Method for modeling and simulating door lock system based on vehicle crash safety

Abstract

The invention discloses a method for modeling and simulating a door lock system based on vehicle crash safety. The method comprises the following steps of: A, preliminarily modeling the door lock system: performing geometry processing modeling and meshing on the door lock system, and exerting a motion relation restraint on components of the door lock system; B, simulating a pull rope mechanism: simulating the pull rope mechanism by using a mechanism with an equivalent synthesized spring and deducing expressions of an initial torque and an elasticity coefficient of the equivalent synthesized spring; C, inputting parameter information into the door lock system, wherein the parameter information comprises spring information, material information of the system components and quality information of the system components; and D, transferring the current door lock system model into a whole vehicle crash finite element calculation model and performing crash simulation calculation, and determining the crash safety performance of the door lock system by analyzing a simulation result. By the method, mechanism motion and component deformation of the door lock system at the moment of vehicle crash can be simulated precisely, so that the crash safety performance can be evaluated and analyzed accurately, the product design period can be shortened and the experimental cost is saved; therefore, the practicability is high.

Description

【Technical field】 [0001] The invention relates to a modeling and simulation method of a door lock system, in particular to a modeling and simulation method of a door lock system based on automobile collision safety, and belongs to the technical field of computer simulation. 【Background technique】 [0002] In recent years, with the continuous increase of car ownership, economic and social problems caused by traffic accidents have become increasingly prominent. According to statistics, in 2008, a total of 265,204 road traffic accidents occurred across the country, resulting in 73,484 deaths and 304,919 injuries, with direct property losses reaching 1.01 billion yuan. Therefore, the issue of automobile safety has been paid more and more attention by the government, consumers and automobile manufacturers. [0003] During a car collision, if the door lock system is unlocked and the door is opened, there is a risk that the occupant will be thrown out and cause secondary injury to...

AI Technical Summary

Problems solved by technology

The existing door lock system simulation research only uses simulation software or mechanism principles to analyze the structural mechanics and dynamics of the door lock system. Impact deformation of surrounding components (such as door levers, window guide rails, etc.)

Therefore, the existing simulation research on the door lock system cannot accurately simulate the deformation of the door lock system components during the car collision and its impact on the movement of the system mechanism, so that it is impossible to make an accurate judgment on the collision safety performance of the door lock.

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