均匀性之间的映射“真正的”三维空间中和元素自身的“自然“坐标空间?

SANYAN68

Figure 2.5  Avoid Midside-to-Corner Node Connections Between Elements



For elements having midside nodes, it is generally preferred that each such node be located at the straight-line position halfway between the corresponding corner nodes. There are, however, situations where other locations may be more desirable:


Nodes following curved geometric boundaries will usually produce more accurate analysis results - and all ANSYS meshers place them there by default.

Even internal edges in some meshes may have to curve to prevent elements from becoming inverted or otherwise overly distorted. ANSYS meshers sometimes produce this type of curvature.


It is possible to mimic a crack-tip singularity with "quarter point" elements, with midside nodes deliberately placed off-center. You can produce this type of specialized area mesh in ANSYS by using the KSCON command (Main Menu> Preprocessor> Meshing> Size Cntrls> Concentrat KPs> Create).

Midside node positions are checked by the element shape test described below. (For information about controlling element shape checking, see Generating the Mesh of this manual.)

All solid and shell elements except 3-node triangles and 4-node tetrahedra are tested for uniformity of the mapping between "real" 3-D space and the element's own "natural" coordinate space. A large Jacobian ratio indicates excessive element distortion, which may or may not be caused by poorly located midside nodes. For details about Jacobian ratio tests, refer to the section on element shape testing in the Theory Reference for the Mechanical APDL and Mechanical Applications.


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红字处的翻译是否正确....

所有固体和壳元素都经过测试除了3节点三角形和4节点四面体以均匀性之间的映射“真正的”三维空间中和元素自身的“自然“坐标空间。

什么是~均匀性之间的映射“真正的”三维空间中和元素自身的“自然“坐标空间?

jackie.lee

翻译不对~~~
金山快译，还是网络翻译？

pfsr

是google 翻译

SANYAN68

翻译不对~~~
金山快译，还是网络翻译？
jackie.lee 发表于 2011-2-16 15:51

All solid and shell elements except 3-node triangles and 4-node tetrahedra are tested for uniformity of the mapping between "real" 3-D space and the element's own "natural" coordinate space. A large Jacobian ratio indicates excessive element distortion

除了3节点三角形和4节点四面体之外都经过测试
所有固体和壳元素之间一致性对应连结
“真实”三维空间中和元素自身的“自然“坐标空间。

這樣對嗎? 但还是不懂它的意思?