【作者】 张苗；

【导师】 潘柏松；

【作者基本信息】 浙江工业大学 ， 机械设计及理论， 2010， 硕士

【摘要】 产品是一个系统,往往由几个子系统组成,系统性能决定了产品质量,而产品性能取决于产品设计。在产品设计过程中,分性能之间,子系统之间,各参数之间相互耦合,关系之复杂性、网络性、模糊性和动态性凸显。因此,研究产品性能及其系统的协同优化方法与技术具有重要的理论和工程意义。本文以装订设备为研究对象,研究了性能优化设计理论,规划系统优化设计进程,确定了耦合子系统之间的协同优化机制,通过合理优化使装订设备整机性能显著提高。本文的主要工作和研究结果如下:1.综述了产品性能优化设计技术的研究现状,通过分析装订设备的发展状况,提出了论文的研究内容,以及装订设备优化设计实现的技术路线。2.研究了机械产品的全性能优化建模和协同优化方法,并以具体算例完成了协同优化方法在iSIGHT平台上的实现,为系统性能协同优化设计的实现提供依据。完成了装订设备的性能优化建模,在总体性能优化进程规划确立的前提下,探索了多种装订设备的性能优化求解策略。3.针对打孔刀的工作性能和结构特点,研究单目标和多目标的寻优方法,并以iSIGHT软件作为优化平台,采用正交试验设计、Kriging近似模型及组合优化策略进行多目标优化求解,既保证了切纸性能,也兼顾了安全指标。最后,通过参数化数字模型验证了优化结果符合预期结果。4.针对装订设备的综合性能设计要求,基于人机工程学原理,提出了手柄作用力的舒适度曲线。并根据子系统间的参数耦合关系,建立了基于工作安全性、操作宜人性、结构紧凑性的系统性能协同优化数学模型,最后通过建立一致性约束,实现了优化求解的自动化。优化结果表明:切纸力减小了27.4%,手柄上的最大作用力降低了50.9%,同时手柄作用力曲线的变化趋势符合优化预期。通过实物打样,经综合测试平台的测试,优化后的理论曲线和实测曲线变化趋势十分吻合,表明协同优化方法可行,手柄作用力的舒适度曲线可信可靠。5.由于精冲板的结构不规则,精确的优化数学模型较难建立,本文采用iSIGHT软件集成Ansys有限元分析软件进行具体结构的优化分析。优化后,在满足结构强度和刚度的要求下,精冲板的体积(质量)减小了19.8%,并通过对精冲板过孔变形的分析和位移的计算,验证了优化后的精冲板在工作过程中产生的变形量不会影响装订设备的工作性能。最后,基于整机的优化结果,研究了装订设备在一个作业过程中,精冲板在打孔刀的动态载荷作用下,其应力和挠度的变化过程,并做了简要的疲劳分析,为将来的整机的可靠性研究打下基础。更多还原

【Abstract】 Product is a certain system which is made of several subsystems. The product’s quality is determined by the performance of the system and whether the capability is good or not is determined by the design. In the cause of design, different performance, subsystems and parameters are coupling to form a really complicated network with fuzziness and dynamic as its characters. Therefore, studies on the product’s performance and the effective ways for collaborative optimization of system have some value in theory research and engineer application.With binding machine as its target, this dissertation is about the design theory for performance optimization, the course for optimization design and the algorithm for collaborative optimization of coupling subsystems is defined which helps to greatly upgrade the entire performance of the binding machine. Main work are as follows:1. By analysis for the development of binding machine and the study status home and abroad of the optimization technology, the contents of the study and the scheme of the optimal design for binding machine unit is given.2. By studying on the full performance optimization modeling for the product and the theory of collaborative optimization. A concrete sample is operated successfully on the iSIGHT platform which provide basis for later study on the collaborative optimization way based on the systematic performance. Besides, the collaborative optimization way and various kinds of strategy performance optimization are put forward.3. According to the unique work performance and structure character of punching blade, a robust design methodology combining design of experiment (DOE),Kriging model technique and the strategy of optimization combination embodied in iSIGHT software are investigated for the design optimization. It guarantees the performance of punching whiling giving attention to the safety.4. Guided by the design demand for the systematic performance of the binding machine, a curve on comfort is put forward, which is based on the theory of human engineering. The subsystems are designed with the aim of safe work, delightful operation and close structure and the collaborative optimization mathematical model based on systematic performance is built on the study of the coupling relation of parameters in different subsystems. Finally, by setting up coherence restriction, the automation of solution is realized. The result shows that the force for punching reduces by 27.4%, the max acting force of human reduces by 50.9% and meanwhile, the developing trend of the acting force of human with the travel of punching conforms with the expect.5. Aim at the supporting module, integration with iSIGHT and Ansys is adopted, for the precise mathematical model is hard to establish with the irregular structure. After optimization, the bulk (quality) of ban is reduced by 19.8% whiling conforming to the intension and stiffness demand. And the fact that the opitimized ban’s bending won’t affect the performance of binding machine is verified after the analysis and calculation on the holes displacement. Finally, based on the optimization result of the entire machine, the change cause of stress and flexivity during punching is studied and a brief analysis on fatigue is is rendered which will lay the basis for the reliability study of an entire machine in the future.更多还原