采用VOFFST命令，扩展成不同长度的体，为什么长度太长会无法进行boolean操作

samlin

RT，我输入代码如下：
finish
/clear
/filname,LED tube-600mm
/title,LED tube-600mm
/prep7
keyw,pr_therm,1
et,1,solid70
mp,kxx,1,0.1558
mp,dens,1,2.7
mp,c,1,0.000963
pcirc,12.8,0,0,360
pcirc,12.8,0,-41,41
aovlap,all
adele,3
/pnum,area,1
aplot,all
pcirc,12.8,0,41,49!大鳍片-8
pcirc,12.8,0,49,56!空隙-1-7
pcirc,12.8,0,56,59!小鳍片-1-3
pcirc,12.8,0,59,66!空隙-2
pcirc,12.8,0,66,69!小鳍片-2
pcirc,12.8,0,69,76!空隙-3
pcirc,12.8,0,76,79!小鳍片-3
pcirc,12.8,0,79,86!空隙-4
pcirc,12.8,0,86,89!小鳍片-4
pcirc,12.8,0,89,96!空隙-5
pcirc,12.8,0,96,99!小鳍片-5
pcirc,12.8,0,99,106!空隙-6
pcirc,12.8,0,106,109!小鳍片-6
pcirc,12.8,0,109,116!空隙-7
pcirc,12.8,0,116,119!小鳍片-7
pcirc,12.8,0,119,126!空隙-8
pcirc,12.8,0,126,129!小鳍片-8
pcirc,12.8,0,129,136!空隙-9
pcirc,12.8,0,136,139!小鳍片-9
pcirc,12.8,0,139,146!空隙-10
pcirc,12.8,0,146,149!小鳍片-10
pcirc,12.8,0,149,156!空隙-11
pcirc,12.8,0,156,159!小鳍片-11
pcirc,12.8,0,159,166!空隙-12
pcirc,12.8,0,166,174!大鳍片-2
pcirc,12.8,0,174,186!大空隙----中间线
pcirc,12.8,0,186,194!大鳍片-3
pcirc,12.8,0,194,201!空隙-13
pcirc,12.8,0,201,204!小鳍片-12
pcirc,12.8,0,204,211!空隙-14
pcirc,12.8,0,211,214!小鳍片-13
pcirc,12.8,0,214,221!空隙-15
pcirc,12.8,0,221,224!小鳍片-14
pcirc,12.8,0,224,231!空隙-16
pcirc,12.8,0,231,234!小鳍片-15
pcirc,12.8,0,234,241!空隙-17
pcirc,12.8,0,241,244!小鳍片-16
pcirc,12.8,0,244,251!空隙-18
pcirc,12.8,0,251,254!小鳍片-17
pcirc,12.8,0,254,261!空隙-19
pcirc,12.8,0,261,264!小鳍片-18
pcirc,12.8,0,264,271!空隙-20
pcirc,12.8,0,271,274!小鳍片-19
pcirc,12.8,0,274,281!空隙-21
pcirc,12.8,0,281,284!小鳍片-20
pcirc,12.8,0,284,291!空隙-22
pcirc,12.8,0,291,294!小鳍片-21
pcirc,12.8,0,294,301!空隙-23
pcirc,12.8,0,301,304!小鳍片-22
pcirc,12.8,0,304,311!空隙-24
pcirc,12.8,0,311,319!大鳍片-4
aovlap,all
numcmp,all
adele,2
adele,5,9,2
adele,49,51,1
adele,12,24,2
adele,27,39,2
adele,42,48,2
pcirc,7.6,0,0,360
aadd,all
rectng,7.8,8.6,-8.5,8.5
aovlap,all
FLST,2,5,4  
FITEM,2,21  
FITEM,2,30  
FITEM,2,165
FITEM,2,166
FITEM,2,28  
AL,P51X
adele,4
aadd,all
numcmp,all
VOFFST,1,500, ,
wpoff,7.8   
wpro,,,-90.000000  
block,-22,22,-22,22,-22,22,
vovlap,all

结果就会出错，提示splot检查，“Use the SPLOT command to examine bad surfaces/areas ”俺输入检查了，不过结果也看不到哪些方格什么意思。

奇怪的是，我如果把“VOFFST,1,500, , ”500改成200，300，小一点的长度的话，前面那段程序就可以运行了，不知道为什么，哪里限制住了，请高手提示下，谢谢；

samlin

程序运行发现，只要VOFFST，1，438，这里的438是最大数， 如果输入439，后面的vovlap,all命令马上执行出错，实在不解啊，高手请指点一下；:@Q

16443

检查一下block创建的体是否与voffst，，500后的体满足vovlap的条件
block,-22,22,-22,22,-22,22,
vovlap,all

samlin

报告主任，我有尝试修改block体的大小尺寸:@Q :@Q ，不管是大还是小，都是一样不行，有别的办法吗

cam_1980

既然缩短了就可以，那问题肯定还是出在你这个长度上，可能太长了就超过了ansys所允许的某个参数的数值。因为ansys里面有很多具体的限制的，比如分析载荷步有最大默认步数限制，选择任何entity都有一个最大数量的限制，但是这个最大限制都是可以手动修改的，我怀疑你这个也是突破了ansys的某个限制，但是是什么限制我不知道。容差我已经试过了，好像不是这个问题。
迫切希望谁能给解答一下。

samlin

我也这样怀疑，可是改了很多参数，都没反映，真是不解，期待高手来解答