I am entering data for a response spectrum analysis with acceleration input. I am using a CQC method and including missing mass effects. Question: The load data is being scaled. When I specify the missing mass effect ZPA, do I enter the raw data value or do I enter the raw data multiplied by the scaling factor?

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I am entering data for a response spectrum analysis with acceleration input. I am using a CQC method and including missing mass effects. Question: The load data is being scaled. When I specify the missing mass effect ZPA, do I enter the raw data value or do I enter the raw data multiplied by the scaling factor?

I am entering data for a response spectrum analysis with acceleration input. I am using a CQC method and including missing mass effects. Question: The load data is being scaled. When I specify the missing mass effect ZPA, do I enter the raw data value or do I enter the raw data multiplied by the scaling factor?

Tagged: 17.2, General, mechanical-apdl, response spectrum, structural-dynamics, structural-mechanics

- June 5, 2023 at 7:04 am
  
  FAQ
  Participant
  
  You input the unscaled value for ZPA according to the MMASS command doc. Check the ds.dat file to make sure Mechanical isn’t scaling it when it writes the MMASS command though.

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