ANSYS参数化编号控制问题

lcc1229

今天遇到一个问题，VSBA，NV,NA,SEPO,KEEPV,KEEPA——用面来分割体，一个体NV用一个面NA来分割后，NA面的编号却变化了（当然只是对某些体来说），不知大家遇没有遇到这个问题。按理说用面分割体后分割面NA是不变化的，只是体上有些被减去的面变化。大家可以试一下，看看是什么原因造成的？？？？？？？？？？？
附上命令VSBA:
VSBA, NV, NA, SEPO, KEEPV, KEEPA

Subtracts areas from volumes.

PREP7: Booleans

MP ME ST PR PRN <> <> FL EM EH <> PP <>

NV
Volume (or volumes, if picking is used) to be subtracted from. If ALL, use all selected volumes. If P, graphical picking is enabled (valid only in the GUI) and remaining fields are ignored. A component name may also be substituted for NV.

NA
Area (or areas, if picking is used) to subtract. If ALL, use all selected areas. A component name may also be substituted for NA.

SEPO
Behavior of the touching boundary:

(blank)  —  The resulting volumes will share area(s) where they touch.

SEPO  —  The resulting volumes will have separate, but coincident area(s) where they touch.



KEEPV
Specifies whether NV volumes are to be deleted:

(blank)  —  Use the setting of KEEP on the BOPTN command.

DELETE  —  Delete NV volumes after VSBA operation (override BOPTN command settings).

KEEP  —  Keep NV volumes after VSBA operation (override BOPTN command settings).



KEEPA
Specifies whether NA areas are to be deleted:

(blank)  —  Use the setting of KEEP on the BOPTN command.

DELETE  —  Delete NA areas after VSBA operation (override BOPTN command settings).

KEEP  —  Keep NA areas after VSBA operation (override BOPTN command settings).



Notes
Generates new volumes by subtracting the regions common to both the volumes and areas (the intersection) from the NV volumes. The intersection will be an area(s). If SEPO is blank, the volume is divided at the area and the resulting volumes will be connected, sharing a common area where they touch. If SEPO is set to SEPO, the volume is divided into two unconnected volumes with separate areas where they touch. See the Modeling and Meshing Guide for an illustration. See the BOPTN command for an explanation of the options available to Boolean operations. Element attributes and solid model boundary conditions assigned to the original entities will not be transferred to the new entities generated

lcc1229

是不是布尔运算后点，线，面，体的编号有可能无规律？