Vehicle door deformation acquisition method considering nonlinear compression characteristics of sealing strip

Abstract

The invention relates to a vehicle door deformation acquisition method considering nonlinear compression characteristics of a sealing strip. Nonlinear compression load-deformation data in the compression process of the vehicle door sealing strip are obtained based on finite element analysis; a nonlinear compression load-deformation function relationship of the sealing strip is obtained through segmented spline interpolation; airflow pressure data of the outer surface of an automobile door are obtained based on computational fluid mechanics analysis, a flexibility matrix of the position and direction of deformation needing to be solved on the automobile door and the position and direction of an airflow force acting point is obtained based on finite element analysis, and the automobile doordeformation amount is iteratively solved through a numerical analysis method. According to the method, a rapid calculation and evaluation means is provided for engineering analysis of vehicle door deformation, a numerical analysis method and basis are provided for compression evaluation and acoustic optimization of the sealing strip. Compared with the prior art, the method has the advantages of being simple in calculation process step, convenient to program, good in universality, high in engineering practical value and the like.

Description

technical field [0001] The invention relates to the field of mechanical and acoustic engineering analysis of vehicle door components, in particular to a method for obtaining deformation of a vehicle door considering the nonlinear compression characteristics of sealing strips and the force of airflow. Background technique [0002] High-speed wind noise is currently a prominent problem in improving the comfort of the car passenger compartment. Improving the sealing and sound insulation performance of door components under high-speed conditions can effectively reduce high-frequency wind noise. The engineering issues involved include the stiffness of the door and the compression rate of the sealing strip. , the sound insulation performance of the sealing strip, the airflow outside the body, the vibration characteristics of the door system, etc. Mature finite element theory and commercial codes provide the basis and tools for engineering analysis of car door components, which can...

AI Technical Summary

Problems solved by technology

However, the non-linear and large-deformation compression characteristics of the sealing strip in contact with the door make the boundary conditions of the engineering analysis of the door components complex, the solution efficiency is low, and the solution is difficult to converge. The problem of difficult convergence of nonlinear solution, this approximate treatment lacks consideration of the nonlinear compression characteristics of the sealing strip, especially for the installation of two or even multiple sealing strips, sealing strips with variable cross-section, and sealing strips with special cross-section design, etc. In the deformation analysis of the car door, the linearization process will cause the solution to deviate from the reality, and it is impossible to effectively evaluate the influence of the section design of the sealing strip on the mechanical and acoustic response

In the prior art, there is still a lack of considering the high-speed air flow and the nonlinear compression characteristics of the sealing strip into the deformation analysis of the car door at the same time.

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