General Mechanical

General Mechanical

TANK SEISMIC

    • asder
      Subscriber

      NEED TO MAKE SUPERPOSITION TIME HISTORY SEISMIC ANALYSIS
      I MADE SOME CODES NONE OI IT WORKS :-

    • Rob
      Ansys Employee

      You need to model the effect on the fluid in the tank? Or are you looking at the effect on the concrete bit?

    • asder
      Subscriber

      dear sir, 


      i modeled the tank and i gain all modes of shape from modal analysis 


      my problem is time history superposition analysis 


      i found some codes for an example like 


      IF,transient,EQ,1,THEN
      /SOLU
      ANTYPE,TRANS
      TRNOPT,MSUP,10,DAMP
      TIMINT, ON, STRUCT
      *DIM,force,table,5001,1,1,TIME,,
      *TREAD,force,input4,txt,,
      DELTIM,1E-4,1E-6,1E-4,ON
      AUTOTS, OFF
      OUTRES,,1
      !TM_START=1E-4
      TM_START=0.0
      TM_END=0.5
      TM_INCR=1E-4
      i=0
      *DO,TM,TM_START,TM_END,TM_INCR
      i=i+1
      OUTRES,,1
      NSUBST,1
      TIME,TM
      value=force(TM)
      *STATUS,VALUE,1,,1,,1,,
      F,N_F,FZ,value,,,
      SOLVE
      *ENDDO
      FINISH
      does it right ? if i use acel,timehistorytable,0,9.8 does this load function is right ? i use it for superposition but i found the results is modes shapes only and frequency changed to time , this isn't right solution , why i get that solution 

    • asder
      Subscriber

      IF,transient,EQ,1,THEN


      /CONFIG,NRES,1000000000


      /SOLU


      ANTYPE,TRANS


      TRNOPT,full


      *DIM,ACC,TABLE,12002,1,1,TIME


      *TREAD,ACC,seismic-recorded,TXT


      OUTRES,ALL,ALL


      DMPRAT,0.005


      !TM_START=0.005


      TM_START=0.005


      TM_END=60


      TM_INCR=0.005


      i=0


      *DO,TM,TM_START,TM_END,TM_INCR


      TIME,TM


      ACEL,%ACC%,0,9.8


      SOLVE


      *ENDDO


      FINISH


       


      or this 

    • jj77
      Subscriber

      Stop copy pasting code without any explanations first thing.


       


      You said: my problem is time history superposition analysis, try running it with the full method (not mode super position).


       


      If you are still having troubles, explain in detail what the problem is, and attach images to show what you mean in your explanation so we can understand.


       


       

    • asder
      Subscriber

      i will next few days, thank you friend , do you work in 3D-BASIS-ME-MB software ?

Viewing 5 reply threads
  • You must be logged in to reply to this topic.