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OCTOBER 19-20, 2012 - YMCA University of Science & Technology

OCTOBER 19-20, 2012 - YMCA University of Science & Technology

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Proceedings <strong>of</strong> the National Conference on<br />

Trends and Advances in Mechanical Engineering,<br />

<strong>YMCA</strong> <strong>University</strong> <strong>of</strong> <strong>Science</strong> & <strong>Technology</strong>, Faridabad, Haryana, Oct <strong>19</strong>-<strong>20</strong>, <strong>20</strong>12<br />

hropt, msup<br />

harfrq,(frq1-3),(frq1+3)<br />

hrout,<strong>of</strong>f,on<br />

nsubst,500<br />

zeeta=1/(4*sqrt(frq1))<br />

dmprat,(4.13*zeeta)<br />

lvscale,1<br />

kbc,1<br />

solve<br />

/solu<br />

expass,on<br />

expsol,,,frq1,yes<br />

hrexp,all<br />

solve<br />

fini<br />

!**********************************************<br />

/POST1<br />

SET,1,LAST,1,1<br />

!<br />

! Get the displacement at the lead end<br />

!<br />

NSEL,S,LOC,Z,caplen<br />

nsort,u,y<br />

*GET,MAXDISP,SORT,0,MAX<br />

!<br />

NSEL,S,LOC,z,-leadlen<br />

NSORT,S,z<br />

*GET,bendstrs,SORT,0,MAX<br />

!***FATIGUE LIFE CALCULATION***<br />

!N1S1**b=N2S2**b S-N Curve equation<br />

!N1=Actual number <strong>of</strong> fatigue cycles to fail<br />

!s1=bending stress <strong>of</strong> beam<br />

!FOR COPPER<br />

!N2=10**3<br />

!s2=310.26N/mm2<br />

!b=6.4 fatigue exponent for copper<br />

N1 = (8.8521e18)/(bendstrs**6.4)<br />

!Life=LIFE OF BEAM<br />

Life = N1/ (FRQ1*60)<br />

FINISH<br />

*************************************************<br />

### PROBABILISTIC DESIGN ANALYSIS###<br />

*************************************************<br />

/PDS<br />

! INPUT RANDOM VARIABLES<br />

PDANL,capacitor.mac !Probabilistic design analysis type<br />

PDVAR,caprad,GAUS,6.25,2.5 !Probabilistic design variables<br />

PDVAR,caplen,GAUS,21,2.6<br />

PDVAR,leadrad,GAUS,0.3,0.1<br />

PDVAR,leadlen,GAUS,1.2,0.4<br />

PDVAR,capm,GAUS,3.24,.50<br />

! OUTPUT RANDOM VARIABLES<br />

PDVAR,FRQ1,RESP<br />

PDVAR,LIFE,RESP<br />

PDMETH,MCS,LHS !Probabilistic design method, Monte Carlo Simulation<br />

PDLHS,30,1<br />

PDEXE,CAPACITOR,SER !Execute the probabilistic design<br />

####FINISH###<br />

333

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