分级施加荷载

wlwwk1997

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

不知什么是分级载荷，是不是载荷步，或者是载荷工况？

wlwwk1997

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

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

ls, 英语强人！     
ls, 英语强人！     
ls, 英语强人！