Key Technology Research Of Automotives Door System

Vehicle-door systems have many important roles as a part of vehicle.So, it is very important to research the veheicle-door system for the China's vehicle research and development capability. In order to deal with the door systems problem in the vehicle completely, mechanics model should be established in theory and corrected and optimized. And some technology based on vehicle door should be accumulated deeply. Firstly, it has a beief discription in the development of FEM and theory research and algrorithm will be presented for the CAE technique related to door system.Secondly, front-door stiffness has been calculated,compare and analysis base on several methods by FEM in a mini-bus. By CAE analysis and optimization, the best design method is choosed and its vertical stiffness has enhanced 65% and corrected stiffness property meet the requirment of door design. In order to decrease the workload of CAE analysis, it is presented the new evaluation method of door-inner's stiffness.It only need a calculate process to reach the requriment of validate the door system's standand stiffness. its method do well in the a mini-bus slipdoor-innor's shape optimization.Thirdly, it is presented the research status of door seal system of vehicle in the country and aboard. Simple mechanics model has been established in vehicle door-close force and analyze the deformation conditon of door seal in the door-close process. Aim at seal's large deformation property and material,structure,contact's nonlinear, FEM analysis has been done in the mini-bus door-seal and optimized in the body structure. New seal stucture can get the smaller door-close forces. It has a consistence in the test data and CAE analysis.The last, the research and analysis have been done in the door latch system and glass-lifter. The structure of the latch and lifter have been modified and optimized by ADAMS and NASTRAN software. It has put forward 4 pieces of advise on the latch structure and the base stiffness have increased 40% almost.For the lifter's structure and assembly, it has put forward some methods to decrease the failture raito largely.