Back analysis method of frictional characteristics of vehicle collision passenger constrained system based on injury evaluation

Abstract

The invention discloses a back analysis method of frictional characteristics of a vehicle collision passenger constrained system based on injury evaluation. According to the method, based on establishing a direct problem simulation model of the vehicle passenger constrained system, vehicle collision experimental data is utilized for reverse calculation to determine the frictional parameters of the constrained system. The method takes the accelerated speed and injury evaluation indicators of all parts of a passenger acquired through simulating calculation, and a minimum error function through an experimental measurement response as objective functions, and adopts a proper optimized algorithm to perform iterative optimization on to-be-identified parameters. When the error between the calculation response and the measurement response is the minimum in the least-squares method, the frictional parameters of the constrained system can be acquired through reverse calculation. Through the adoption of the method, the actual frictional parameters of the constrained system during the vehicle collision process can be correctly and effectively acquired, the frictional parameters including the frictional coefficient between a shoulder girdle of a seat belt and the shoulder of a passenger, the frictional coefficient between the shoulder girdle of the seat belt and the chest of the passenger, and the frictional coefficient between the shoulder girdle of the seat belt and the belly of the passenger can not be determined according to a conventional method.

Description

technical field [0001] The invention belongs to the technical field of structural characteristic recognition, and in particular relates to a back analysis method for friction characteristics of a vehicle collision occupant restraint system based on damage evaluation. Background technique [0002] With the popularization of automobiles, traffic accidents occur frequently, causing heavy casualties and property losses. Automobile safety has become a hot research topic in the modern automobile industry. The vehicle occupant restraint system is a safety device used to reduce or avoid secondary collisions when the vehicle collides, and is an important part of the passive safety design of the vehicle. A good occupant restraint system design can effectively improve occupant protection performance, greatly reduce occupant injuries, and reduce mortality. However, there are many components in the restraint system, including steering system, instrument panel, seat, pedal, airbag, seat ...

AI Technical Summary

Problems solved by technology

However, there are many components in the restraint system, including steering system, instrument panel, seat, pedal, airbag, seat belt, human body, etc. Some parameters are difficult to obtain directly through experiments, such as the human body and seat belt, seat during a vehicle collision. friction etc.

If these structural parameters cannot be obtained accurately, the actual restraint system developed may not meet the performance requirements of the original design, and may even lead to serious safety hazards during its service

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