how to add damping to make results stable

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

dear all

      I have made a impacting analysis, but after impacting the object is oscillating. how to add damping to the model to remove the oscillating? Thanks!<?xml version="1.0" encoding="UTF-8"?>b.jpg

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Hi,

    Can you elaborate bit more?.

    If possible, please share the files to my dropbox (input files, out files, .h3d and T01file)

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

    Hi,

    Can you elaborate bit more?.

    If possible, please share the files to my dropbox (input files, out files, .h3d and T01file)

    Hi,

       Thanks for your answering. But I can not open your dropbox, I uploaded files there.

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Hi,

    This model behavior  is dependent on the material characteristics provided and also 2 mm thick. And the boundary conditions also play a role in this,

     This is the desired behavior of the model in this loading condition.

     

     

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016
    Altair Forum User said:

    Hi,

    This model behavior  is dependent on the material characteristics provided and also 2 mm thick. And the boundary conditions also play a role in this,

     This is the desired behavior of the model in this loading condition.

     

     

     

     

    hi,

       Thanks for your answering!

       You mean the oscillating can not be removed by adding damping? If it is possible, how to add damping?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016

    Hi,

    For defining damping in Radioss, you can use /DAMP keyword in engine file. This keyword can be used to define the Rayleigh mass and stiffness damping coefficients applied to a set of nodes.

    To know about the input parameters, please refer our help menu.

    Please refer this example where damping is applied:  http://www.altairuniversity.com/wp-content/uploads/2012/08/Example_16.pdf

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2016
    Altair Forum User said:

    Hi,

    For defining damping in Radioss, you can use /DAMP keyword in engine file. This keyword can be used to define the Rayleigh mass and stiffness damping coefficients applied to a set of nodes.

    To know about the input parameters, please refer our help menu.

    Please refer this example where damping is applied:  http://www.altairuniversity.com/wp-content/uploads/2012/08/Example_16.pdf

    Thanks!

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