried out to find the cause of the glass jamming and tilting up and down,and an optimization plan was put forward to rectify it.The test results showed that motion performance of window regulator was improved after rectification.All smoothness indicators meet the technical requirements.Finally,based on the research results of the subject,this thesis summarizes the design points of the single rail rope-wheel window regulator,and provides an important reference basis for the position layout,structure optimization and troubleshooting of the lifter products,which has important engineering value for the development of automotive door window regulator system.