Analytical Study of Transmission of Load from Skin to Stiffeners and Rings of Pressurized Cabin Structure

摘要

The general problem of this paper is the deformation and the stress analysis of a pressurized cabin structure, consisting of sheet metal skin, longitudinal stringers, and a finite number of rings which are equally spaced between two and bulkheads. The minimum potential energy method is used. The deformations are calculated by solving the simultaneous difference equations, involving three deformation parameters - radial expansion of rings, quilting of stringers, and transverse elongation of skin. The tensile stresses of the rings and the stringers, and the longitudinal and the circumferential stresses of the skin are determined from the deformations. A few special cases from the general problem are also considered. The results obtained during tests of pressurized cabin structures by both the Lockheed Aircraft Corporation and the Consolidated- Vultee Aircraft Corporation yield reasonable checks with the results from the theoretical analysis.