General Mechanical

General Mechanical

Campbell diagram problem

    • mohammedlaminemekhalfia
      Subscriber

      Dear

      I hope this post will find all users well,

      as a followup for my problem considering the plot for campbell diagram for a Bladed disk (60 blades).

      I was wondering if there is a possibility to make ansys draw the campbell diagram for more tham 180 modes?

      I tried that but I had the following error:

      "Campbell Diagram data is not complete. Please refer to ANSYS output file for possible causes." The following information is what I deduced after outputting the file from the solution branch (Write input file) and looking through the error file which says "there's no data related to the campbell diagram."

      I tried previous suggested solution about creating a new database but that did not work.

      Attached a Picture for the Geometry

    • Aniket
      Ansys Employee

      Can you also include the error messages in the solver output file? 

      -Aniket

      How to access Ansys help links

      Guidelines for Posting on Ansys Learning Forum

      • mohammedlaminemekhalfia
        Subscriber

        This message I got when I reduced the number of modes from 180 to 121 but for the first case it was mentionned a lake of files ( corrupted database ) for the  memory I am sure that I have sufficent alloacated memory (RAM) and storage capacity of hard disk.

         

        PRINT CAMPBELL DIAGRAM
            Sorting : ON
            X axis unit : rd/s
            Driving component : CM_ROTVELCITY53                
            Printout all frequencies

         *** FATAL ***                           CP =   14177.062   TIME= 16:52:51
         This model requires more scratch space than available.  The program has
         currently allocated 39439 MB and was not able to allocate enough       
         additional memory in order to proceed.  Please increase the virtual    
         memory on your system and/or increase the work space memory and rerun  
         the program.  Problem terminated.                                      

         ALL CURRENT ANSYS DATA WRITTEN TO FILE NAME= ansabort.db
          FOR POSSIBLE RESUME FROM THIS POINT

         ************************************************************************
         The above error is non-recoverable by ANSYS                            
          ANSYS run terminated by the indicated error                           
          Current data base saved if possible.   

         

         

         

      • mohammedlaminemekhalfia
        Subscriber

        This is the message when I try with 180 modes

        -----------------------------------

        fAnsMemAllocL with negative length=         -1060200976
          This is probably due to an integer overflow in
           the calculation of the block size.
          The data type is=   3 and the block name=

    • mohammedlaminemekhalfia
      Subscriber

      This message I got when I reduced the number of modes from 180 to 121 but for the first case it was mentionned a lake of files ( corrupted database ) for the  memory I am sure that I have sufficent alloacated memory (RAM) and storage capacity of hard disk.

       

      PRINT CAMPBELL DIAGRAM
          Sorting : ON
          X axis unit : rd/s
          Driving component : CM_ROTVELCITY53                
          Printout all frequencies

       *** FATAL ***                           CP =   14177.062   TIME= 16:52:51
       This model requires more scratch space than available.  The program has
       currently allocated 39439 MB and was not able to allocate enough       
       additional memory in order to proceed.  Please increase the virtual    
       memory on your system and/or increase the work space memory and rerun  
       the program.  Problem terminated.                                      

       ALL CURRENT ANSYS DATA WRITTEN TO FILE NAME= ansabort.db
        FOR POSSIBLE RESUME FROM THIS POINT

       ************************************************************************
       The above error is non-recoverable by ANSYS                            
        ANSYS run terminated by the indicated error                           
        Current data base saved if possible.   

       

       

       

    • Aniket
      Ansys Employee

      This basically means you do not have enough RAM to solve the problem, you may want to try it with a machine with higher RAM.

      -Aniket

      How to access Ansys help links

      Guidelines for Posting on Ansys Learning Forum

      • mohammedlaminemekhalfia
        Subscriber

        I use this machine  : HP 470 G7 17,3 i7-10510U/16GB/1TB SSD/R530-2GB/DVD/W10P.

        I performed yestreday another simulation: to have the following error

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