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Pre-stress modal analysis in ABAQUS for circular cylindrical shell
Tue, 2013-10-08 06:03 - anishiitk
Dear all,
I am trying to perform a pre-stress modal analysis of a cylindrical shell in ABAQUS, and I am unable to transfer data from step-1 to step-2. Due to this
results are the same as the modal analysis of the beam without the
static force.
Anybody know the solution of this kind of problem, kindely let me know..
email id: anish@iitk.ac.in
Thanking you in advance
Anish Kumar
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One example
Here are two examples:
beam without prestress:
/PREP7
K,1,0,0
K,2,1.01,0
L,1,2
ET,1,BEAM23,,1,,,,2
R,1,0.012
MP,EX,1,178000
MP,NUXY,1,0.3
MP,DENS,1,1000
ESIZE,0.1
LMESH,ALL
/SOLU
/SOLU
ANTYPE,MODAL ! Select modal analysis type
MODOPT,LANB,5 ! Select the Block Lanczos mode-extraction method,
! extracting 5 modes
D,1,ALL
D,2,ALL
SOLVE
Beam with prestress:
/PREP7
K,1,0,0
K,2,1,0
L,1,2
ET,1,BEAM23,,1,,,,2
R,1,0.012
MP,EX,1,178000
MP,NUXY,1,0.3
MP,DENS,1,1000
ESIZE,0.1
LMESH,ALL
/SOLU
ANTYPE,STATIC ! Select modal analysis type
PSTRES,ON
!nlgeom,on
! extracting 5 modes
D,1,ALL
D,2,UX,0.001
!D,2,UX,0
D,2,UY,0
D,2,ROTZ,0
SOLVE
FINISH
/SOLU
ANTYPE,MODAL ! Select modal analysis type
PSTRES,ON
MODOPT,LANB,10 ! Select the Block Lanczos mode-extraction method,
MXPAND,10,,,0
Solve