Abstract

The manufacturing technology of some aircraft parts involves rotation of parts in assembly jig during the integration process. As the jig rotates, the gravity acting on the parts changes its direction. It can affect the residual gap between parts joined with temporary fasteners and lead to eccentricity of drilled holes for rivets. A numerical approach for simulation of airframe assembly process with account of this effect is discussed in the paper. The approach is based on reformulation of contact problem in terms of quadratic programming and introduction of special correction terms in the force vector. The developed approach is applied to evaluation of effect of assembly rotation on the contact quality.

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