Study On Optimal Design For Flexible Assembly Platform Of Aircraft Forward Fuselage

Aircraft is a complex product. Because it is of large structure size and numerous complex-shapes parts, and it has strict requirements on the aerodynamic shape and machining accuracy, it needs a large amount of aircraft assembly platforms to ensure the quality of aircraft assembly. Therefore, aircraft assembly platform is of great significance to the aircraft manufacturing process. According to the practical difficulties faced by the aviation enterprises and the development status of related technologies, flexible assembly platform has become the trend of the development of assembly platform, and has become the hotspot of the research and applications at home and abroad. Flexible assembly platform that is applied on the manufacturing process of aircraft has replaced the former rigid assembly platform that relies on analogue data to transfer the dimension data. It allows the full circulation of using the digital data in the manufacturing process of aircraft so that the period of developing aircraft is greatly shortened. Thus, the studying on the structure design of flexible assembly platform has great importance on the process of aircraft manufacture.In this dissertation, based on the structural characteristics of the aircraft forward fuselage the author presents the design principle for flexible assembly platform of the aircraft forward fuselage. In order to improve the assembly accuracy of the aircraft forward fuselage, the author presents the design requirements for flexible assembly platform and gives the overall design plan of flexible assembly platform. Besides, the author tries to apply the optimization design technology to the design of flexible assembly platform. It includes using the large-scale optimization analysis software-optistruct-to optimally design the flexible assembly platform for the main stress components of the aircraft forward fuselage, and verifying the optimization results through the finite-element method. This solves the problems that widely exist in the assembly platform of the Chinese aviation enterprises such as variety and quantity, long preparation period, high development costs, and so on. This dissertation explores the technical solutions for the engineering practice of the flexible assembly platform.