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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Probem with modal Analysis › Reply To: Probem with modal Analysis

April 1, 2024 at 2:38 pm
ErKo
Ansys Employee

Make sure all your elements are connected - for a large ship frequencies of global modes (say 1st bending mode) should be below the local panel modes.

Acoustic elements are way to complicated and comp. intensive for a global analysis of ships (vibration).

There used to be a Guyan reduction to do as you mentioned, but since the mass (matrix - depends of choice of masters which is tricky) is approximate I do not think it is supported anymore.

All the best

Erik

 

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