Method of determining explosive power of automotive safety airbag

Abstract

The invention discloses a method of determining explosive power of an automotive safety airbag. The method includes the steps of (10) determining an explosive reaction formula, to be specific, determining the explosive reaction formula according to the types of sodium azide substances in the safety airbag; (20) calculating fixed pressure explosion heat, to be specific, using formation heat to calculate fixed pressure explosion heat according to Hess's Law; (30) calculating fixed volume explosion heat, to be specific, calculating fixed volume explosion heat according to the relationship betweenthe fixed volume explosion heat and the fixed pressure explosion heat; (40) calculating TNT equivalence conversion coefficient, to be specific, calculating the TNT equivalence conversion coefficientof a gas-producing agent according to the theory of energy similitude and the fixed volume explosion heat of TNT explosives under the same conditions; (50) calculating TNT equivalence, to be specific,calculating mass of the gas-producing agent according to molar weight of the gas-producing agent, and calculating the corresponding TNT equivalence of the gas-producing agent in combination with theTNT equivalence conversion coefficient. The method herein has good applicability and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of calculating and evaluating the explosion power of an airbag, and in particular relates to a method for theoretically determining the explosion power of an automobile airbag with good adaptability and high accuracy. Background technique [0002] Automobile airbag is a kind of protective equipment used in conjunction with seat belts to assist passenger safety. It is mainly composed of airbag bags, sensors, gas generators and igniters. So far, airbags have reduced the risk of fatal car frontal collisions by 30%, and have become an important part of the passive safety system of cars. However, airbags contain gas-generating agents, smokeless gunpowder, electronic signal devices, etc., which belong to Class 1 dangerous goods. Accidental explosion accidents often occur during manufacturing, transportation, storage, and use, causing casualties and facility damage. Therefore, in order to evaluate the performance ...

AI Technical Summary

Problems solved by technology

Generally speaking, although the method of experimental research can better reflect the explosive power of the gas generator through the test results, there are also problems such as long period, high cost, and large randomness of test results.

At present, there is still a lack of a simple and reliable theoretical calculation method for the explosion power of the airbag.

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