modal analysis

SHRIKAR WADADARE
SHRIKAR WADADARE Altair Community Member
edited November 2023 in Community Q&A

I am trying to do a modal analysis of individual leaf mounts for transmission as well as assembly, where I have included the weight of the motor and differential at their respective cg. I connected the conm2 using an rbe3 element to their respective mountings on the leaf mounts and also created rbe2 elements at the holes where the mounts will be attached to the chassis and assigned a SPC there. I used the EIGRL card and gave nd as 20 and have not given a frequency range. But the issue I am facing is that I am not getting any rigid modes, which I should be getting six of. I am sure I have appropriately constrained all my models. Can anyone help me figure out where I could be wrong or missing something.

please

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Best Answer

  • Chayan
    Chayan
    Altair Employee
    edited November 2023 Answer ✓

    Shrikar, If you are using a constrained model, you will not see any rigid body modes. Rigid body modes will only show when you have a free free model.

Answers

  • Chayan
    Chayan
    Altair Employee
    edited November 2023 Answer ✓

    Shrikar, If you are using a constrained model, you will not see any rigid body modes. Rigid body modes will only show when you have a free free model.

  • SHRIKAR WADADARE
    SHRIKAR WADADARE Altair Community Member
    edited June 2023

    Thank you ! 

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