How to obtain the natural frequency of the beam in ANSYS
How to obtain the natural frequency of the beam in ANSYS
(OP)
Dear gentlemen,
I am new in ansys, and I need a help. I want to obtain the frequencies of the beam, for any properties of the beam and any boundary conditions. I need some example how to set parameters of the beam, number of finite elements. Of course, for the beginning I need analyze for free vibration of the beam. We can include rotary inertia and shear. But for the beginning. ANSYS, frequency, settings parameters and boundary conditions.
Regards!!!
Georg
I am new in ansys, and I need a help. I want to obtain the frequencies of the beam, for any properties of the beam and any boundary conditions. I need some example how to set parameters of the beam, number of finite elements. Of course, for the beginning I need analyze for free vibration of the beam. We can include rotary inertia and shear. But for the beginning. ANSYS, frequency, settings parameters and boundary conditions.
Regards!!!
Georg





RE: How to obtain the natural frequency of the beam in ANSYS
Of course, you could use beam elements as well, but I'd imagine that your model won't be very large either way.
Good luck.
//signed//
Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio
--
http://engineeringliberty.wordpress.com
RE: How to obtain the natural frequency of the beam in ANSYS
http://w
Check out page 97 (107 in the PDF)
//signed//
Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio
--
http://engineeringliberty.wordpress.com
RE: How to obtain the natural frequency of the beam in ANSYS
CODE
/cle,nostar
/title,Modal Analysis of a Simply Supported Beam
/filnam,beam_modal
/prep7
! ============== PARAMETERS ==================
YOUNGS_MOD = 210e9
SHEAR_MOD = 210e9/2.6
POISSON = 0.3
DENSITY = 2400
ELEMENT_SIZE = 5/100
KP_COORDX1 = 0.
KP_COORDX2 = 5.0
! ============================================
mp,dens,1,DENSITY
mp,ex,1,YOUNGS_MOD
mp,nuxy,1,POISSON
mp,gxy,1,SHEAR_MOD
k,1,KP_COORDX1,0.,0.
k,2,KP_COORDX2,0.,0.
l,1,2
et,1,4
r,1,0.5,4.17E-2,10.42E-3,0.25,0.25,,
RMORE, , ,0.83, , , ,
lesiz,all,ELEMENT_SIZE
latt,1,1,1
lmesh,all
alls
/solu
DK,1,,0.,,0,UX,UY,UZ ,rotx ,roty , ,
DK,2,,0,,0,UY,UZ ,rotx ,roty , , ,
alls
d,all,uz,0.
d,all,rotx,0.
d,all,roty,0.
ANTYPE,2
MSAVE,0
MODOPT,LANB,5
EQSLV,SPAR
MXPAND,5, , ,1
LUMPM,0
PSTRES,0
MODOPT,LANB,5,0,0, ,OFF
alls
solv
save
fini
/post1
------------
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RE: How to obtain the natural frequency of the beam in ANSYS
Thank you very much for this code. But where can I type this code and I wanted to change something (dimension of the beam) and obtain then the eigenvalues problem? How. If you have some .pdf manual for example, very simple.
Thank you in advance!!!
RE: How to obtain the natural frequency of the beam in ANSYS
------------
See FAQ569-1083: Asking questions the smart way on Eng-Tips fora for details on how to make best use of Eng-Tips.com
RE: How to obtain the natural frequency of the beam in ANSYS
It is clear, but where I can set the boundary conditions, dimensions of the beam in your file? Also I would like to get the natural frequencies for free vibrations.