有限元FEMM讨论！！！

DAAS

下面引用由ttl020520在 2005/06/15 09:05am 发表的内容：
Daas兄，我就是输入的厂家BH曲线数据（edit BH curve）(不知Hc参数有什么用，改变好像不影响结果)，
结果这个项目可以，另一个项目直接调用这个磁钢（不输入BH数据）模拟出来就很小很小
finemotor可调用txt文件附件

Hc是矫顽力，磁钢的特性。
您提供的数据是这样子的曲线？？

好像和实际的有点不一样？

ttl020520

还没注意，是写错了
Y35
B：
0
0.11
0.14
0.2
0.4145
H：
0
10424
22361
70107
229200

yiwen

[这个贴子最后由yiwen在 2005/06/16 05:09pm 第 2 次编辑]

DAAS R';这个好象真的不支持3D的图，我真的有些失望；还有就是我还不明白你如何定义这条线还是用座标吗？
怎么上不了图了呢？？？？？？？？？？大小只有60K呀。SOS.......


DXF Import/Export
A common aspect of all preprocessor modes is DXF Import/Export. For interfacing with CAD
programs and other finite element packages, femm supports the import and export of the Auto-
CAD dxf file format. Specifically, the dxf interpreter in femm was written to the dxf revision 13
standards. Only 2D dxf files can be imported in a meaningful way.
To import a dxf file, select Import DXF off of the File menu. A dialog will appear after the
file is seleted asking for a tolerance. This tolerance is the maximum distance between two points
at which the program considers two points to be the same. The default value is usually sufficient.
For some files, however, the tolerance needs to be increased (i.e. made a larger number) to import
the file correctly. FEMM does not understand all the possible tags that can be included in a dxf
file; instead, it simply strips out the commands involved with drawing lines, circles, and arcs. All
other information is simply ignored.
Generally, dxf import is a useful feature. It allows the user to draw an initial geometry using
their favorite CAD package. Once the geometry is laid out, the geometry can be imported into
femm and detailed for materials properties and boundary conditions.
Do not despair if femm takes a while to import dxf files (especially large dxf files). The reason
that femm can take a long time to import dxf files is that a lot of consistency checking must be
performed to turn the dxf file into a valid finite element geometry. For example, large dxf files
28
might take up to a minute or two to import.
The current femm geometry can be exported in dxf format by selecting the Export DXF option
off of the File menu in any preprocessor window. The dxf files generated from femm can then be
imported into CAD programs to aid in the mechanical detailing of a finalized design, or imported
into other finite element or boundary element programs.

DAAS

yiwen兄，您好！
为啥发这么多E文过来了，头晕～～～
之前说过，FEMM支持平面及轴对称的规格。同时包括DXF格式的平面和轴对称剖面。
再试试看？

yiwen

DAASR’ 我想问一下你如何定义磁缝中间的那条线？？？

DAAS

下面引用由yiwen在 2005/06/16 10:24pm 发表的内容：
DAASR’ 我想问一下你如何定义磁缝中间的那条线？？？

之前我有和闲云讨论的，您可以留意一下？
可以预先画出来的：）

DAAS

ttl020520 兄，如果有空的话，可否再释放多几款实测的B-H数据出来呢？
谢谢！

发烧友-he

我还是不太明白怎么样可以导入到FIMEMOTO里去,前辈可否提示一二? FINEMOTO的菜单里好象没有这一项?

DAAS

给一个FINEMOTOR的截图来看看，
难道您的和我使用的有所不同？？？？？
应该是在按键里面的。

发烧友-he

剛才明白了從FEMM----FINEMOTOR的導入.
小弟有一問題: 在靜態下模擬所得的結果運用到動態中會有多少差異?