Modal Analysis

- May 29, 2023 at 7:24 am
  
  Fatur Rizki Anggun Juniar
  Subscriber
  
  When we use free-free modal analysis and pre-stressed modal analysis, then how many modes must be extracted to produce the corresponding mode shape? In the mass capital participation factor, is there a total effective mass value that is used as a reference as the actual value of the total mass of the system. If so, how much is it worth?
- May 29, 2023 at 8:34 am
  
  Raihan Lutfianto
  Subscriber
  
  Hi Fatur, good question. We can use a ratio of effective mass to total mass value of 0.9. This ensures we extract a sufficient number of modes for our problem.

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