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发表于 2003-2-28 12:42:40
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来自 黑龙江哈尔滨
回复: 【求助】secwrite 如何命令输如
按HELP中步骤完全走一遍,再查看LOG文件,试试看!
If you need to define a cross section that is not common, you must create a user mesh file. To create a user mesh file, create a 2-D solid model and save it using the SECWRITE command (Main Menu> Preprocessor> Sections> Beam> Custom Sectns> Write From Areas). This procedure is outlined in greater detail below:
1、Create all areas (Main Menu> Preprocessor> Modeling> Create> Areas).
2、Overlap the areas (Main Menu> Preprocessor> Modeling> Operate> Booleans> Overlap> Areas) or glue them (Main Menu> Preprocessor> Modeling> Operate> Booleans> Glue> Areas) where appropriate.
3、Save the model.
4、Set the number of line divisions for all lines (Main Menu> Preprocessor> Meshing> Size Cntrls> ManualSize> Lines> Picked Lines or use the MeshTool).
5、Select Main Menu> Preprocessor> Sections> Beam> Custom Sectns> Write From Areas. A picker appears. Pick the area(s) of the cells.
6、ANSYS creates cells on the areas. ANSYS may display bad shape messages during the mesh - these messages can be ignored. However, you may see an "Unable to mesh area...." message. If you do, clear the elements from all areas (Main Menu> Preprocessor>Meshing> Clear> Areas) and repeat steps 4 and 5.
7、Write the .SECT file out to a unique name in the Write Section Library File dialog box and click on OK.
8、Read in the user mesh file (Main Menu> Preprocessor> Sections> Beam> Custom Sectns> Read Sect Mesh) to calculate the section properties. Material properties must be defined to calculate the cross section shear correction factors, material-weighted centroids and the shear centers.
Note
Even if you have already set LESIZE, you will see the following message:
Line element sizes may need to be specified for desired cross-section mesh. Please refer to the LESIZE command.
If you have already set the line element size, click on the Close button to continue. If you have not already set it, issue LESIZE with the appropriate information.
When creating cells on the area using the GUI, you do not need to define a plane element type. On the other hand, a plane element type must be defined if the user issues the SECWRITE command explicity. MESH200 with KEYOPT(1) = 7 and PLANE82 are the only valid plane element types. |
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