Reply To: Probem with modal Analysis

[Erik Kostson]

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