Title of Paper:Layout Optimization for Blended Wing Body Aircraft Structure

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Affiliation of Author(s):航空学院

Journal:INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES

Key Words:Blended wing body Structural layout Optimization Composite materials Equivalent stiffness

Abstract:Structural layout design of blended wing body (BWB) aircraft in the preliminary design phase is a challenging optimization problem due to large numbers of design variables and various constraints. A two-loop optimization strategyis proposed to solve the BWB aircraft structural layout design problem considering constraints of the displacement, stress, strain, and buckling. The two-loop optimization consists of an inner loop and an outer loop. The inner loop is to optimize each stiffened panel of the BWB aircraft structure, and outer loop is to find the best layout design. To improve computational efficiency, an equivalent finite element model is applied to BWB aircraft structure analysis, and an analytical method is used for buckling and static analysis of the stiffened panels. The proposed method can efficiently solve the structural layout optimization problem of a notional BWB aircraft with acceptable computational burden. The result indicates the mass of main load-carrying structure of the BWB aircraft is reduced by 9.28% compared to that of the initial structural layout.

ISSN No.:2093-274X

Translation or Not:no

Date of Publication:2019-12-01

Co-author:Zhu, Wensheng,Wang, Yu,Wang Yuan

Correspondence Author:yxq