【作者】 周丹晨；

【导师】 蒋玉明；

【作者基本信息】 四川大学 ， 材料加工工程， 2001， 硕士

【摘要】 铸件凝固过程数值模拟是提高铸件质量和铸造生产经济效益的重要方法和途径之一。本论文的主要任务是以有限元分析软件ANSYS作为二次开发平台，通过铸造专业知识、铸件凝固过程数值模拟知识以及计算机应用和开发知识的有机结合，初步开发出面向铸造工程师使用的铸件凝固过程温度场和应力场数值模拟软件，提高分析的效率，并进行缺陷预测与分析和铸造工艺的优化设计工作。 系统采用了三层开发体系层次结构，通过应用软件模块化、参数化设计、层次及网状数据结构及数据库等技术与方法，利用ANSYS的内部开发工具(APDL和UIDL)和外部开发工具(Visual C＋＋和Access)，并采用基于铸造合金和工艺设计知识库的向导式设计方法，以铸造行业中常用的铸铁、铸钢、铸造铝合金、铸造铜合金四类铸造合金为分析材料，主要针对砂型铸造，我们初步完成了铸件温度场／应力场仿真与工艺优化设计系统的设计与开发。 根据铸造工艺及铸件凝固过程数值模拟的特点，本文将系统划分为铸造工艺CAD、铸件凝固过程温度场数值模拟、铸件凝固过程应力场数值模拟和铸件缺陷预测及工艺优化四个模块。各子系统及其模块之间在功能上既相互独立，又相互联系，基本实现了信息集成。 系统涵盖了铸件成形过程数值模拟的主要内容，具有较强的完整性和系统性；面向铸造工程师的开发思路和大量铸造知识的有机融入，大大方便了铸造技术人员的操作和使用，也使系统具有专业化、实用化和用户化的鲜明特点，这些特点在实际设计与分析过程中得到了验证。更多还原

【Abstract】 The numerical simulation of casting solidification process is one of important methods and ways by which the casting quality and the economic benefits of foundry production can be raised. The main task of the thesis is that, depending on the finite element analysis software, or ANSYS, for the developing platform, the temperature field and stress field numerical simulation of casting solidification software, which is oriented to foundry engineers, will be preliminarily developed by systematically combining the knowledge of foundry, numerical simulation of casting solidification and application and development of computer. Based on the system, the efficiency of analysis will be improved, and the defect prediction and the optimization design of foundry technology will also be carried out.The three-floor hierarchy architecture of system development is adopted in the system. Primarily aiming at sand casting process, the system on temperature-field! stress-field simulation and technology optimization design for castings, in which cast iron, steel, alumirnun and copper which are most often used in the foundry industry are the major analysis materials, has been preliminarily designed and developed by applying the technologies and methods of software modularization, parametric design, hierarchy and reticulate data structure, database, internal developing tools of ANSYS (APDL and UIDL) and external developing tools (Visual C++ and Access). In addition, the guiding design method based on knowledge base of casting alloysand foundry technology design is also adopted.According to the characteristics of foundry technology and the numerical simulation of casting solidification process, the system is divided into four sub-systems: foundry technology CAD, the temperature-field numerical simulation of casting solidification process, the stress-field numerical simulation of casting solidification process, and the defect prediction and optimization design of foundry technology. Every sub-system and module is either independent or relevant one another in function, and the information integration is also basically realized.The system that includes the main numerical simulation contents of casting solidification process has the better integrality and systematization. Foundry engineers-oriented developing thought and systematical input of a great deal of foundry knowledge make it very convenient for foundry technicians to use and operate, and also demonstrate the outstanding characteristics of specialization, practicability, and customization. Furthermore, these characteristics have also been tested by actual design and analysis process.更多还原