Study for the Nonlinear Rolling Motion of Ships in Beam Seas

• 발행기관: 한국항해항만학회
• 저자명: Zhan-Jun Long Seung-Keon Lee Jae-Hun Jeong Sung-Jong Lee
• 간행물 정보: 『한국항해항만학회 학술대회논문집』2009 추계학술대회논문집, 239~240쪽, 전체 2쪽
• 주제분류: 공학 > 해양공학
• 파일형태: PDF
• 발행일자: 2009.10.30

영문 초록

Vessels stability problems need to resolve the nonlinear mathematical models of rolling motion. For nonlinear systems subjected to random excitations, there are very few special cases can obtain the exact solutions. In this paper, the specific differential equations of rolling motion for intact ship considering the restoring and damping moment have researched firstly. Then the partial stochastic linearization method is applied to study the response statistics of nonlinear ship rolling motion in beam seas. The ship rolling nonlinear stochastic differential equation is then solved approximately by keeping the equivalent damping coefficient as a parameter and nonlinear response of the ship is determined in the frequency domain by a linear analysis method finally.

목차

1. Introduction

2. Concept of partial linearization nonlinear stochastic system

3. Certificaition of equivalent damping coefficient for test ship

4. Result and discussions

5. Conclusions

키워드

Ship stability Non-linear dynamical systems Roll damping Safety of ships