Establishment and Validation for the Theoretical Model of the Vehicle Airbag

作     者：ZHANG Junyuan JIN Yang XIE Lizhe CHEN Chao 

作者机构：State Key Laboratory of Automobile Simulation and Control Jilin University China Automotive Technology & Research Center 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2015年第28卷第3期

页      面：487-495页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 082302[工学-交通信息工程及控制] 0811[工学-控制科学与工程] 0823[工学-交通运输工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by National Natural Science Foundation of China(Grant No.51375203) Open Foundation of Zhejiang Province Key Laboratory of Automobile Safety of China(Grant No.LHY1308J00368) Changchun Municipal Science and Technology Planning Project of China(Grant No.12ZX79) 

主　　题：occupant restraint systems,airbag,theoretical model,concept design 

摘      要：The current design and optimization of the occupant restraint system（ORS） are based on numerous actual tests and mathematic simulations. These two methods are overly time-consuming and complex for the concept design phase of the ORS, though they＇re quite effective and accurate. Therefore, a fast and directive method of the design and optimization is needed in the concept design phase of the ORS. Since the airbag system is a crucial part of the ORS, in this paper, a theoretical model for the vehicle airbag is established in order to clarify the interaction between occupants and airbags, and further a fast design and optimization method of airbags in the concept design phase is made based on the proposed theoretical model. First, the theoretical expression of the simplified mechanical relationship between the airbag＇s design parameters and the occupant response is developed based on classical mechanics, then the momentum theorem and the ideal gas state equation are adopted to illustrate the relationship between airbag＇s design parameters and occupant response. By using MATLAB software, the iterative algorithm method and discrete variables are applied to the solution of the proposed theoretical model with a random input in a certain scope. And validations by MADYMO software prove the validity and accuracy of this theoretical model in two principal design parameters, the inflated gas mass and vent diameter, within a regular range. This research contributes to a deeper comprehension of the relation between occupants and airbags, further a fast design and optimization method for airbags＇ principal parameters in the concept design phase, and provides the range of the airbag＇s initial design parameters for the subsequent CAE simulations and actual tests.