Modeling and simulation of main engine excitation on board vessels

The prediction of the vibro-acoustic behavior of vessels at every stage of the design process helps to identify acoustic problems and to optimize ship designs. In order to simulate the sound, noise and vibration transfer into ship structures, the sources of excitation need to be modeled. On board a vessel combustion engines are relevant sources of structure-borne noise, which introduce vibrations into the foundation as a result of the combustion process. A numerical model of the engine excitation is developed and systemlevel simulations are performed. A scaled torsional vibration test stand is used to verify the proposed simulation approach.