TableD1 - frequency/Transient analysis

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

For TableD1 units,

 

TableD1 used in transient analysis, the units are as follows:

x axis - seconds (s)

y - axis - acceleration (mm/s)

 

TableD1 used in frequency analysis, the units are as follows:

x - axis - Frequency (Hz)

y - axis - Magnitude (dB)

 

is this correct?

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited March 2016

    In TABLED1 card for FRF analysis X defines frequencies and Y defines the excitation.

    Provide consistent units.Hm optistruct is unitless.

    See below post for reference.

     

     

    Regards

    Rahul R

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Does SPCD also define excitation?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    does SPCD (if used for acceleration) define excitation as well?

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

    does SPCD (if used for acceleration) define excitation as well?

    Yes,

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