【作者】 雷翠翠；

【导师】 汤方平；

【作者基本信息】 扬州大学 ， 水利水电工程， 2009， 硕士

【摘要】 多学科设计优化(Multidisciplinary Design Optimization, MDO)技术是20世纪90年代以来在国外迅速发展起来的一门学科,它可以有效地解决大规模复杂工程系统的设计优化问题,特别是在航空航天领域有着广阔的应用前景。在我国,多学科设计优化技术的研究还处于起步阶段,尤其在水泵叶轮设计优化方面,传统的设计方法是先进行水力性能设计,然后在此基础上考虑结构学科的设计,按照这种模式得到的结果往往只是局部最优解,而非全局最优。本文以此为契机,探索了多学科设计优化方法的理论和方法。本文以多学科设计优化方法理论以及MDO方法在水泵叶片设计优化中的应用为核心,主要进行了如下研究:1、对现有的六种多学科设计优化方法进行了研究,清晰地描述了各种方法的数学模型和算法结构,并给出了结构框架图,分析了各自的适用范围以及优缺点,重点研究了协同优化方法(Collaborative optimzation,CO);对多学科设计优化技术中的优化策略进行了综合研究,给出了选择方法;利用Isight优化平台对某算例进行CO优化,证实多学科设计优化方法的高效可行性;2、对水泵叶片多学科设计优化中涉及到的两个学科——水力性能和结构,进行学科分析,分别建立两个学科的数学模型;3、对水泵叶片的水力性能和结构进行协同优化分析,实现了同时满足转轮效率最高和叶片重量最轻的目标。更多还原

【Abstract】 Multidisciplinary Design Optimization (MDO) technology is a discipline which has been rapidly developed in abroad since 1990s, for which could effectively solve large-scale and complex problems concerning design and optimization of engineering system, which would have a wide application potential especially in the field of aerospace engin- eering. In our country, MDO technology is still in its early stages, particularly in the pump impeller blade’s design and optimization. The traditional design method is firstly to carry out the design of hydraulic performance, then consider the design of the structure of subjects, but the results using above model is only a partial optimal solution rather than the global optimum. The thesis takes it as an opportunity to explore the theory and method of multidisciplinary design optimization.The thesis takes multidisciplinary design optimization technology and application of the pump impeller blade’s design and optimization as its core, the following research has been carried out:1、The thesis studies existing six MDO methods and clearly describes the mathematical model and algorithms structure of each method, and given the structure of the framework map, the thesis also analyzes the scope of application as well as advantage and disadvantage of each method. Key study focuses on the Collaborative Optimization,optimize strategy of multidisciplinary design optimization technology adopts comprehensive studies, and giving out selection methods. The thesis makes use of the ISIGHT software to optimize the CO, which confirms efficient a??easibility of multidisciplinary design optimization method.2、The thesis carries out contributing analysis on hydraulic performance and structural subjects, two disciplines involved in multidisciplinary design optimization of Pump blades, and establish a mathematical model of two disciplines.3、The thesis adopts collaborative optimization analysis on hydraulic performance and structure of pump impeller blade, and successfully realizes the target of best efficiency of the pump impeller blade, meanwhile has the lightest weight of leave.更多还原