發(fā)布時間：2018-06-03 14:02

  本文選題：船用柴油機 + 多學科設計優(yōu)化��； 參考：《東南大學》2015年博士論文

【摘要】：隨著現(xiàn)代船舶對船用柴油機綜合性能要求的提高,要求在其設計開發(fā)過程中綜合考慮各學科之間的耦合,提高船用柴油機的整體設計水平。本文針對船用柴油機關鍵件設計優(yōu)化問題,結合復雜系統(tǒng)建模理論,構建了基于多學科設計優(yōu)化(Multidisciplinary Design Optimization, MDO)的船用柴油機關鍵件多學科協(xié)同設計總體技術框架,對其涉及的復雜系統(tǒng)建模與分解、多學科優(yōu)化模型處理、多目標優(yōu)化決策等關鍵技術問題進行了研究。在此基礎上,結合CAD/CAE/CAO一體化集成的產(chǎn)品協(xié)同設計思想,開發(fā)了面向船用柴油機多學科設計優(yōu)化的快速設計集成系統(tǒng)平臺,從而有效地支持我國船用柴油機的設計和開發(fā)過程。論文開展的主要研究內容和成果包括：(1)基于復雜系統(tǒng)建模理論,提出了船用柴油機關鍵件多學科協(xié)同設計優(yōu)化總體技術框架,分析了相關關鍵技術,并建立了多層次的船用柴油機關鍵件多學科設計優(yōu)化模型及其求解策略。分析了船用柴油機結構設計涉及的結構強度、振動和熱學等學科設計要求,并從“產(chǎn)品級-系統(tǒng)級-部件級-零件級”四個層次對其結構設計的性能耦合與設計分析手段進行解析。(2)針對復雜系統(tǒng)多學科設計優(yōu)化的學科分析模型的精度問題,提出了考慮復雜結構結合面特性的多學科性能精細化仿真建模方法,并通過靜、動力學實驗對組合結構的非線性特性進行了系統(tǒng)研究；針對仿真分析模型的可重用性問題,提出了基于主模型的MDO多視圖建模方法,實現(xiàn)了基于多視圖模型的船用柴油機關鍵件多學科設計優(yōu)化。(3)針對多學科設計優(yōu)化的效率和精度的協(xié)調問題,提出了基于數(shù)據(jù)挖掘和知識發(fā)現(xiàn)的多學科優(yōu)化模型約簡方法。結合試驗設計和代理模型技術,完成了柴油機運動機構多學科優(yōu)化模型的簡化,實現(xiàn)了船用柴油機等復雜產(chǎn)品多學科優(yōu)化過程的精度和效率的有效協(xié)調。(4)針對多學科設計優(yōu)化中的目標決策問題,對經(jīng)典的多目標進化算法進行了比較研究,選取典型測試函數(shù)對其Pareto最優(yōu)化解集的分布性、魯棒性和運行效率等性能進行綜合了評價；提出了基于穩(wěn)健性設計的多目標組合優(yōu)化策略,提高了優(yōu)化算法的搜索效率和優(yōu)化解的可行性。以船用柴油機凸輪機構的優(yōu)化設計為對象,驗證了多目標優(yōu)化策略和優(yōu)化目標決策方法的有效性。(5)針對船用柴油機多學科設計優(yōu)化的多學科協(xié)同和過程集成問題,提出了面向多學科設計優(yōu)化過程的CAD/CAE/CAO一體化集成技術,開發(fā)了船用柴油機多學科設計優(yōu)化系統(tǒng)平臺,實現(xiàn)了復雜產(chǎn)品多學科設計優(yōu)化過程的集成和模型重用,優(yōu)化了國內船用柴油機制造企業(yè)的設計開發(fā)模式。
[Abstract]:With the improvement of the comprehensive performance of marine diesel engine in modern ships, it is necessary to consider the coupling between various disciplines in the process of design and development, so as to improve the overall design level of marine diesel engine. Aiming at the design optimization of key parts of marine diesel engine, combined with the theory of complex system modeling, the overall technical framework of multidisciplinary collaborative design for key parts of marine diesel engine based on multidisciplinary design optimization and multidisciplinary Design Optimization, MDO) is constructed in this paper. The key technical problems such as modeling and decomposition of complex system, multi-disciplinary optimization model processing and multi-objective optimization decision are studied. On this basis, a rapid design integration system platform for marine diesel engine multi-disciplinary design optimization is developed in combination with the product collaborative design idea of CAD/CAE/CAO integration, which effectively supports the design and development process of marine diesel engine in China. The main research contents and achievements in this paper include: (1) based on the theory of complex system modeling, the overall technical framework of multidisciplinary collaborative design optimization for key parts of marine diesel engine is proposed, and the relevant key technologies are analyzed. A multi-level multi-disciplinary design optimization model for key parts of marine diesel engine and its solution strategy are established. The structural strength, vibration and thermal design requirements of marine diesel engine are analyzed. From the four levels of product level, system level, component level and part level, the paper analyzes the performance coupling and design analysis means of its structure design, and aims at the precision of the subject analysis model of multidisciplinary design optimization of complex system. In this paper, a modeling method of multi-disciplinary fine performance simulation considering the characteristics of complex structure interface is proposed, and the nonlinear characteristics of the composite structure are systematically studied by static and dynamic experiments, and the reusability of the simulation analysis model is discussed. A multi-view modeling method of MDO based on main model is proposed. The multi-disciplinary design optimization of key parts of marine diesel engine based on multi-view model is realized. The coordination of efficiency and precision of multi-disciplinary design optimization is realized. A multidisciplinary optimization model reduction method based on data mining and knowledge discovery is proposed. Combined with experimental design and agent model technology, the multi-disciplinary optimization model of diesel engine motion mechanism is simplified. An effective coordination of the precision and efficiency of the multidisciplinary optimization process for marine diesel engine and other complex products is realized. Aiming at the problem of objective decision making in multidisciplinary design optimization, the classical multi-objective evolutionary algorithm is compared and studied. The typical test function is selected to evaluate the distribution, robustness and running efficiency of the optimal solution set of Pareto, and a multi-objective combinatorial optimization strategy based on robust design is proposed. The search efficiency of the optimization algorithm and the feasibility of the optimal solution are improved. Taking the optimization design of marine diesel engine cam mechanism as an example, the effectiveness of multi-objective optimization strategy and optimization objective decision method is verified. An integrated CAD/CAE/CAO integration technology for multidisciplinary design optimization process is proposed. The platform of marine diesel engine multidisciplinary design optimization system is developed, and the integration and model reuse of complex product multidisciplinary design optimization process are realized. The design and development mode of domestic marine diesel engine manufacturing enterprises is optimized.
【學位授予單位】：東南大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：U664.121
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本文編號：1973051