Analyses on low cycle resonance of ships in irregular astern seas

Abstract

In order to investigate capsizing caused by low cycle resonance of ships running in irregular astern seas, an analytical approach has been conducted for computing the fluctuation of metacentric height in irregular astern seas and the power spectrum of metacentric height has been obtained from the time histories of it. The unstable regions of low cycle resonance have been discussed for a container ship and a purse seiner on the basis of Mathieu's equation.