mass scaling in crash

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

Any body please share me how to check the mass scaling in impact analysis ( for full car vehicle) in radioss. If any one have any example that will be greatful.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2023

    can you please tell me how to use mass scaling in hypercrash

     

    Hi,

    For mass scaling you can use the Engine-Keyword /DT/NODA/CST, that you can use to scale the timestep and to force a minimum timestep for your calculation.

    Either you can enter this manually in the engine file or you can activate the control card in HyperMesh/HyperCrash.

    The image attached shows activating the control card in HyperCrash.

     

    /DT/NODA/CST is the formatwhere Tsca is 0.9 Tmin is the Minimum time step user desired to input.

    symbol_tri-boldTsca   symbol_tri-boldTmin

     

    dtnoda.PNG

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2016

    In the engine out file DM/M value in the last column in the RADIOSS Engine listing file will show the total mass added to the model.

    For post processing of the added mass, enter the keyword  /AIM/NODA/DMAS which gives Nodal mass variation. User can verify the animation files written with this keyword.

     

    Impact Analysis tutorials are available in the RADIOSS help menu. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2016

    thank you very much sir 

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