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针对多学科设计优化(MDO)中考虑不确定性而带来的计算复杂性问题,采用序列优化与可靠性评估(SORA)法的解耦思想,提出了基于两级集成系统综合(BLISS)策略和性能测量法(PMA)的多学科可靠性设计优化(RBMDO)方法。该方法将传统的3层嵌套循环的RBMDO方法过程解耦为顺序执行的确定性多学科设计优化(DMDO)和多学科可靠性分析(MRA),DMDO和MRA均采用BLISS策略进行计算,避免了每次多学科设计优化对完整可靠性分析模型的反复调用。飞机起落架缓冲器算例结果表明,文中方法的计算效率较其他两种方法分别提高了52.01%和26.51%,验证了方法的有效性。
In order to solve the computational complexity caused by considering uncertainties in multidisciplinary design optimization (MDO), a decoupling method based on sequence optimization and reliability assessment (SORA) is proposed. Based on two-stage integrated system synthesis (BLISS) And multi-disciplinary reliability design optimization (RBMDO) method of performance measurement (PMA). This method decouples the conventional RBMDO method of three-layer nested loops to deterministic multidisciplinary design optimization (DMDO) and multidisciplinary reliability analysis (MRA) which are executed sequentially. Both DMDO and MRA are calculated using the BLISS strategy to avoid Each iteration of multidisciplinary design optimization to a complete reliability analysis model. The calculation results of the aircraft landing gear bumper show that the computational efficiency of the proposed method is improved by 52.01% and 26.51% respectively compared with the other two methods, which verifies the effectiveness of the method.