Difference b/w NSM and point mass

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

Team,

what is the difference b/w Non structural mass and point mass application?

In what conditions we should apply NSM and point mass?

How it will be differ if we apply mass by using RBe3 and NSM

Thanks

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2017

    Hi,

    Non-structural mass is generally used in cases where there is no structural contribution, but the mass is significant. Mass that is present in the system and will affect the dynamic response but it is not a part of the structural mass. As an example, additional mass such as the fuel loading in an aircraft wing. While this additional mass won't affect the structural stiffness of the model, it is present and could affect the loading and dynamic behavior. In point mass application a concentrated mass at a grid point of the structural model is applied.

    Through RBE3 it is possible to apply load but it can cause a bending/twisting moment. Based on applications we will choose the method.

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