0n the Calculation of Springing Vibration in Irregular Waves : 1st Report

Abstract

The calculation method of springing vibration in irregular waves has been studied. In this report, however, numerical calculation of response of three large tankers (D.W. 130,000 tons, 230,000 tons and 280,000 tons) in regular waves has been carried out in order to investigate the tendency of springing phenomena. In results following facts are clarified. l) As ships grow larger, response becomes bigger. 2) In case of D.W. 130,000 ton tanker, responses of 2nd and 3rd resonance are very small in comparison with that of primary resonance but in case of D.W. 230,000 ton and 280,000 ton tankers, responses of 2nd and 3rd resonance are not negligib1e.