Modal analysis question

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

Do we have to provide acceleration ('g' value) while doing modal analysis? 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2018

    Hi Mayur,

     

    Vibration is often measured in Gs (accelerometer) and it is convenient to use that way most of the time. 

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited January 2018
    Altair Forum User said:

    Do we have to provide acceleration ('g' value) while doing modal analysis? 

    Modal analysis means that no external force is acting on the system thus there is no input of g during the modal analysis. However  if we couple it with frequency response, then we need to apply some external loading which can be in the form of displacement, velocity or acceleration, depending on the vibration testing profile.

    Check with experimental testing data if you have for the vibration profile .

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