Follower force in optistruct

gopal_rathore
gopal_rathore Altair Community Member
edited October 2020 in Community Q&A

Hi @Prakash Pagadala

I am working on a structure on which follower force has to be applied . I have made the coordinate systems for follower force but not able to get the follower force phenomena.

I  have sent the files through secure link. Kindly check.

 

Thank you

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Answers

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi @Prakash Pagadala

     

    Have you gone through the model? Kindly let me know.

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Gopal,

     

    I got the file and I will look into this.

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Ok thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    Hi Gopal,

     

    Looks like it is a large strain problem,

     

    Can you try with NLGEOM instead of NLSTAT?

     

    or You can use NLSTAT, LGDISP= 1 with FLLWER card. I am sharing an example model

    Unable to find an attachment - read this blog

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi @Prakash Pagadala

    I have send you a file for NLGEOM contact issue , please check.

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Gopal,

     

    I am unable to open the FTP link for some reasons. Can you resend the file please?

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi,

    I have send the files for NLGEOM contact problem.

     

    Thank you.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Gopal,

     

    Please try with these settings shown in image:

     

    One more thing is that I don't think follower load will work for enforced displacements as you are trying to enforce displacement on nodes in a particular direction and at the same time follow the change in geom.

     

    Please try that and let us know your findings. 

     

    <?xml version="1.0" encoding="UTF-8"?>gopalNGEOM.PNG

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi,

    I have used the above parameters. I am using version 13 and thus do not have track parameter. There is problem in  contact as earlier. The run starts well with first detection of contact but as time progresses the contact is lost.

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Hi Gopal,

     

    What do you mean by contact is lost? Does the plate component is penetrating into another component?

     

    Can you share an image or h3d file?

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi,

    Please find the attached file.

     

    Thank you

    <?xml version="1.0" encoding="UTF-8"?>contact issue.gif

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Gopal,

     

    This is what I have with above settings:

     

    <?xml version="1.0" encoding="UTF-8"?>GR.gif

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi,

    Behaviour in your animation is coming correctly it seems. Is this version issue?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Gopal,

     

    Which version are you using?

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Hi,

    HW 13

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2017

    Gopal,

     

    I will check in 13.0 as well and will let you about this. But I think this has something to do with version. 

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited September 2017

    Ok. Kindly check at your end in 13.

     

    Thank you

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited October 2017

    Hi,

    Have you run the model in 13 version?

     

    Thank you

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2017

    Hi Gopal,

     

    yeah, it is still running and it is been an hour. I will update you soon. 

     

    BTW, I am using HW 13.0 without any patch updates.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2017

    Hi Gopal,

     

    The result is same as yours with 13.0 without updates. So the issue is with the version. Can you update the 13.0 to the latest available patch and check if that works?

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