请教:LATT命令

yetta

LATT, MAT, REAL, TYPE, --, KB, KE, SECNUM
Associates element attributes with the selected, unmeshed lines.

KB, KE Beginning and ending orientation keypoints to be associated with selected, unmeshed lines. ANSYS uses the location of these keypoints to determine how to orient beam cross sections during beam meshing. Beam elements may be created along a line with a constant orientation by specifying only one orientation keypoint (KB), or a pre-twisted beam may be created by selecting different orientation keypoints at each end of the line (KB and KE). (For a line bounded by two keypoints (KP1 and KP2), the orientation vector at the beginning of the line extends from KP1 to KB, and the orientation vector at the end of the line extends from KP2 to KE. The orientation vectors are used to

我的问题就是怎样定这个orientation,这段话到底什么意思?
谢谢高手赐教~~

互相学习

这里的kb是定义梁截面方向的点编号，具体kb的定义你看看188、189、44单元及自定义beam截面的帮助内容，注意：一定要结合着几个图一起看，好好理解，最好是亲自试试。