SOURCES OF VERTICAL VIBRATION GENERATING DYNAMIC LOADS IN THE NAVAL BEAMS

The main reason causing general stabilized hall vibration is the main mechanisms functioning, and periodic variation of hydrodynamic pressure force that strains the plating of the ship. This hydrodynamic pressure reaches maximum strain around the propellers zone. General vibration of the hall cause local vibrations of different parts of the ship since general vibrations causes movement of support structures of the hull. In some cases considerable local vibrations are caused by the auxiliary mechanisms, especially of those having pistons. Auxiliary mechanisms functioning in unfavorable conditions may cause general vibrations, too.