Ansys-Roxie Interface
Susana Izquierdo Bermudez
18/12/2013
Overview
Ansys2Roxie
Roxie2Ansys
ANSYS
displacements
ROXIE magnetic
forces
Apply displacement
in ROXIE strands
Apply forces in the nodes
defined in the ANSYS
mesh
Study impact of the
displacements on
field quality in ROXIE
Study impact of the
magnetic forces computed
by ROXIE in ANSYS
Susana Izquierdo Bermudez
2
Methodology
CERN TE-Note-2010-006 : A method to transfer concentrated Lorentz
forces to a finite element mechanical model.
Attilio Milanese / TE-MSC department. EDMS NO. 1092691
Concentrated Lorentz force f*
acting on strand (x*,y*) position
Force transferred to the surrounding nodes of
the element (Fx, Fy)
Shape function of the element,
evaluated where the force is applied
1. Find the natural coordinates (s*,t*) of the strand physical coordinates (x*,y*)
2. Compute the Shape Function in the position of the strand N*=N(s*,t*)
3. Compute the force in the nodes coordinates
Susana Izquierdo Bermudez
3
Available element types
Q4: four node bilinear quadrilateral element
T3: three-node linear triangular element
Q8: eight node quadrilateral element
T6: six-node quadratic triangular element
Attilio Milanese
EDMS
NO. 1092691
Susana Izquierdo
Bermudez
4
The GUI interface
•
•
•
•
ANSYS mesh scale. Defines if the ANSYS mesh coordinates are in m or
in mm. For the roxie2ansys interface, the forces are scaled with the
mesh, i.e., if the mesh is in mm, forces are in N/mm and if the mesh is in
m, forces are in N/m.
ANSYS coordinate system for nodal forces. Only relevant for
roxie2ansys interface. Indicate if the forces given by ROXIE are in
Cartesian coordinates (x-y) or in Polar coordinates (r-θ).
Lower and Upper angle of ANSYS mesh. Reflects the displacements
computed in ANSYS to the entire coil. This is only relevant for
ansys2roxie interface, in the cases where the ANSYS model does not
include the entire coil.
ANSYS coordinate system for nodal force offset. Only relevant for
roxie2ansys interface. Allows to give the force in a coordinate system with
a certain offset from the global coordinate system.
See examples in these slides to learn how to use these options…
Susana Izquierdo Bermudez
5
ansys2roxie: input
Input files (standard ANSYS files):
1. ELEMENT information of the mesh: ansys2rx.elem
I, J, K, L, M, N, O, P, MAT, TYPE, REAL,
SECNUM, ESYS, IEL, where MAT, TYPE,
REAL, and ESYS are attribute numbers,
SECNUM is the beam section number, and IEL
is the element number.
2. NODAL information of the mesh: ansys2rx.node
Node number, x-y location
3. Computed ANSYS displacements ansys2rx.disp
Node number, x-displacement, y-displacement, x-position, y-position
Susana Izquierdo Bermudez
To generate these files in ANSYS…
/PREP7
RSYS,0
cmsel,s,coil
alls,below,area
NWRITE,ansys2rx,node
Just a suggestion!
EWRITE,ansys2rx,elem
/POST1
RSYS,0
CSYS,0
DSYS,0
*GET,ncnt,NODE,0,COUNT
*DIM,ndata,ARRAY,ncnt,5
*DO,i,1,ncnt,1
*GET,curn,NODE,,NUM,MIN
*SET,ndata(i,1),curn
*GET,ndata(i,2),NODE,curn,LOC,X
*GET,ndata(i,3),NODE,curn,LOC,Y
*GET,ndata(i,4),NODE,curn,U,X
*GET,ndata(i,5),NODE,curn,U,Y
NSEL,U,NODE,,curn
*ENDDO
*CFOPEN,ansys2rx,disp
*VWRITE,ndata(1,1),ndata(1,4),ndata(1,5),ndata(1,2),ndata(1,3)
(F10.0,TL1,' ',' ',E13.6,' ',E13.6,' ',E13.6,' ',E13.6)
*CFCLOS
*UILIST,ansys2rx.disp
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ansys2roxie: interface + output
GUI interface:
Output: Impact of coil deformation in field quality
No coil
deformation
b6 (units)
b10 (units)
0.26
0.22
Deformation due to
preload + cool down +
Lorentz
1.01
0.2
Δ
0.75
-0.02
ansys2rx.displnode
Susana Izquierdo Bermudez
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roxie2ansys: input
Input files (standard ANSYS files):
1. ELEMENT information of the mesh: ansys2rx.elem
I, J, K, L, M, N, O, P, MAT, TYPE, REAL,
SECNUM, ESYS, IEL, where MAT, TYPE,
REAL, and ESYS are attribute numbers,
SECNUM is the beam section number, and IEL
is the element number.
2. NODAL information of the mesh: ansys2rx.node
Node number, x-y location
Susana Izquierdo Bermudez
To generate these files in Ansys:
/PREP7
cmsel,s,coil
alls,below,area
EWRITE,anysys2rx,elem
NWRITE,anysys2rx,node
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roxie2ansys: interface + output
case 1 in 1
GUI interface:
Output: Nodal Lorentz force to be applied ANSYS model
rx2ansys.inp
Fy
Fx
(force in N/m (mesh is in m))
This can be easily read in ANSYS…
/solu
/input,rx2ansys,inp
Susana Izquierdo Bermudez
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roxie2ansys: interface + output
case 2 in 1
Fθ
Fr
Force in N/mm (scale with ANSYS mesh scale)
Susana Izquierdo Bermudez
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roxie2ansys: interface + output
case 2 in 1
Fy
Fx
Force in N/mm (scale with ANSYS mesh scale)
Susana Izquierdo Bermudez
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Input files available in ROXIE website:
https://espace.cern.ch/roxie/Lists/Usecases/AllItems.aspx
Thanks to A. Milanese, B. Auchmann, D. Tsirigkas
Ansys2roxie displacements
dx={N*} DX
dy={N*} DY
1. Finds out if the strand is included in the element
http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.htm
1. Computes the shape function at the position of the strand
2. Compute the displacement on the strand coordinates
Susana Izquierdo Bermudez
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