摘要
多学科可靠性设计优化被认为是解决不确定性因素影响下复杂产品设计优化问题的有效方法。然而,目前的多学科可靠性设计优化仍是嵌套或顺序执行模式,易造成复杂产品设计时学科自治性差、效率低等问题。因此,为提高多学科可靠性设计优化的学科自治性及计算效率,提出一种多学科协同可靠性设计优化方法。该方法基于性能测量法建立多学科优化的可靠性约束,利用KKT条件将多学科可靠性约束等效为确定性约束,并以等效后的多学科约束为基础,将多学科可靠性设计优化问题分解为几个并行的单学科优化问题,利用一致性约束对各学科进行协调,实现多学科可靠性设计优化的并行求解。数值算例和复合缸设计优化问题用来验证所提方法的可行性和有效性。
Reliability-based multidisciplinary design optimization(RBMDO)has been considered as the efficient method for addressing the optimization problems of complex production under uncertainties.However,due to the nested or sequential optimization process,the current RBMDO methods cannot extend design autonomy to various disciplines,and their computational efficiency is also limited.A multidisciplinary collaborative reliability design optimization method(MCRDO)is proposed to solve the problems of design autonomy and computational efficiency of the current RBMDO.In the proposed MCRDO,the multidisciplinary reliability constraints are constructed based on the performance measure approach(PMA),and subsequently these constructed reliability constraints are transformed into deterministic multidisciplinary constraints by using the KKT conditions;then,on the basis of the transformation,the optimization problem of RBMDO is decomposed into several design optimization problems of single discipline,which are performed in parallel,and the results of these single disciplinary optimizations are coordinated by the consistency constraints in a system level optimization.The MCRDO can achieve the parallel solution of the optimization problem of multidisciplinary reliability design.A numerical example and the design optimization of compound cylinder are used to verify the feasibility and effectiveness of the proposed method.
作者
孟欣佳
张立香
王晓敏
MENG Xin-jia;ZHANG Li-xiang;WANG Xiao-min(College of Mechanical and Equipment Engineering,Hebei University of Engineering,Hebei Handan 056000,China)
出处
《机械设计与制造》
北大核心
2022年第12期108-112,119,共6页
Machinery Design & Manufacture
基金
河北省青年科学基金资助项目(E2018402229)
邯郸市科技研发计划项目(1721203048-3)。
关键词
多学科可靠性设计优化
性能测量法
协同
KKT条件
并行求解
Reliability-Based Multidisciplinary Design Optimization
Performance Measure Approach
Collaboration
KKT Condition
Parallel Solution
