动态模型全局灵敏度分析及其在汽车前桥结构中的应用  

Global Sensitivity Analysis for Dynamic Models and Its Application to Automotive Front Axle Structures

作　　者：张凯超 付锐[1] 袁伟[1] 罗耿 贺冰清 ZHANG Kaichao;FU Rui;YUAN Wei;LUO Geng;HE Bingqing(School of Automobile,Chang’an University,Xi’an 710064,China;China Unicom Shanxi Branch,Xi’an 710075,China)

机构地区：[1]长安大学汽车学院,西安710064 [2]中国联合网络通信有限公司陕西分公司,西安710075

出　　处：《汽车工程学报》2023年第5期773-780,共8页Chinese Journal of Automotive Engineering

基　　金：国家重点研发计划项目(2019YFB1600500);陕西省自然科学基础研究计划项目(2023-JC-QN-0038,2022JQ-224)。

摘　　要：汽车结构中不可避免地存在各种不确定性,严重影响汽车的安全使用,灵敏度分析可以明晰不确定性的影响关系,为提高汽车安全性提供有效指导。针对动态模型,在引入模型变化不确定性的基础上,提出动态模型基于方差的全局灵敏度分析,并对方差贡献及灵敏度指标的涵义进行了详细论述,其与Sobol理论保持着较好的一致性,且计算上仅增加了一维反映模型变化不确定性的变量。利用动态模型基于方差的全局灵敏度分析对汽车前桥强度问题进行了分析。Inevitably,there are various uncertainties in the vehicle structures that significantly impact safe operation.Sensitivity analysis can clarify the influence of these uncertainties and provide effective guidance for improving vehicle safety.Based on the introduced uncertainty of model change,the paper proposed a variance-based global sensitivity analysis for dynamic models,and discussed the meanings of variance contributions and sensitivity indices in detail.This method maintains good consistency with Sobol's theory,and only a one-dimensional variable reflecting the uncertainty of model change is added to the calculation.Finally,the variance-based global sensitivity analysis for dynamic models is used to analyze the strength of automobile front axles.

关 键 词：全局灵敏度分析 不确定性分析 动态模型 Sobol理论 准-方差贡献 

分 类 号：TB114.3[理学—概率论与数理统计]