摘要
主要介绍COMPASS的主要功能和关键技术。COMPASS作为一个多学科优化设计软件系统,分全机、翼面和壁板三个层次进行优化,综合满足气动、气弹、强度、刚度、振动稳定性和重量等要求。首先,利用最优准则法(满应力/应变法)处理强度约束获得全机结构的最佳尺寸,并提出了以分层厚度为设计变量、以应变能原理为基础的复合材料二级优化方法;其次,利用数学规划法对翼面结构进行满足刚度、振动、颤振和静弹等要求的多约束优化,并且能够对机翼进行气动弹性剪裁和载荷弹性修正;最后,对加筋壁板进行稳定性分析和优化设计,寻找满足稳定性要求的最佳型材类型和截面尺寸。大量工程应用表明,COMPASS方法准确、技术实用、设计效率高,是飞机结构概念设计和初步设计阶段非常有效的设计手段。
The configuration of COMPASS and its key techniques are introduced in this paper. The multilevel optimization strategy is used to meet the challenge of the lighter weight, the longer life and the more reliability of the modem aircraft. The global constraints（deflection, flutter speed ,static aeroelastic divergence speed and efficiencies）and local constraints （stress ,strain, and local buckling） are treated by optimum criteria method and mathematical programming method respectively. Firstly ,a fully stressed/strained design （FSD）, in which the thickness ratio of the ply groups of composite laminates is adjusted by the contributions of their strain energy, is proposed. Secondly, wing structures are optimized by mathematic programming method and sensitivity analysis technique to satisfy the multi-constraints such as weight, deformation, torsion, and vibration frequency. Finally, stiffened stringer panels are optimized for searching optimal geometry and section size satisfying stability demands. According to present method, COMPASS software has been developed and enhanced. Some engineering examples demonstrate the reliability and efficiency of the method. It is shown that COMPASS is a powerful engineering design tool to improve structural efficiency, to enhance aircraft performance, to reduce duration of structural design, and to decrease investment required via multidiscipline structural synthesis.
出处
《强度与环境》
2010年第1期22-29,共8页
Structure & Environment Engineering
