摘要
旁靠外输是海洋工程领域常见的作业形式,而浮体之间存在狭窄的间隙会产生复杂的水动力相互干扰。应用三维频域势流理论和阻尼盖模型,对旁靠双浮体系统进行频域计算,然后基于间接时域法开展该旁靠系统运动的时域模拟。研究结果表明,阻尼盖模型能有效抑制水动力系数异常的共振幅值和改善时延函数的振荡特性。当波峰频率接近间隙水动力峰值频率时形成间隙共振,对时域运动计算结果影响较大。在横浪条件下,旁靠系统会产生较大的横向相对位移,加装防撞系统可在一定程度上控制该相对位移。
Side-by-side offloading is a common operation in the field of ocean engineering.Due to the lack of viscosity in the traditional potential method,complex hydrodynamic interaction between the side-by-side multi-floating bodies will occur.Based on the 3D potential flow theory and damping lid model,computation of the multi-floating-body system in the frequency-domain is carried out,and the indirect time-domain method is applied to the simulation of the time-domain.The results show that the damping lid model can effectively suppress the abnormal resonance amplitude of hydrodynamic coefficients and improve the calculation of the retardation function.When the spectral peak frequency is close to the gap resonance frequency,the gap resonance has a great influence on the motion history.Relative transverse displacement of the side-by-side system can be controlled to a certain extent by adding fenders in beam waves.
作者
陈天文
范菊
CHEN Tianwen;FAN Ju(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《中国造船》
EI
CSCD
北大核心
2023年第3期80-89,共10页
Shipbuilding of China
关键词
间隙共振
阻尼盖法
旁靠外输系统
间接时域法
水动力相互干扰
gap resonance
damping lid method
side-by-side offloading system
indirect time domain method
hydrodynamic interaction
