Can you limit the expansion of modes to only those modes with a high participation factors by using

- October 4, 2017 at 12:20 pm
  
  Vishal Ganore
  Ansys Employee
  
  Yes, but you have to do the modal expansion is a separate solution pass as shown in the following input. /prep7 et,1,185,,2 mp,ex,1,1e7 mp,nuxy,1,.3 mp,dens,1,.0003 block,,20,,2,,1 esize,1 vmesh,1 nsel,s,loc,x,0 d,all,all nsel,all fini ! Obtain the Modal Solution /solu antype, MODAL modopt, LANB,12 ! Block Lanczos solve finish ! Perform the modal selection and expansion /solu antype, MODAL, RESTART mxpand,,,, yes,,, MODM! Mode selection is based on the modal effective mass, and element ! results are requested modseloption,no, no,0.90, no,no,no ! Only direction X is selected, a minimum of 90% of the total ! mass is requested in this direction solve finish

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