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The paper is devoted to the simulation of A320 wing assembly on the base of numerical experiments carried out with the help of ASRP software. The main goal is to find fasteners’ configuration with minimal number of fastening elements that provides closing of admissible initial gaps. However, for considered junction type initial gap field is not known a priori though it should be provided as input data for computations. In order to resolve this problem the methodology of random initial gap generation based on available results of gap measurements is developed along with algorithms for optimization of fasteners' configuration on generated initial gaps. Presented paper illustrates how this methodology allows optimizing assembly process for A320 wing.

The paper is devoted to further extension and development of numerical approach aimed at simulation of riveting process during aircraft assembly (see [1,2,3,4]). Previous research has shown that developed methodology provides reliable results if the rigid motion of bodies being assembled is forbidden. However, some small parts in the airframe assemblies are not supported prior to the junction and can freely move as a rigid body. This fact introduces additional difficulties when solving corresponding contact problem. The paper is devoted to description and analysis of two different modeling approaches that allow taking unsupported parts into consideration when simulating airframe assembly process.