Finite element modeling method for sealing strip of opening and closing piece

Abstract

The invention discloses a finite element modeling method for a sealing strip of an opening and closing piece, which comprises the following steps of an environment establishing step: establishing a finite element model of an installation environment component; and a sealing strip partitioning step: partitioning the finite element model of the sealing strip according to the position of the compression section. And a miniature model establishing step: establishing a miniature finite element model for each partition. And a material attribute calculation step: according to the miniature finite element model of each subarea, obtaining a compression force-displacement curve of the sealing strip in each subarea through finite element solving calculation. And a material attribute loading step: establishing connection between the vehicle body finite element model and the sealing strip finite element model and connection between the opening and closing piece finite element model and the sealingstrip finite element model, and loading the material attribute parameters of each subarea to the corresponding subarea of the sealing strip finite element model. And a boundary condition loading and simulation step: loading boundary condition parameters, and obtaining an analogue simulation result through finite element operation.

Description

technical field [0001] The invention relates to the field of auto parts, more specifically, to a computer aided design method for auto parts. Background technique [0002] With the rapid development of the automobile industry, consumers' requirements for car driving performance, safety performance and comfort performance are gradually increasing. Automobile companies continue to improve vehicle quality and passenger experience in accordance with regulatory requirements and internal experimental standards. As a very important functional part in the car, the opening and closing parts of the vehicle have the function of isolating noise and buffering external impact. The opening and closing parts of the vehicle include the door and the front and rear hatches. , to withstand cyclic force loading and unloading, and its fatigue life is directly related to the economy and comfort of the vehicle. [0003] In vehicle fatigue conditions, since the existing simulation technology canno...

AI Technical Summary

Problems solved by technology

However, since the opening and closing part is a highly nonlinear transient process at the moment of closing, the linear spring element with a single stiffness cannot accurately simulate the stress in the connection area between the opening and closing part and the sealing strip in this process

If the volume element is used to simulate the entire sealing strip, since the volume element needs at least three layers of grids in the force direction to accurately simulate the stress during the compression process, this will greatly increase the number of finite element grids in the model, and the calculation efficiency is extremely high. low

[0005] Due to the above-mentioned reasons, the modeling and simulation of sealing strips in the existing simulation technology cannot take into account the calculation efficiency and simulation accuracy, so the simulation effect is not good, and the fatigue physical test of the entity must be combined

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