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运用虚功原理推导最临界准则法在复杂大型混合结构上的优化准则公式,并结合飞行器结构优化设计的特点,对该算法在多工况、多约束下的实现进行探讨,扩展最临界准则法的应用范围。对该算法编制通用的计算机程序,运用其对一机翼结构进行算例验证,同时运用成熟的商业软件iSIGHT中可行方向法对算例进行优化,并对优化结果、耗时等进行对比,两者优化结果一致,从而证明对该算法扩展的正确性;而优化耗时方面最临界准则法明显优于可行方向法。该扩展后的算法已在某型号飞机的机翼主承力结构优化设计上得到运用。结果表明,扩展后的最优准则法通用性强,易于实现,优化耗时短,是一种实用的工程优化方法。
Based on the principle of virtual work, the optimal criterion formula of the most critical criterion method for complex large-scale hybrid structures is deduced. Combining with the characteristics of aircraft structure optimization design, this algorithm is discussed in the realization of multi-conditions and multi-constraints. The most critical criterion method The scope of application. The general computer program is compiled and used to validate a wing structure. At the same time, a feasible direction method of iSIGHT is used to optimize the example, and the optimization results and time-consuming are compared. Two The results of the optimization are consistent, which proves the correctness of the proposed algorithm. And the most critical criterion method in optimization and time-consuming is obviously better than the feasible direction method. The extended algorithm has been used in the optimization design of the main supporting structure of the wings of a certain type of aircraft. The results show that the extended optimal rule method is versatile, easy to implement and has short optimization time. It is a practical engineering optimization method.