Multi-body Dynamics Simulation And Structure Optimization Of Sliding Door

Compared with hinged swivel doors,the sliding door system of commercial vehicles has the advantage of maintaining a larger door opening while occupying less external space,which facilitates the entry and exit of cargo and passengers.The characteristics of the moving parts in the sliding door system,such as various coordination relations and complex moving trajectile.As an important part of perceived quality of sliding door system,and its perceived quality will directly affect consumers’ evaluation of vehicle quality.In order to solve the problem of poor perceived quality of the sliding door of the original model.This paper proposes a solution to the poor perceived quality of the old sliding door from two aspects of structural design and error control.In this paper,the Angle of guide rail,the structure and layout of the pulley arm in the sliding door were optimized,and the influence of the assembly error of guide rail on the perceived quality of the sliding door was studied.The main research contents of this paper are as follows:(1)Taking the sliding door system of the company’s old MPV models as the research object,analyze the structure and movement characteristics of the sliding door system.ADAMS dynamic simulation software is used to establish the multi-body dynamic model of sliding door system.The reliability of the sliding door model is verified by carrying out real car opening/closing force experiment,and the experiment proves that the model can be used to replace the actual sliding door for ride comfort analysis.(2)Taking the guide rail in the sliding door system as the research object,the change of the operating force of the sliding door under different attitudes was studied.Then,based on the function fitting function in MATLAB software,the functional relationship between the operating force of the sliding door and the attitude of the guide rail was obtained,and the inclination of the guide rail in the sliding door was optimized through simulation.Taking the sliding door walking arm as the optimization object,parametric design method was used to establish the full parametric models of the upper and lower sliding door walking arm respectively.Insight module in ADAMS software was used to optimize the assembly position and morphology of the sliding door walking arm with the perceived quality of the sliding door as the optimization objective.(3)Based on the real vehicle test and dynamic model of sliding door system,the influence of rail assembly error on the perceived quality of sliding door system was studied.Orthogonal experiment method was used to study the influence of assembly errors of the upper,.Finally,targeted error control strategies were proposed for different guide rails.