CALCULATED NATURAL FREQUENCIES, NORMAL MODES, AND FORCED RESPONSE OF HULL AND PROPULSION SYSTEM OF USS SKIPJACK (SSN 585)

摘要

Normal mode shapes and natural frequencies of vertical flexural vibration of the hull and of longitudinal vibration of the hull-propulsion shafting system were calculated for USS SKIPJACK (SSN 585) on a digital computer. Calculations include the forced damped response of the ship to sinusoidal forcing functions applied at the stern of ship. For longitu-dinal vibrations, the forcing function was also applied to the propeller.