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发表于 2009-6-8 15:06:20
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来自 北京
本帖最后由 hy1966 于 2009-6-8 16:47 编辑
谐响应分析代码
Modal analyses are used to calculate the response of a mechanicalsystems subjected to a cyclic excitation. We will apply an AC voltageof 10V to calculate the forced harmonic response of the beam devicearound its resonance frequency.
/SOLU ! Enter solution processor
ANTYP,HARM ! Harmonic analysis type
HARFRQ,0.310E+06,0.314E+06 ! Frequency range for analysis
NSUBST,10 ! Number of steps to calculate
KBC,1 ! Step loads (no ramp)
D,top_elec,VOLT,0.0 ! Assign zero potential to a node of top electrode
D,bot_elec,VOLT,10.0 ! Assign cyclic potential of 10 V to top electrode
NSEL,S,LOC,X,0 ! Select nodes at beam attachment point
D,ALL,UX,,,,,UY,UZ ! Remove displacement DOFs from selected nodes
NSEL,S,LOC,Y,0 ! Select nodes at beam centre line
DSYM,SYMM,Y ! Define symmetry boundary conditions
NSEL,ALL ! Select all nodes
SOLVE ! Solve current load step
FINISH ! Exit active processorReviewing results of harmonic analysisUse the input listing below to review the harmonic response of the piezo beam.
/POST26 ! Enter time-history post-processor
NSEL,S,LOC,Y,0 ! Select nodes with coordinates Y=0N
SEL,R,LOC,Z,0 ! Reselect coordinates with Z=0N
SEL,R,LOC,X,lbeam ! Reselect coordinates with X=lbeam
*GET,ntip,NODE,,N, UM,MIN ! Get number of node at beam tip (selected node)
NSOL,2,ntip,U,Z,tip_uz ! Store node ntip vert. displ. in variable tip_uz
NSEL,ALL ! Select all nodes
WPCSYS ! Align work-plane with global coordinate system
PRVAR,2 ! List data for tip_uz variable
PLVAR,2 ! Plot displacements as a function of frequency
FINISH ! Exit active processor |
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