General Mechanical

General Mechanical

Unexpected error in Random Vibration using Modal analysis.

    • ayush_3
      Subscriber

      I performed random vibration analysis after modal analysis, but Ansys shows me this error; I have no idea what caused this error. I have also checked that in the control settings of Modal, it is already 'Programmed controlled' for storing modal results. Any help??

    • peteroznewman
      Subscriber
      Open the Static Structural model that the Modal is linked to and set the Future Analysis setting as shown below. Solve the Static Structural model, then Solve the Modal analysis then solve the Random Vibration analysis.


    • ayush_3
      Subscriber
      I am only performing the modal analysis (to get the natural frequency of my model) for the random vibration; see image below.

    • ayush_3
      Subscriber
      Is it important to solve the static structural analysis first before modal? I don't have any pre-stresses. Hence I didn't solve static structural; please help as my project is at halt, and I'm new to Ansys.
    • ayush_3
      Subscriber
      I have attached the settings my modal analysis has. What should I tweak to get my job done?

    • peteroznewman
      Subscriber
      Please read my previous post and do what I said, but also Solve the Static Structural, even if you have to put some insignificant load on it. Then solve the Modal. Does that make a difference?
    • ayush_3
      Subscriber
      I am getting this error now:
      *****ANSYS SOLUTION ROUTINE*****


      PERFORM A STATIC ANALYSIS
      RESTART WILL BE PERFORMED FOR THE ANALYSIS OF LINEAR PERTURBATION

      *** ERROR ***CP =0.406TIME= 09:28:34
      During the multiframe restart process, neither the .RDB file nor the
      .Rnnn files were found.Both files are required to perform the
      multiframe restart for the linear perturbation analysis.You must use
      the RESCONTROL,LINEAR command in the prior base analysis.The
      ANTYPE,,RESTART command is ignored.
    • peteroznewman
      Subscriber
      In Static Structural, right click on the Solution branch and Clear Generated Data. You don't want to Restart. Then click Solve.
    • ayush_3
      Subscriber
      Please help me with this error, I don't understand this error


      *GET_WALLSTRTFROMACTIITEM=TIME WALLVALUE=12.0436111
      *********** Resuming The ANSYS db File from Modal Solution ***********

      RESUME ANSYS DATA FROM FILE NAME=C:\Users\AYUSH JAISWAL\AppData\Local\Temp\WB_AYUSH JAISWAL_4816_2\wbnew_files\dp0\SYS\MECH\file.db

      *** ERROR ***CP =0.922TIME= 12:02:37
      Data file C:\Users\AYUSH JAISWAL\AppData\Local\Temp\WB_AYUSH
      JAISWAL_4816_2\wbnew_files\dp0\SYS\MECH\file.db does not exist for
      RESUME.

      NUMBER OF WARNING MESSAGES ENCOUNTERED=0
      NUMBER OF ERRORMESSAGES ENCOUNTERED=1

      ERROR: Worker process(es) with rank(s) 3, 5 have encountered a FATAL error.
      The information below was gathered from the file*.out output file(s).
      Please review the worker process output file(s) listed below for more
      details on this error.


      Worker Process Output File .\file3.out:

      *** FATAL ***CP =1.328TIME= 12:02:37
      MPI error code = 2036473904 which translates to:
      Other MPI error, error stack:
      PMPI_Bcast(2667)....................: MPI_Bcast(buf=000000DDE8DF9820,
      count=2, MPI_INT, root=0, MPI_COMM_WORLD) failed
      MPIR_Bcast_impl(1804)...............: fail failed
      MPIR_Bcast(1832)....................: fail failed
      I_MPIR_Bcast_intra(2056)............: Failure during collective
      I_MPIR_Bcast_intra(2043)............: fail failed
      MPIR_Bcast_advanced(2135)...........: fail failed
      MPIR_Bcast_intra(1599)..............: fail failed

      Worker Process Output File .\file5.out:

      *** FATAL ***CP =1.125TIME= 12:02:37
      MPI error code = 2036473904 which translates to:
      Other MPI error, error stack:
      PMPI_Bcast(2667)....................: MPI_Bcast(buf=000000B3295F9A50,
      count=2, MPI_INT, root=0, MPI_COMM_WORLD) failed
      MPIR_Bcast_impl(1804)...............: fail failed
      MPIR_Bcast(1832)....................: fail failed
      I_MPIR_Bcast_intra(2056)............: Failure during collective
      I_MPIR_Bcast_intra(2043)............: fail failed
      MPIR_Bcast_advanced(2135)...........: fail failed
      MPIR_Bcast_intra(1599)..............: fail failed

      I am getting this while running Random Vibration analysis.
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