Analyses on the Behaviour of Ocean Structure Due to Ship Collision

J. Ocean Eng. Technol. 2001;15(4):115-119.

선박의 충돌로 인한 해양구조물의 거동 해석

이호영,박종환,곽영기

목포대학교 공과대학 선박해양공학과,목포대학교 공과대학 선박해양공학과,목포대학교 공과대학 선박해양공학과

Keywords: Time domain, Memory effect function, Elastic collision, Non-elastic collision, Dolphin mooring systems

핵심용어: 시간영역, 기억효과함수, 탄성충돌, 비탄성충동, 돌핀계류계

Abstract

The simulation of motion responses of a dolphin-moored ocean structure in shallow water when it cllides with a ship, has been carried out. The equation of motion in the time domain according to Cummin's theory is employed, and solved by making use of the Newmark-${eta}$ method. The added mass and damping coefficients involved in the equations are abtained from a three-dimensional panel method in the frequency domain. The impact forces due to ship collision are calculated using both the elastic and non-elastic modelings. The mooring forces for dolphin systems of ocean structure are regarded as linear spring forces.