In order to solve the problem that the riveting process of carbon fiber reinforced polymer(CFRP)and metal material laminated components is more complicated than that of a single material,a method for sensitivity analysis of the riveting process parameters of laminated composites based on the method of moment-independent PAWN is proposed.Firstly,taking CFRP and aluminum alloy(Al)heterogeneous laminated composite structure as the research object,the simulation and analysis model of riveting CFRP/Al laminated structure is established by using the finite element method,and the correctness of the simulation and analysis model is verified by experiments.Secondly,a proxy model of riveting process parameters based on the random forest method is established with the riveting interference amount as the target;furthermore,data extension is carried out through the proxy model,and a global sensitivity analysis based on the moment-independent PAWN method is carried out with 17 riveting process parameters as input variables and the riveting interference amount as the output variable,and the sensitivity coefficients based on this method are given.Among the global sensitivity coefficients of riveting process parameters on riveting interference amount,the sensitivity coefficients of elasticity modulus and thickness of the heterogeneous laminated composites are 0.16921 and 0.11837,respectively,followed by the coefficients of 0.012 for the displacement load and 0.011 for the rivet diameter.The values of other process parameters are small,and the sensitivity coefficients of some parameters that have insignificant effects on the riveting interference amount are close to zero.
关键词
叠层复合材料/有限元方法/铆接干涉量/随机森林代理模型/矩独立全局灵敏度分析
Key words
Laminated composites/Finite element method/Riveting interference amount/Random forest proxy model/Global sensitivity analysis based on moment independence
维普
万方数据