长峰与短峰不规则波对船舶运动与波浪载荷的影响分析  

Difference in ship motion and wave load in long and short crested irregular waves

作　　者：焦甲龙 张皓 陈远明[1] 孙树政[3] JIAO Jialong;ZHANG Hao;CHEN Yuanming;SUN Shuzheng(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China;Nuclear Power Institute of China,Chengdu 610200,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]中国核动力研究设计院,四川成都610200 [3]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《中国舰船研究》2023年第1期107-115,共9页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51909096);广东省自然科学基金资助项目(2022A1515010453);黑龙江省自然科学基金资助项目(LH2019E034)。

摘　　要：[目的]为了研究真实三维海况短峰波中船舶运动与波浪载荷响应,克服现阶段二维长峰波假设的思路束缚,提出一种短峰波中船舶运动与波浪载荷的预报方法。[方法]基于频域谱分析法和概率统计法,预报二维长峰不规则波及三维短峰不规则波中船舶运动与载荷响应的短期及长期统计值,并分析短峰波方向函数对船舶运动与载荷响应的影响。随后,基于水池模型试验和大尺度模型海上试验,对比验证长峰与短峰不规则波中船舶运动与载荷短期响应谱及概率统计值的差异性。[结果]结果显示,在同等级海况下迎浪航行时,长峰波会夸大船舶的载荷响应统计均值,而低估真实海浪下的极值载荷;二维长峰波中的船舶运动及加速度能量集中在某一频率附近。[结论]船舶在真实三维海浪中的运动与载荷响应与二维长峰波中的响应存在显著差异,短峰波方向函数对船舶运动与载荷响应有着显著影响。[Objective]To investigate ship motion and load responses in realistic 3D waves and overcome the limitations of the traditional 2D wave assumption,this paper develops a method for predicting ship motion and load responses in short-crested waves.[Method]The long-and short-term responses of ship motion and load in long-and short-crested waves are numerically predicted using the spectral analysis and statistical probability methods,respectively.The influence of directional function on ship response is also numerically analyzed.Moreover,tank model tests and a large-scale model sea trial are comparatively conducted to validate the difference between ship response and statistics in long-and short-crested irregular waves.[Results]The results show that when navigating against the waves in the same sea condition,the long-crested wave assumption overestimates the statistical mean value of ship load response,but underestimates extreme load in real seas.For long-crested waves,the ship motion and acceleration power spectrum is concentrated around a certain frequency band.[Conclusion]Ship motion and load responses in realistic 3D waves are significantly different from those in 2D long-crested waves.The directional function of short-crested waves also has a significant effect on ship motion and load responses.

关 键 词：短峰不规则波 方向函数 船舶耐波性 波浪载荷 运动与载荷响应 

分 类 号：U661.1[交通运输工程—船舶及航道工程]