瘫船稳性横摇周期计算方法讨论分析  

Analysis on the calculating method of rolling period for dead ship stability

作　　者：马坤[1] 梅树猛 于津钊 MA Kun;MEI Shumeng;YU Jinzhao(School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024

出　　处：《中国舰船研究》2020年第3期32-37,共6页Chinese Journal of Ship Research

摘　　要：[目的]国际海事组织(IMO)对第2代完整稳性衡准的制定工作正处于不断推进与完善阶段,其中,瘫船稳性第1,2层薄弱性评估方法因是基于不同的原理制定,故样船评估结果的一致性问题较为明显,需进一步讨论分析评估方法的准确性。[方法]横摇周期是影响评估结果的主要因素。首先,基于船舶运动微分方程,对使用现有横摇周期计算方法进行评估存在的问题予以分析讨论;然后,将SDC 5/6/8标准中的横摇周期计算方法运用到瘫船稳性第1层薄弱性衡准中,编写程序;最后,选取24艘样船72种载况,采用现有方法和修正方法对计算结果进行对比分析[结果]结果表明,对于非线性特征明显的船舶,使用该横摇周期计算方法进行薄弱性评估,可以得到更加准确的结果。[结论]建议使用基于非线性的横摇周期计算方法进行薄弱性评估以及后续操作限制的制定。[Objectives]The formulation of the second generation intact stability criterion by IMO is in the stage of continuous improvement.As the first and second level vulnerability assessment methods of dead ship stability are based on different principles,the inconsistency of evaluation results is obvious,so that the accuracy of the assessment methods needs to be further discussed and analyzed.[Methods]Rolling period is the main factor affecting the evaluation results.Firstly,based on the differential equation of ship motion,the problems using the existing rolling period calculation method to evaluate were analyzed and discussed;secondly,the calculation method of rolling period in SDC 5/6/8 was applied to the first level vulnerability criteria of dead ship stability,the corresponding program was written as well;24 sample ships including 72 loading conditions were selected to compare and analyze the calculation results by using the existing and modified method.[Results]The results show that,for the ships with obvious non-linear characteristics,more accurate results can be obtained by using the rolling period calculation method to evaluate the vulnerability.[Conclusions]It is suggested to evaluate the weakness and formulate the subsequent operation limitation with the calculation method of non-linearity-based rolling period.

关 键 词：第2代完整稳性衡准 瘫船稳性 横摇周期 计算方法 

分 类 号：U661.22[交通运输工程—船舶及航道工程]