摘要
在汽车乘员约束系统的设计过程中,其设计变量具有一定的不确定性。传统的优化设计由于忽略了不确定因素的影响,当设计变量产生波动时,往往会导致目标超出约束边界或目标函数对设计变量的波动极为敏感,从而使设计失效。针对某款微型客车,通过乘员损伤分析软件建立该车的正面碰撞乘员约束系统仿真模型并对模型进行验证。基于该模型将试验设计、Kriging近似模型和蒙特卡罗模拟技术相结合,构造基于产品质量工程的6σ稳健性优化设计方法,实现对设计目标的优化并提高了设计变量的可靠性和目标函数的稳健性。工程算例表明,该方法在乘员约束系统设计方面具有较强的工程实用性。
Design variables have some uncertainties during the design process of occupant restraint system.Conventional optimization design,however,neglects uncertainties,it always leads to optimal object beyond constraints or object function very sensitive to the fluctuation of design variables,thus resulting in design failure.Aiming at a minibus,by means of the occupant injury analysis software,a simulation model of occupant restraint system for frontal impact of the minibus is built and the verification of the model is carried out.Based on the model,through the applications of experimental design,Kriging models and Monte Carlo simulation technique,a 6σ robustness optimization method based on product quality engineering is constructed.The method not only searches the optimum results for the design object,but also improves the reliability of the design parameters and the robustness of objective function.Engineering example indicates this method has stronger engineering practicability in the design of occupant restraint system.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2010年第22期123-129,共7页
Journal of Mechanical Engineering
基金
湖南大学汽车车身先进设计制造国家重点实验室自主研究课题资助项目(60870005)
关键词
稳健性优化
汽车安全
正面碰撞
乘员约束系统
Robustness optimization Vehicle safety Frontal impact Occupant restraint system
