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Chapter 5

Chapter 5. ANSYS 命令 : 基礎與觀念 Fundamentals and Concepts. Contents. 5.1 ANSYS 命令分類 Classification of ANSYS Commands 5.2 準備工作 Set Up Commands 5.3 ANSYS 數學式 ANSYS Expressions 5.4 座標系統 Coordinate Systems 5.5 模型的元件及選擇 Model Entities and Selections. 第 5.1 節. ANSYS 命令分類

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Chapter 5

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  1. Chapter 5 ANSYS命令: 基礎與觀念 Fundamentals and Concepts

  2. Contents 5.1 ANSYS命令分類 Classification of ANSYS Commands 5.2 準備工作 Set Up Commands 5.3 ANSYS數學式 ANSYS Expressions 5.4 座標系統 Coordinate Systems 5.5 模型的元件及選擇 Model Entities and Selections

  3. 第5.1節 ANSYS命令分類 Classification of ANSYS Commands

  4. 5.1.1 ANSYS程序結構

  5. 5.1.2 ANSYS命令分類 Chapter 5 Chapter 6 Chapter 7

  6. 第5.2節 準備工作 Set Up Commands

  7. 5.2.1 ANSYS資料庫與檔案結構 Jobname.DB Model Loads Database Result Model Loads Jobname.RST Result Result at t1 Result at t2 etc.

  8. 5.2.2 Set Up 命令

  9. 5.2.3 進入與離開模組

  10. 第5.3節 ANSYS數學式 ANSYS Expressions

  11. 5.3.1 ANSYS數學式

  12. 5.3.2 參數名稱 • Grammatically similar FORTRAN variable names. • The first 8 letters are significant. • Example of legal names are: ABC, PI, X_OR_Y. • Examples of illegal names are: NEW_VALUE, 2CF3, M&E.

  13. 5.3.3 ANSYS運算符號

  14. 5.3.4 ANSYS數學函數(FORTRAN-Like Functions)

  15. 5.3.5 ANSYS “GET” Functions

  16. 第5.4節 座標系統 Coordinate Systems

  17. 5.4.1 為什麼需要座標系統? • When construct a model, you need a CS to refer to. • For various purpose, more than one CS’s are preferable. • In ANSYS, CS’s are stored in a CS table.

  18. (0) Cartesian (X,Y,Z) (1) Cylindrical (R,q,Z) (2) Spherical (R,q,f) (5) Cylindrical (R,q,Y) 5.4.2 Global Coordinate Systems (Predefined CS)

  19. 5.4.3 Local Coordinate System (User-defined CS) To defined a local CS, you need to specify • The CS type (e.g., Cartesian) • Position of origin in global CS • Directions of the 3 axes

  20. 5.4.4 CS Table

  21. 5.4.5 Working Plane • WP is a predefined CS (no. 4) which is always coincident with the Active CS. • Many commands are available to manipulate the WP. • WP can be used as dynamic Local CS. • Primitives are created referring to WP.

  22. 5.4.6 Use of CS’s • Active CS • Element CS • Nodal CS • Result CS • Display CS

  23. 5.4.7 CS Table 命令

  24. 5.4.8 指定座標系統 (a) Parallel to global cartesian CS (Default) (b) Parallel to a local cylindrical CS (c) Parallel to global cylindrical CS

  25. 5.4.9 Working Plane 命令

  26. 第5.5節 模型的元件及選擇 Model Entities and Selections

  27. 5.5.1 Model Entities • Entities to construct a solid model consist of keypoints, lines, areas, and volumes. • Entities to construct an analysis model consist of nodes and elements. • The hierarchical relations (from bottom to top) are: keypoints-lines-areas-volumes-nodes-elements.

  28. 5.5.2 Selection of Entities (1/3)

  29. 5.5.2 Selection of Entities (2/3) NSEL, Type, Item, Comp, VMIN, VMAX, VINC

  30. 5.5.2 Selection of Entities (3/3)

  31. 5.3.3 Entities Selection Commands

  32. 5.5.4 Components

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