20xx届硕士研究生学位论文摘要机械电子工程论文题目：物理气相沉积ti(编辑修改稿)

20xx届硕士研究生学位论文摘要机械电子工程论文题目：物理气相沉积ti(编辑修改稿)内容摘要：

traditional method to validate its effectivity. (3) A new process parameters diagnosis method based on the fisher contribution plot was presented according to the principle of Fisher discriminant analysis. The new method and PCA contribution plot were all applied to the quadrupletank process to diagnose process parameters. The diagnosis results showed the difference of the two methods. (4) The production flow of CSP production line was described briefly, then the method of quality diagnosis based on neural works was applied to CSP production line to validate its feasibility and effectivity . Finally, the thesis was concluded with a summary and the prospect of the quality diagnosis theory was discussed. Key words： Quality Diagnosis, PCA, Neural Networks, Fisher Contribute Plot. 论文题 目： 基于 Web 的面向产品开发过程的客车 PDM 系统的研究与开发 Research and Development of PDM System on Bus Oriented to Product Developing Process Based on the Web 研究生姓名： 王翠表 导师姓 名： 李 强 教授 专 业： 机械电子工程 摘 要 ： 分析了国内外产品数据管理系统的特点，结合客车行业的实际需求以及对客车产品开发过程数据信息的全面分析，运用 Web 技术，分布式数据库技术、面向对象技术、成组技术，开展了基于 Web 的面向产品开发过程的客车产品数据管理系统的研究与开发。 8 在对客车行业产品开发部门进行需求分析的基础 上，运用软件工程方法，对系统进行了分析与设计，规划了系统实现的网络体系结构，并对其安全策略进行了研究；利用成组技术及相似性原理，对客车零部件进行了合理的分类，建立了客车零件数据库；应用文档管理的方法，对客车产品开发过程中的文档进行了分类管理，建立了图文档数据库；运用 ASP 和 ODBC 技术对系统进行了开发，实现了客车产品数据的管理和查询；考虑到该系统是面向产品开发过程的数据管理，其安全性的重要，建立了用户管理子系统，提高了系统的安全性。 通过系统实例，给出了应用本系统的过程与方法。 基于 Web 的面向产品开发过程的 客车产品数据管理系统的建立对客车企业的信息化建设具有重要的意义，是客车企业技术部门实现资源共享、数据继承以及并行工程的基础，它的实施将提升客车企业的技术管理水平，为企业 CIMS 建设打好基础。 关键词 ：客车；产品开发；产品数据管理系统； Web； ASP ABSTRACT Analyzing the characteristic of the PDMS inside and outside china, through the factual demand of the bus vocation and based on the whole analysis of data information of the bus product developing process, using Web technology, distributed database, ObjectOriented technology, and group technology, the product data management system on bus oriented product developing process based on web is studied. Based on the demand analysis of the department of product development in bus enterprises, using the software engineering method, the system is designed. The work system structure of the system implement is laid out and the safety strategy of the system is studied. Using group technology and parability principle, the bus and its parts are classified in reason and bus database is created. Using the method of the document management, the documents in product developing process are managed and the documents database are constructed. Using ASP and ODBC technology, the system is developed and the product data of the bus is managed and searched. Because the data management system is oriented to the product developing process, the safety of it is very important. Users management subsystem is structured for enhancing the safety of the whole system. By the system example, the process and method of using the system is presented. It has important significance to creating the data management system oriented to product developing process based on the web for the digitalization of the bus enterprises and lays a foundation for the resource share, data inherit and CE of the technology department in bus enterprise. Implementing the system will upgrade the technology management and make the base of the CIMS of bus enterprise. Key words: Bus。 Product development。 Product Data Management System。 Web。 ASP 9 论文题 目： 热轧带钢轧机工作辊热应力的研究 Thermal Stress Study of Work Roll in Hot Strip Mill 研究生姓名： 韩继铖 导 师姓 名： 任学平 教授 专 业： 机械电子工程 摘 要： 热轧带钢轧机工作辊的热变形直接影响着承载辊缝的形状，从而影响着受轧带钢板型质量的好坏。 同时工作辊由于受周期性温度的作用，特别是工作辊表面受到瞬态周期性的热冲击，内部产生热应力。 在这些周期性热应力的作用下，工作辊表面会产生热疲劳，产生疲劳裂纹而导致工作辊断裂或失效。 因此，定性和定量确定热应力显得尤为重要，准确计算工作辊的温度场是计算其热应力的前提。 在工作辊温度场的求解计算中，由于热传导和热变形行为的复杂性，求解工作辊温度场一直是带钢轧制研究领域的 薄弱环节。 工作辊温度场的求解方法有解析法、数值法和实测法等，但由于热轧工作辊工作条件极其恶劣和复杂，解析法和实测法等都没有令人满意的结果。 因此该领域研究重点是数值法，包括差分法和有限元法。 本文就是利用 ANSYS 有限元分析软件对热轧带钢工作辊的温度场和热应力进行解析。 在温度场的计算中采用 Solid70 热单元进行解析，对工作辊施加第三类边界条件载荷，得出工作辊不同时间的 ISO 方向温度图和温度等高线图，以及工作辊表面不同深度下的温度分布曲线图。 在工作辊热应力计算中，采用 Solid45 结构单元进行解析，把温度作为载 荷施加到结构单元上，得到工作辊径向、轴向、剪切方向以及 Von Mises 等效热应力的热应力等值线分布图。 本文还针对某厂 2025 热轧带钢轧机工作辊进行了计算机仿真，仿真结果与文献中的实验数据有很好的一致性，从而验证了本文模型计算的正确性。 其结果可以为板型控制和工作辊寿命计算分析提供理论依据。 关键词 ：工作辊 温度场 热应力 有限元 ABSTRACT The thermal deformation of hot rolled strip work roll influenced directly not only the shape of roll gap but also the quality of strip. It was shown that there were greater thermal stress formed within work roll with periodical temperature imposed, especially instantaneous thermal impact . The thermal stress led to thermal fatigue on roll surface. As a result, the fatigue crack made the roll break and disable. Therefore, It was importance that confirm the thermal stress qualitatively and quantificational and the accurate putation of temperature field was the base of the putation of thermal stress. 10 The putation on temperature field of work roll was a key because of the plexity of thermal conduction and thermal deformation during hot strip rolling. The algorithm included analytical method, numerical method and measurement method, and so on. The oute resulted from analytical method and measurement method were dissatisfied due to the wicked and plicated work condition of work roll. So researchers put an emphasis on the numerical method, which included difference method and FEM. This paper analyzed temperature field and thermal stress on the surface of hot rolled strip work roller with the help of ANSYS software. We imposed the third boundary condition load on work roll with Solid70 thermal element resolution during puting temperature field. The result showed that ISO direction temperature changes with time, temperature contour line, and temperature graph with different depth on the surface of work roll. Moreover, we got Von Mises equivalent thermal s。