大型箱体浮式结构拖带动力响应物理模型试验研究  

Physical model test on dynamic response of large box floating structure under towing

作　　者：冯曦 高子骋 徐嘉言 顾浩洋 豆斐 FENG Xi;GAO Zicheng;XU Jiayan;GU Haoyang;DOU Fei(College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;Jiangsu Province Offshore Intelligent Detection Equipment and Technology Innovation Platform,Nanjing 210098,China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098 [2]江苏省近海智能探测装备与技术创新平台,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2024年第5期67-75,共9页Journal of Hohai University(Natural Sciences)

基　　金：国家重点研发计划2022年度“智能机器人”重点专项(2022YFB4703401);装备预研教育部联合基金项目(8091B0221231);江苏省近海智能探测装备与技术创新平台开放课题项目(202202)。

摘　　要：为研究大型箱体浮式结构在海上运输过程中的作业安全问题,开展了正常作业条件下浮式结构拖带时的水动力响应物理模型试验,以不规则波浪荷载作用下浮式结构的六自由度运动量为主要研究对象,从各运动量谱的演变规律出发,探讨了在不同有效波高、平均波周期和拖带速度情况下浮式结构的运动响应。结果表明:迎浪拖带时,纵摇与垂荡两自由度对不规则波浪荷载响应较为稳定,且对平均波周期和拖带速度较为敏感;随着平均波周期增大,两者的运动量谱从多峰谱过渡为单峰谱,谱形逐渐规则且束窄,谱峰频率与波浪谱峰频率接近,相对谱峰频率在1左右且随着平均波周期增大而增大;随着拖带速度增大,垂荡运动量谱的谱形逐渐尖陡,谱峰密度、相对谱峰密度均增大,水动力响应加剧;垂荡最大可能距离和最大可能纵摇角度均随有效波高增大而增大,最大可能纵摇角度随拖带速度增大而减小。In order to study the operational safety of large box floating structures during sea transportation,a physical experiment of hydrodynamic response of floating structures during reverse towing under normal operating conditions was carried out.From perspective of the evolution law of motion spectrum,the six-degree-of-freedom movement of floating structures under irregular wave action was regarded as the studying object.The motion response of the floating structure under the change of significant wave height,mean wave period and towing speed was discussed.The results show that pitch and heave yield a stationary response to the irregular wave load,and are sensitive to average wave period and towing speed.With the increase of the mean wave period,the motion spectra of the pitch and heave transition from multi-peak spectrum to single-peak spectrum,with the shape of the spectrum turning regular and narrowing gradually.In addition,the peak frequency is close to that of the wave spectrum,and the relative peak frequencyis close to 1 and increases with the increased mean wave period.With the increase of towing speed,the shape of heave motion spectrum is gradually sharp and steep,and the relative spectral peak as well as the spectrum peak density grows,indicating intensified hydrodynamic response.Last,the maximum possible heave distance and the maximum possible pitch angle increase with the enhanced wave height,and the maximum possible pitch angle decreases with raised towing speed.

关 键 词：大型箱体浮式结构 拖带物理模型试验 不规则波 水动力响应 

分 类 号：TV139.2[水利工程—水力学及河流动力学]