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发表于 2009-4-22 22:47:16
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来自 广东广州
问题:This model requires more scratch space than urrently available.
please shutdown other running applications an click RETRY to have ANSYS try to get more memory.
Current allocation attempt:72088380 words(275MB)
解决方法:
Using manual ANSYS memory settings to improve performance
Background
The total memory used by ANSYS is called "Workspace" and is divided into two parts: "Database" and "Scratch space":
Workspace = Database + Scratch space
The database is used for storing such information as element and node data, material properties, etc, and is used in pre- and postprocessing.
The scratch space is used for storing matrices and temporary results when performing the actual solution.
If you can set up a problem but run out of memory when solving, the scratch space needs to be increased.
If solving goes well but pre- or postprocessing is very slow, the database should be increased.
Where to set
ANSYS Classic: Start ANSYS Product Launcher. Switch to the Customization/Preferences tab. Mark "Use Custom Memory Settings" and specify values. Then start ANSYS.
ANSYS Workbench version 10 and older: Mark "Solution" in the model tree. In the Details box to the lower left, choose Solver Process Settings > ANSYS Memory Settings and switch from "Program Controlled" to "Manual".
ANSYS Workbench version 11: Go to Tools > Solve Process Settings and click Advanced.
Guidelines for best values
Workspace should be set to the largest value the computer hardware permits. Finding this value involves some trial-and-error. With ANSYS Classic, the program will not start at all if the value is set too high. In Workbench, solution will be halted almost immediately after pressing "Solve". Note 1: On Windows 32-bit systems, the RAM will be "fragmented" in such a way that it is rarely possible to make use of more than about 1500 MB even if the RAM is significantly higher. Note 2: Manually setting workspace may trigger a warning message which can safely be ignored.
If ANSYS complains about insufficient memory while solving, the scratch space needs to be increased. It is not set explicitly, but is indirectly increased by reducing the database. The default database is 256 MB and one can try with something as low as 50 MB to allow more room for the scratch space.
However, if the database is set too small, pre- or postprocessing can become extremely slow or fail to work at all. |
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