Fluid structure interaction

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

During modal analysis under pressure and fluid structure interaction i got below error

 


 *** ERROR # 2310 *** in the input data:
 MFLUID card must be used above the first SUBCASE.

 

can anyone please help with this.

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hi @viketh

     

    Can you share the model file, please?

     

    Please use the file transfer link in my signature to share the model file

  • Kamil
    Kamil Altair Community Member
    edited June 2019
    Altair Forum User said:

    During modal analysis under pressure and fluid structure interaction i got below error

     


     *** ERROR # 2310 *** in the input data:
     MFLUID card must be used above the first SUBCASE.

     

    can anyone please help with this.

    I'm also getting same error message.

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited June 2019

    Could you please share the .out file of the run?

  • Kamil
    Kamil Altair Community Member
    edited June 2019

    Hi,

    I want to solve bolt pretension as a subcase 1 and  normal mode shape with bolt pretension as a subcase 2.  Please refer attached file.fem

    Following error message getting from optistruct  (Mfluid).

    1) Error # 2310 - Mfluid card must be used above the first subcase.

    2) Fatal error # 5255 - the number of wetted element for virtual mass exceeds the current maximum allowed with VMOPT, 1. (This error got after removal of bolt pretension subcase.)

    Unable to find an attachment - read this blog

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited June 2019

    Please remove the Mfluid from the subcase for modal analysis and reference it using the GLOBAL_CASE_CONTROL card (Mfluid). 

  • Kamil
    Kamil Altair Community Member
    edited June 2019

    Sir,

    1) Mfluid not available in global_case_control card. (Under Optistruct user profile).

    2) How to increase allowable number of elements in VMOPT, 1. (Fatal error #5255)

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited June 2019

    I see you are using 14.0 version which is bit old and missing some key features.I ran shared file in latest version 2019 and it run fine with above suggested changes.

  • Kamil
    Kamil Altair Community Member
    edited June 2019

    Yes I'm using 14.0 version.

  • Kamil
    Kamil Altair Community Member
    edited June 2019
    Altair Forum User said:

    Hi,

    I want to solve bolt pretension as a subcase 1 and  normal mode shape with bolt pretension as a subcase 2.  Please refer attached file.fem

    Following error message getting from optistruct  (Mfluid).

    1) Error # 2310 - Mfluid card must be used above the first subcase.

    2) Fatal error # 5255 - the number of wetted element for virtual mass exceeds the current maximum allowed with VMOPT, 1. (This error got after removal of bolt pretension subcase.)

    Sir,

    How to simulate rolling and pitching effect. Rolling 10 degree for 5 sec and pitch 30 degree for 10 sec.

    Unable to find an attachment - read this blog

Categories