wlwwk1997 发表于 2007-11-28 10:06

分级施加荷载

请问如何实现分级施加荷载并得到位移随荷载变化曲线？具体步骤？ 谢谢各位高人指点。

[ 本帖最后由 xuruikl 于 2007-11-28 20:25 编辑 ]

koalabear 发表于 2007-11-28 16:24

不知什么是分级载荷，是不是载荷步，或者是载荷工况？

wlwwk1997 发表于 2007-11-30 00:29

回复 #2 koalabear 的帖子

呵呵,就是象这样的:在有限元模型上同一位置依次加载0.5MPa-1.0MPa-1.5MPa-2.0MPa,最后想在同一个图上得到四条位移-载荷曲线图,问能否实现?

[ 本帖最后由 xuruikl 于 2007-11-30 08:52 编辑 ]

yagn 发表于 2008-6-16 15:27

可以实现
By default, if you repeat a force at the same degree of freedom, the new specification replaces the previous one. You can change this default to add (for accumulation) or ignore by using one of the following: Command(s):FCUM
GUI:Main Menu> Preprocessor> Loads> Define Loads> Settings> Replace vs Add> Forces
Main Menu> Solution> Define Loads> Settings> Replace vs. Add> Forces


For example:

F,447,FY,3000    ! Applies FY = 3000 at node 447
F,447,FY,2500    ! Changes FY value to 2500 (replacement)
FCUM,ADD         ! Subsequent F's to be added
F,447,FY,-1000   ! FY = 2500-1000 = 1500 at node 447
FCUM,IGNORE      ! Subsequent F's to be ignored
F,25,FZ,350      ! This force is ignored!
FCUM             ! Resets FCUM to default (replacement)See the Commands Reference for a discussion of the F and FCUM commands.

Any force set via FCUM stays set until another FCUM is issued. To reset the default setting (replacement), simply issue FCUM without any arguments.

sangjq 发表于 2008-6-16 22:15

ls, 英语强人！   
ls, 英语强人！   
ls, 英语强人！
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