STRUCTURE SCHEME OF OFFSET ELLIPSOIDAL SHELL ADVANCED COMPOSITE REAR PRESSURE BULKHEAD

Abstract

Abstract: In this paper, the offset ellipsoid equation is studied, and the rear pressure bulkhead of different sizes and shapes can be obtained by changing the relevant parameters. A method for determining the shape of the rear pressure bulkhead is obtained. The shape of the rear pressure bulkhead is determined by the size requirements of a certain type of aircraft. The strain analysis under the internal pressure and the stability analysis under the external pressure are carried out by the finite element method. The stability of parts of the rear pressure bulkhead determines the basic scheme of reinforcement. This article also analyzes the stability of the rear pressure bulkhead after grid reinforcement, considering the influence of different reinforcement forms, and finally obtains a better grid reinforcement structure scheme.

Key words: advanced composites, rear pressure bulkhead, offset ellipsoidal shell, grid stiffened structure, stability

CLC Number:

TB332

XU Fei-fan, ZHOU Shi-gang, CAI Qi-yang. STRUCTURE SCHEME OF OFFSET ELLIPSOIDAL SHELL ADVANCED COMPOSITE REAR PRESSURE BULKHEAD[J]. Composites Science and Engineering, 2020, 0(7): 53-57.

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