CAJ | 학술논문

国际海事组织正在制定第二代完整稳性衡准中有关参数横摇的直接稳性评估方法，本文提出了三种顶浪参数横摇数值方法。首先是单自由度横摇运动数学模型，考虑了无横倾时垂荡、纵摇运动对横摇力矩中非线性的 Froude-Krylov 力的影响；其次在单自由度数学模型的基础上进一步根据横摇角动态考虑了非线性的辐射力和绕射力；然后是垂荡-横摇-纵摇耦合的三自由度耦合数学模型，其中通过对瞬时湿表面积分得到非线性的 Froude-Krylov 力，考虑瞬时横摇角度对瞬时湿表面的影响计算辐射力和绕射力。最后采用国际海事组织提供的集装箱船型，通过比较计算结果和试验结果，证实这三种数值方法的有效性。
국제해사조직정재제정제이대완정은성형준중유관삼수횡요적직접은성평고방법，본문제출료삼충정랑삼수횡요수치방법。수선시단자유도횡요운동수학모형，고필료무횡경시수탕、종요운동대횡요력구중비선성적 Froude-Krylov 력적영향；기차재단자유도수학모형적기출상진일보근거횡요각동태고필료비선성적복사력화요사력；연후시수탕-횡요-종요우합적삼자유도우합수학모형，기중통과대순시습표면적분득도비선성적 Froude-Krylov 력，고필순시횡요각도대순시습표면적영향계산복사력화요사력。최후채용국제해사조직제공적집장상선형，통과비교계산결과화시험결과，증실저삼충수치방법적유효성。
A direct stability assessment on parametric rolling in the second intact stability criteria is under development by International Maritime Organization (IMO). Three numerical approaches on parametric rolling in head seas are considered in this paper. One of the mathematical models is a single rolling model, in which heave and pitch motions without heeling are taken into account to estimate restoring variation. In the second method, radiation and diffraction force is acted on heeling hull, and then the hydrodynamic effects of restoring variation are considered. The third model is heave-roll-pitch coupled model, in which the nonlinear Froude-Krylov component is calculated by integrating wave pressure up to wave surface and radiation, and diffraction forces are calculated for the instantaneous submerged hull by considering the time-dependent rolling angle. Finally, the numerical approaches on parametric rolling are verified with experimental results for a standard container ship.