How does one do a coupled HF-thermal-structural modal
analysis? The customer knows how to scale the heat fluxes
based on the obtained H field.


If you do a google search on: ansys cavity accelerator
you will find many papers on this. Here are some of the links

<a target=_blank href="http://accelconf.web.cern.ch/AccelConf/p01/PAPERS/MPPH060.PDF">http://accelconf.web.cern.ch/AccelConf/p01/PAPERS/MPPH060.PDF</a>http://accelconf.web.cern.ch/AccelConf/p01/PAPERS/MPPH060.PDF
<a target=_blank href="http://www.lnf.infn.it/acceleratori/sparc/TECHNOTES/RF/SPARC_RF_05_001.pdf">http://www.lnf.infn.it/acceleratori/sparc/TECHNOTES/RF/SPARC_RF_05_001.pdf</a>http://www.lnf.infn.it/acceleratori/sparc/TECHNOTES/RF/SPARC_RF_05_001.pdf
<a target=_blank href="http://repositories.cdlib.org/cgi/viewcontent.cgi?article=4471&context=lbnl">http://repositories.cdlib.org/cgi/viewcontent.cgi?article=4471&context=lbnl</a>http://repositories.cdlib.org/cgi/viewcontent.cgi?article=4471&context=lbnl
<a target=_blank href="http://www.cap.bnl.gov/mumu/conf/MUTAC-040219/TALKS/Li.pdf">http://www.cap.bnl.gov/mumu/conf/MUTAC-040219/TALKS/Li.pdf</a>http://www.cap.bnl.gov/mumu/conf/MUTAC-040219/TALKS/Li.pdf
<a target=_blank href="http://srf.desy.de/fap/paper/TuP45.pdf">http://srf.desy.de/fap/paper/TuP45.pdf</a>http://srf.desy.de/fap/paper/TuP45.pdf
<a target=_blank href="http://hadron.kek.jp/~accelerator/TDA/TM/pdf_files/JKJ-ACC-TM-02-31.pdf">http://hadron.kek.jp/~accelerator/TDA/TM/pdf_files/JKJ-ACC-TM-02-31.pdf</a>http://hadron.kek.jp/~accelerator/TDA/TM/pdf_files/JKJ-ACC-TM-02-31.pdf
<a target=_blank href="http://www-eng.lbl.gov/~virostek/Inj/Documentation/Photoinj_status.ppt#273,5,Slide">http://www-eng.lbl.gov/~virostek/Inj/Documentation/Photoinj_status.ppt#273,5,Slide</a>http://www-eng.lbl.gov/~virostek/Inj/Documentation/Photoinj_status.ppt#273,5,Slide 5
<a target=_blank href="http://www.isis.rl.ac.uk/accelerator/mice/tr/05/05.01.doc">http://www.isis.rl.ac.uk/accelerator/mice/tr/05/05.01.doc</a>http://www.isis.rl.ac.uk/accelerator/mice/tr/05/05.01.doc

Here is a sample input.
!!! GEOMETRY
/prep7
cylind,RCU,,-LCU/2,LCU/2,,90
cylind,RVOID,,-LVOID/2,LVOID/2,,90
cylind,RVOID,RCU,-LCU/2,LCU/2,,90
vovlap,all
/vup,,z
/view,,-1,-2,1
vplot


!!! EMAG ELEM TYPES & PROPERTIES
emunit,mks

! Void
et,1,120
mp,murx,1,1
mp,perx,1,1 ! 2

! Copper (not solved in Emag portion)
et,2,120
mp,murx,2,1.0
mp,perx,2,1.0
mp,rsvx,2,RESCU

! Assign Attributes
asel,,loc,z,-LCU/2
asel,a,loc,z,LCU/2
vsla
cm,Vcopper,volu
vatt,2,2,2

vsel,inve
cm,Vvoid,volu
vatt,1,1,1
allsel
cmplot


!!! MESH
desize,,3,40,,6
vswe,all
/pnum,mat,1
/num,1
eplot

! Define components
vsel,,,,Vvoid,,,1
asel,r,ext
asel,u,loc,x,0
asel,u,loc,y,0
cm,Ainterf,area ! interface areas between void and copper

allsel
asel,,ext
asel,u,loc,x,0
asel,u,loc,y,0
cm,Aouter,area ! copper outer areas (except symmetry planes)

vsel,,,,Vvoid
asel,,loc,x,0
asel,a,loc,y,0
aslv,r
cm,Asymm,area ! symmetry plane areas

allsel
cmsel,all


!!! EMAG B.C's
da,Ainterf,ax,0 ! electric wall at interface
sfa,Ainterf,,shld,CONDCU,1.0 !with surface shielding properties

!!! EMAG EIGENSOLUTION
/solu
antype,modal
hfeigopt,cavity
modopt,lanb,1,2.9e9,4.5e9,,on ! normalize to unity
mxpand,,,,yes ! calculate element results
vsel,,,,Vvoid,,,1
outres,all,1
solve
fini


/prep7

et,2,90
mp,kxx,2,1
et,1,0
alls
fini

/solu
esel,s,type,,2
ldread,ehflux,1,1,,0,,rmg





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