## General Mechanical

#### Apply force (as tabular) using APDL Command SFE

• DESOJIB
Subscriber

Hi all,

I am trying to apply Force on a surface in Harmonic Response Simulation. Force is in Tabular form having Real and Imaginary component in x,y,z direction and diffrent frequency. shown as below.

can any body help how can i apply this force on a surface using SFE command. I have converted 3D elements on Surface in 2D 156 Elements. here is my APDL script

/PREP7

et,101,154

cmsel,s,face

type,101

ESURF

allsel,all

/com,*********** Define Force Using Surface Effect Elements ***********

local,12,0,0.,0.,0.,0.,0.,0.

csys,0

et,101,154

esel,s,type,,101

keyop,101,7,1                ! Use original area so load is constant in large deformation

keyop,101,11,2              ! Use real and not project area

esel,all

/com,****************************************************

/com,******************* SOLVE FOR LS 1 ****************

*DIM,x,TABLE,2,1,1,FREQ,

! Frequency values

x(1,0,1) = 0.

x(2,0,1) = 200.

x(1,1,1) = 0.

x(2,1,1) = 10.

*DIM,xi,TABLE,2,1,1,FREQ,

! Frequency values

xi(1,0,1) = 0.

xi(2,0,1) = 200

xi(1,1,1) = 0.

xi(2,1,1) = 0.507098511632205

esel,s,type,,101

nsle

/SOLU

sfe,all,,pres,1,%x%,

sfe,all,,pres,2,%xi%

/NERR,999999

There i am getting error :

*** ERROR ***                           CP =       0.938   TIME= 14:56:00

There are no degrees of freedom active.

*** ERROR ***                           CP =       1.094   TIME= 14:56:00
There are no degrees of freedom active.

*** ERROR ***                           CP =       1.094   TIME= 14:56:00
There are no degrees of freedom active.

*** ERROR ***                           CP =       1.094   TIME= 14:56:00
There are no degrees of freedom active.

*** ERROR ***                           CP =       1.094   TIME= 14:56:00
There are no degrees of freedom active.

*** ERROR ***                           CP =       1.094   TIME= 14:56:00
There are no degrees of freedom active.

Regards,

Bhavin