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  1. SKJoe

    how to describe load step after using D command in transient analysis?

    ...as you desire. In "node(x,y,z)" replace x,y,z with global coordinates of node for which is displacement value being applied. freq = 2.7414 *dim, values,,1560,2 fini /sol antype,4 *do,i,1,1560 time , values(i,1) nsubst, freq/20,freq/200,freq/20 d,node(x,y,z),,values(i,2),,,,ux...
  2. SKJoe

    How to get RMODIF to work in a Macro during a transient analysis

    Hi, material properties you can change via MPCHG command (see ansys manual), real constants you can not, but what about to use some trick with EKILL/EALIVE commands - you can define two elements in coincident location with diferent real constants. On the beginning of analyses first element is...
  3. SKJoe

    How to apply a sinusoidal A.C current of 1 Amp using Function Editor

    Hi, i have not performed any electrical problem so far, but i think you can use do-loop as well : /sol inc = time/n *do,i,1,time,inc y=A*sin(wi+teta) ...apply y solve *enddo Regards, lubo
  4. SKJoe

    animation over previously captured pictures

    Hi Alex ! yes, this fully solved my problem, thank you ! lubo
  5. SKJoe

    animation over previously captured pictures

    ...some time ago. Now i am thinking to create an animation over these pictures. With ansys help i created a following code : /SEG,DELE /SEG,MULTI *DO,T,1,288 /TXTRE,FILE,88,'JOB_%T%','PNG',,2 /LSYM, -1.0, -1.0,, 88,, 1 /REP *ENDDO /SEG,OFF ANIM,288,1,0.3 in the code i set delay between...
  6. SKJoe

    temporary stop APDL flow

    Hi Alex ! Yes, i made a mistake - only 7 files. I think that this parsav/parres commands will fully solve my problem ! Thank you ! Regards, lubo
  7. SKJoe

    temporary stop APDL flow

    Hi, cbrn, i have core2duo. i know that. I was just wondered if there is some command or some way. Yes, this is only the way. i wanted to draw something in autocad meanwhile...i will see if it is possible - whether the slowdown is noticeable or not. Thank you. Regards, lubo
  8. SKJoe

    temporary stop APDL flow

    Hi, my code for entire model looks like this : *do,i,1,7 *do,j,1,4 fini /prep7 ...create finite model *do,k,1,3 *do,l,1,2 fini /sol ...... fini /post26 ...... *enddo *enddo fini /prep7 edele, all...
  9. SKJoe

    temporary stop APDL flow

    Hi, i would like to perform a parametric study with four parameters. In my case it means 7*4*3*2=168 runs. I presume that all of this will take some days. But still i need to use my PC for another work. Is there any way to temporary stop APDL analysis for day time and launch it for night time ...
  10. SKJoe

    Logarithmic Decrement

    Hi, ok, when i wrote that i am a new one i didnt mean that i dont have any theoretical basics. Before i wrote this thread i have recalled the basics. So i know the formula for logarithmic decrement. As i wrote previously the problem is that when the engine has left the bridge (the time response...
  11. SKJoe

    Logarithmic Decrement

    Hi, Thank you for your exhausting answer. I have a measurement but, i am afraid that i am not able to get logarithmic decrement from it. The bridge is relatively short (24m only, an engine has 11.5m from the first axle to the last). The weight of the engine is relatively small compare to weight...
  12. SKJoe

    Logarithmic Decrement

    Hi, i need to perform transient dynamic analysis of railway bridge and results compare with measurement. But in this field i am a new one. I have already studied some stuff in ansys help. I want to include some damping via alpha and beta coefficients of Rayleigh Damping formulation. To compute...
  13. SKJoe

    copy of entire model

    Thank you.
  14. SKJoe

    copy of entire model

    Hi ! Thank you for your quick reply - it fully solved my problem. About your rotated nodal coordinate system macro i am always pleased to learn something new... If you write me some "key commands" to create this macro may be i will be able to create it even by myself. Regards, lubo
  15. SKJoe

    copy of entire model

    ...I tried the following way, but it doesnt work : /prep7 ! creating model ... NUMMRG, ALL NUMCMP, ALL NWRITE,'nodes','txt' EWRITE,'elems','txt' *GET,ne,ELEM,,NUM,MAX NUMOFF, ELEM, ne *GET,nn,node,,NUM,MAX NUMOFF, node, nn LOCAL,11,0,25,-2,0,180, , ,1,1 ! created new position of copy...
  16. SKJoe

    *DO loop index same as outer index AQ...?

    Hi, the problem was that I wrote two slightly different do-loops as follows : *do,aq,1,5 ... *enddo *do,aq,1,5 *do,bq,1,3 ... *enddo *enddo in the first do-loop I forgot to write *enddo so this loop was executed only one time not five times. After I added *enddo the problem was...
  17. SKJoe

    *DO loop index same as outer index AQ...?

    Hi, I am doing a parametric study via *do-loops. In process of saving results to arrays obtaining following error message : *DO loop index same as outer index AQ. It is related with *DO,AQ,1,3... The first crazy thing is that in code written above I use similar Do-loop construction and it...
  18. SKJoe

    nonlinear buckling analyse

    Hi, Thank you for your reply cbrn ! I hoped that the answer will be as you wrote. I set these values for solution (the end of the previous load step is time = 6): NCNV , 2 LNSRCH, 1 TIME , 46 AUTOTS, ON NSUBST, 160,2000,160 NEQIT , 40 solution started with (46-6)/160 = 0.25 time increment...
  19. SKJoe

    nonlinear buckling analyse

    Hi, I do a set of nonlinear buckling analyses via APDL. I use shell181 and mpc 184. In some analyses the reason for termination was unconverged solution : R E S T A R T I N F O R M A T I O N REASON FOR TERMINATION. . . . . . . . . .UNCONVERGED SOLUTION but for another ones : R E...
  20. SKJoe

    Select nodes on a plane which is part of another plane

    Hi vidiii, If you look on selection syntax, two values must be imput min and max. So when I want to select some nodes in some location on line I do that this way : nsel,s,loc,x, L1-q, L1+q, where q is a very small value. Since my one very terrible experience I have not been using (...I hope...

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