Research On Optimization Design For Locating/Supporting Flexible Fixture Of Fuselage Part

With the improvement of aircraft manufacturing model and technology,flexible fixture recently has become one of the development hotspots of the aircraft industry.Therefore,the related studies of optimization,one of the important key technologies of flexible fixture,have especial significance on developing flexible fixture.Not only to improve the performance of flexible fixture and the quality of fuselage manufacturing,but also to promote the development of manufacturing level,the locating/supporting layout optimization for fuselage part was in study,including designing a wide applicable strategy of optimizing locating/supporting layout and improving locating/supporting process by optimizing the layout.The main content of the research is as followed:(1)The features of the locating/supporting process of fuselage part were analyzed and the indexes of evaluating the superiorities-inferiorities of process were proposed.The interaction relationships among the evaluation indexes were analyzed,so that the method of optimizing locating/supporting process was proposed,which meant optimizing locating/supporting layout.Accordingly,the strategy of optimizing locating/supporting layout was designed.(2)Aimed at the intersection hole locating/supporting process for skeleton part,the single objective nonlinear constrained optimization model was constructed.The optimization results of simulation showed that,the strategy of layout optimization was applicable to skeleton part.Additionally,the deformation of skeleton part was effectively decreased in optimized locating/supporting layout.(3)Aimed at the multipoint vacuum adsorption locating/supporting process for surface part,the multiple objective nonlinear constrained optimization model was constructed.The optimization results of simulation showed that,the strategy of layout optimization was applicable to surface part.Also,due to this,the local stiffness of surface part was reinforced,which made for deformation and the number of locators decreasing.(4)The experimental platform was established and the locating/supporting layout optimization was experimented.The results of experiment and simulation were contrastively analyzed,which showed that the locating/supporting process can be effectively optimized and the strategy of locating/supporting layout optimizaition was applicable and feasible.