Learning Forum

[dhruvdeshwal17]

Greetings

This is an error I am facing while doing analysis.

The analysis - A copper plate and a magnet are placed adjacent to each other with a certain gap. A velocity is given to the plate (-0.1m/s) and the magnet remains stationary. So, as the plate move, the plate will see a change in a magnetic field by which eddy current will be generated in the plate and due to this current a magnetic field will be generated of opposite polarity as that of the magnet. Due to this generated magnetic field, the magnet experiences a force. I FMAGBC the copper plate and parallel flux as a boundary condition.

My aim is to calculate the eddy current, Lorentz force associated with this analysis, but I am not able to solve it.

Please provide any suggestion regarding loading, model, or anything you like to suggests

I am providing Marcos of my problem for a better understanding of the analysis.

/PREP7  

!*  

ET,1,SOLID97

!*  

KEYOPT,1,1,1

KEYOPT,1,2,1

KEYOPT,1,5,1

!*  

KEYOPT,1,1,1

!*  

!Real Constants

R,1,

RMORE, , , , ,-0.1, ,  

RMORE, , , , , ,

!*  

!*  

R,2,

RMORE, , , , , , ,  

RMORE, , , , , ,

!*  

!*

! Material Properties  

MPTEMP,,,,,,,,  

MPTEMP,1,0  

MPDATA,MURX,1,,1.2289  ! Permeability of magnet

MPTEMP,,,,,,,,  

MPTEMP,1,0  

MPDATA,MGXX,1,, 

MPDATA,MGYY,1,, 

MPDATA,MGZZ,1,,9.26e5  !coercive force of magnet  

MPTEMP,,,,,,,,  

MPTEMP,1,0  

MPDATA,MURX,2,,0.999  ! Permeability of copper plate

MPTEMP,,,,,,,,  

MPTEMP,1,0  

MPDATA,RSVX,2,,1.72e-8 ! Resistivity of copper plate 

MPTEMP,,,,,,,,  

MPTEMP,1,0  

MPDATA,MURX,3,,1  ! Permeability of air

! Modelling

BLOCK,-0.013,0.013,-0.013,0.013,-0.0025,0.0025, ! copper plate

CYLIND,0.013, ,0.0055,0.0355,0,360,  ! magnet

BLOCK,-0.05,0.05,-0.05,0.05,-0.05,0.05, ! enclosed area

FLST,2,3,6,ORDE,2  

FITEM,2,1  

FITEM,2,-3  

VOVLAP,P51X 

FLST,2,3,6,ORDE,3  

FITEM,2,1  

FITEM,2,-2  

FITEM,2,4  

VGLUE,P51X  

/VIEW,1,1,1,1  

/ANG,1  

/REP,FAST  

NUMCMP,VOLU

! Meshing 

TYPE,  1  

MAT,    1

REAL,    2  

ESYS,    0  

SECNUM, 

!*  

MSHAPE,1,3D 

MSHKEY,0

!*  

CM,_Y,VOLU  

VSEL, , , ,    2 

CM,_Y1,VOLU 

CHKMSH,'VOLU'  

CMSEL,S,_Y  

!*  

VMESH,_Y1  

!*  

CMDELE,_Y  

CMDELE,_Y1  

CMDELE,_Y2  

!*  

TYPE,  1  

MAT,    2

REAL,    1  

ESYS,    0  

SECNUM, 

!*  

CM,_Y,VOLU  

VSEL, , , ,    1 

CM,_Y1,VOLU 

CHKMSH,'VOLU'  

CMSEL,S,_Y  

!*  

VMESH,_Y1  

!*  

CMDELE,_Y  

CMDELE,_Y1  

CMDELE,_Y2  

!*  

TYPE,  1  

MAT,    3

REAL,    2  

ESYS,    0  

SECNUM, 

!*  

CM,_Y,VOLU  

VSEL, , , ,    3 

CM,_Y1,VOLU 

CHKMSH,'VOLU'  

CMSEL,S,_Y  

!*  

VMESH,_Y1  

!*  

CMDELE,_Y  

CMDELE,_Y1  

CMDELE,_Y2  

!*  

ALLSEL,ALL

! Force Flag

  

VSEL,S, , ,    1 

ESLV,S  

CM,A,ELEM  

ALLSEL,ALL  

!*  

!*  

FMAGBC,'A' 

! Boundary Condition

 

FLST,2,6,5,ORDE,2  

FITEM,2,11  

FITEM,2,-16 

DA,P51X,ASYM

FINISH  

/SOL

! Tranisent Velocity

!*  

ANTYPE,4

!*  

TRNOPT,FULL 

!*  

DELTIM,0.002,0,0

OUTRES,ERASE

OUTRES,ALL,ALL  

AUTOTS,1

TIME,0.01  

/STATUS,SOLU

SOLVE  

Thank You!

[Navya C]

nWhich Ansys tool are you using for this simulation?.RegardsnNavya?n

[dhruvdeshwal17]

HellonANSYS APDL 16.0 (Academic Research)nRegardsn

[Erik Kostson]

This element is no longer supported - use current elements like solid226.nSee example for more info:nhelp/ans_lof/lof2Dstatmaganalexamples.html#d0e5425nIn low-freq. emag chapter:nn2.5.3. Example: 2-D Static Magnetic Analysis with Velocity EffectsnnHope this helpsnnEriknn

[dhruvdeshwal17]

Thank You!n