Computer simulation for materials processing needs a huge database containing a great deal of various physical properties of materials. In order to employ the accumulated large data on materials heat treatment in the ...Computer simulation for materials processing needs a huge database containing a great deal of various physical properties of materials. In order to employ the accumulated large data on materials heat treatment in the past years, it is significant to develop an intelligent database system. Based on the data mining technology for data analysis, an intelligent database web tool system of computer simulation for heat treatment process named as IndBASEweb-HT was built up. The architecture and the arithmetic of this system as well as its application were introduced.展开更多
A general methodology for developing intelligent CAE systems is presented, which is based on a so-called Model Based Reasoning Approach (MBRA) in knowledge engineering. Generic features of CAE systems are described, a...A general methodology for developing intelligent CAE systems is presented, which is based on a so-called Model Based Reasoning Approach (MBRA) in knowledge engineering. Generic features of CAE systems are described, and a generic model for the architecture of CAE systems with these generic features is then presented. A model-based reasoning approach is modified for implementing the generic model. A case for developing a computer system for the mechanism design based on a specific finite element theory is used to explain the methodology.展开更多
The intensive competition of automotive market requ ir es shortening the product development circle and improving the product quality. Many of auto manufacturers in china have introduced some CAD/CAE/CAM systems in pr...The intensive competition of automotive market requ ir es shortening the product development circle and improving the product quality. Many of auto manufacturers in china have introduced some CAD/CAE/CAM systems in product development process, and have got some success. But the special and effi cient CAD system aimed at particular product is absent. This paper provides a CA D/CAE system that can realize the integration of CAD and CAE process for engine connecting rod development. The paper discusses some general methods in connecting rod design process, and s ums up structure characteristics of connecting rod. It introduces feature defini tion and feature classification facing connecting rod CAD/CAE system. Based on t he study of the feature technology and the feature of connecting rod, it creates the feature information model and feature database of engine connecting rod . In addition, it creates the parametric model of engine connection rod and real izes variable parametric design and variable structure design. With the help of Pro/Toolkit and Using C++ program to call the user ’s toolbox of Pro/ Engineer software system, the connecting rod CAD/CAE syst em can create connecting rod model automatically to meet the needs of different structure and different type of connecting rod. Based on Pro/Mechanica platform of PTC, the system can implements the Finite Ele ment Analysis and optimization of the connecting rod. Because using the same database in design and analysis, no data lost and no error occurs during da ta transforming. Using the connecting rod CAD/CAE system, the connecting rod can be meshed automatically and the FEA result can be achieved very fast and is very similar to the experiment. In a word, the connecting rod CAD/CAE system developed in this paper can optimiz e the product development process, realize the data share and concurrent enginee ring in the product design and analysis process, shorten the product develop ment circle, and improve the efficiency.展开更多
目的为了适应铸造CAE技术的网络化趋势,满足铸造CAE系统前置处理模块对STL模型高级渲染的功能性需求,开发一款足以媲美OpenGL渲染环境下复杂三维图形渲染效果的Web版的STL模型查看器程序——STLViewer。方法仿效Windows桌面程序的运行...目的为了适应铸造CAE技术的网络化趋势,满足铸造CAE系统前置处理模块对STL模型高级渲染的功能性需求,开发一款足以媲美OpenGL渲染环境下复杂三维图形渲染效果的Web版的STL模型查看器程序——STLViewer。方法仿效Windows桌面程序的运行方式和界面风格,选择单页面设计方案。选用Visual Studio 2019开发平台,利用HTML5、CSS3和JavaScript技术设计程序界面。深入研究基于WebGL的STL模型可视化技术,按照依托场景环境活动模型渲染的技术路线,进行STLViewer各功能模块的开发。结果设计并实现了STLViewer,该程序功能完整性良好、内部逻辑结构合理高效。STLViewer融隐式交互和显式交互于一体,具有本地STL模型的随机性访问、活动模型的多样化交互、模型姿态的智能化跟踪、视图动画的多方式呈现、模型导出的便捷化操作等特点,实现了网络环境下STL模型的高级渲染功能。结论STLViewer作为一款性能卓越的STL模型查看器程序,既可辅助用户制订合理的网格剖分方案,又能带来优良的用户体验,在实际应用中得到了良好效果。展开更多
Concurrent engineering is needed to modernize the foundry industry and to reduce the scrap from castings and thus increase the economic profit. This paper presents an integrated 3-D CAD/CAE system for a foundry using...Concurrent engineering is needed to modernize the foundry industry and to reduce the scrap from castings and thus increase the economic profit. This paper presents an integrated 3-D CAD/CAE system for a foundry using concurrent engineering which considers casting structure, casting type, and manufacturing properties in the CAD module to design the pouring system, the riser, the chill core and so on. A visualized solid model is developed for the casting component with the model design enhanced by CAE analysis. Heat transfer and fluid flow simulation are used to analyze the initial design. The whole product development process is analyzed using concurrent engineering methods. The application shows that the integrated system can improve the efficiency of the design and manufacturing process of die casting.展开更多
文摘Computer simulation for materials processing needs a huge database containing a great deal of various physical properties of materials. In order to employ the accumulated large data on materials heat treatment in the past years, it is significant to develop an intelligent database system. Based on the data mining technology for data analysis, an intelligent database web tool system of computer simulation for heat treatment process named as IndBASEweb-HT was built up. The architecture and the arithmetic of this system as well as its application were introduced.
文摘A general methodology for developing intelligent CAE systems is presented, which is based on a so-called Model Based Reasoning Approach (MBRA) in knowledge engineering. Generic features of CAE systems are described, and a generic model for the architecture of CAE systems with these generic features is then presented. A model-based reasoning approach is modified for implementing the generic model. A case for developing a computer system for the mechanism design based on a specific finite element theory is used to explain the methodology.
文摘The intensive competition of automotive market requ ir es shortening the product development circle and improving the product quality. Many of auto manufacturers in china have introduced some CAD/CAE/CAM systems in product development process, and have got some success. But the special and effi cient CAD system aimed at particular product is absent. This paper provides a CA D/CAE system that can realize the integration of CAD and CAE process for engine connecting rod development. The paper discusses some general methods in connecting rod design process, and s ums up structure characteristics of connecting rod. It introduces feature defini tion and feature classification facing connecting rod CAD/CAE system. Based on t he study of the feature technology and the feature of connecting rod, it creates the feature information model and feature database of engine connecting rod . In addition, it creates the parametric model of engine connection rod and real izes variable parametric design and variable structure design. With the help of Pro/Toolkit and Using C++ program to call the user ’s toolbox of Pro/ Engineer software system, the connecting rod CAD/CAE syst em can create connecting rod model automatically to meet the needs of different structure and different type of connecting rod. Based on Pro/Mechanica platform of PTC, the system can implements the Finite Ele ment Analysis and optimization of the connecting rod. Because using the same database in design and analysis, no data lost and no error occurs during da ta transforming. Using the connecting rod CAD/CAE system, the connecting rod can be meshed automatically and the FEA result can be achieved very fast and is very similar to the experiment. In a word, the connecting rod CAD/CAE system developed in this paper can optimiz e the product development process, realize the data share and concurrent enginee ring in the product design and analysis process, shorten the product develop ment circle, and improve the efficiency.
文摘目的为了适应铸造CAE技术的网络化趋势,满足铸造CAE系统前置处理模块对STL模型高级渲染的功能性需求,开发一款足以媲美OpenGL渲染环境下复杂三维图形渲染效果的Web版的STL模型查看器程序——STLViewer。方法仿效Windows桌面程序的运行方式和界面风格,选择单页面设计方案。选用Visual Studio 2019开发平台,利用HTML5、CSS3和JavaScript技术设计程序界面。深入研究基于WebGL的STL模型可视化技术,按照依托场景环境活动模型渲染的技术路线,进行STLViewer各功能模块的开发。结果设计并实现了STLViewer,该程序功能完整性良好、内部逻辑结构合理高效。STLViewer融隐式交互和显式交互于一体,具有本地STL模型的随机性访问、活动模型的多样化交互、模型姿态的智能化跟踪、视图动画的多方式呈现、模型导出的便捷化操作等特点,实现了网络环境下STL模型的高级渲染功能。结论STLViewer作为一款性能卓越的STL模型查看器程序,既可辅助用户制订合理的网格剖分方案,又能带来优良的用户体验,在实际应用中得到了良好效果。
基金Supported by the National Natural Science Foundation of China(No.59990470)
文摘Concurrent engineering is needed to modernize the foundry industry and to reduce the scrap from castings and thus increase the economic profit. This paper presents an integrated 3-D CAD/CAE system for a foundry using concurrent engineering which considers casting structure, casting type, and manufacturing properties in the CAD module to design the pouring system, the riser, the chill core and so on. A visualized solid model is developed for the casting component with the model design enhanced by CAE analysis. Heat transfer and fluid flow simulation are used to analyze the initial design. The whole product development process is analyzed using concurrent engineering methods. The application shows that the integrated system can improve the efficiency of the design and manufacturing process of die casting.
