论文部分内容阅读
随着航空科技的发展,追求飞机任务的多样化和低生命周期成本成为一大趋势,其中模块化飞机设计对于未来飞机设计的多用途以及经济性具有实际意义。针对模块化飞机结构优化设计的特点,提出了等效多工况(EMCO)法,将模块化结构优化问题分解为通用模块的多工况优化问题和各专用模块的独立优化问题。通用模块等效为承受多工况载荷的结构,并按多工况优化方法进行优化设计,使通用模块质量最轻。各型号的专用模块在此基础上分别进行独立的优化设计。通用模块和专用模块交替优化,直至目标函数值收敛。最后,分别通过模块化桁架结构和机翼结构优化实例展示了该方法的运用效果,并与单独优化结果和加权单目标优化结果进行了对比。结果表明该方法降低了计算规模,收敛效果较好。
With the development of aviation science and technology, diversification and low life-cycle cost of pursuing aircraft tasks have become a trend. Modular aircraft design is of practical significance for the future versatility and economy of aircraft design. Aiming at the characteristics of modular aircraft structure optimization design, an equivalent multiple working condition (EMCO) method is proposed to decompose the modular structural optimization problem into a multi-condition optimization problem of a general-purpose module and an independent optimization problem of each dedicated module. The common module is equivalent to bear the structure of multi-case load, and optimize the design according to multi-condition optimization method, so that the common module lightest quality. Each type of special module on the basis of independent optimization design. The common and special modules are alternately optimized until the objective function value converges. Finally, the application results of this method are demonstrated through the examples of modular truss structure and wing structure respectively, and compared with the results of single optimization and weighted single target optimization. The results show that this method reduces the computational scale, and the convergence effect is better.