刘 庄1，赵云鹏1，王欣欣2，董国海1
（1 大连理工大学，港口海岸和近海工程国家重点实验室，辽宁 大连 116024；
2 中国海洋大学水产学院，山东 青岛 266003）

摘要：在极端海况下，可升降式筏式养殖设施能够通过下潜来躲避风浪，降低波浪力作用，减免损失。为研究波浪作用下可升降式筏式养殖设施的水动力特性，采用集中质量法建立了筏式养殖设施漂浮及下潜时的数学模型，采用龙格库塔法对其进行求解，并将数值模拟结果与物理模型试验结果进行比较，二者吻合程度较好且变化趋势相同，表明数值模拟的方法能够较好地模拟可升降式筏式养殖设施的水动力特性。在此基础上，用数值模拟法进一步研究波高和周期变化对浮筏运动特性的影响，以及下潜对浮筏运动和锚绳力的影响。模拟结果显示，不同波高和周期变化对浮筏运动特性产生不同程度的影响，同时浮筏下潜后的运动幅度和锚绳力幅值明显减小。

关键词：筏式养殖；可升降式浮筏；水动力特性；波浪；数值模拟

Numerical investigation of hydrodynamic behavior of submersible raft in waves
LIU Zhuang1，ZHAO Yunpeng1，WANG Xinxin2，DONG Guohai1
(1 State Key Lab of Coastal and Offshore Engineering , Dalian University of Technology, Dalian 116024 China；
2 Fisheries College, Ocean University of China, Qingdao 266003 China)

Abstract: The submersible raft can avoid storms and waves and reduce wave force through submergence in the extreme ocean environment to reduce losses. In order to investigate the hydrodynamic behavior of submersible raft in waves, the surfaced and the submerged mathematical models are established, using lumped mass method. The numerical solution can be obtained using the Runge-Kutta method and the results of the numerical simulation are compared with the results in physical experiment. The numerical results agree well with the corresponding experimental data and their change trend is basically same. It indicates that the method of numerical simulation can simulate the hydrodynamic behavior of submersible raft well. Based on numerical simulation method, the influences of wave height and periodic variation on the movement of the system with raft at the surface are compared. The influences of submergence on the movement of the system with raft at the surface and mooring line force are also compared. The numerical results show that different wave height and periodic variation have different influences on the movement of the system with raft at the surface and the motion amplitude and mooring force decreases obviously after the raft submerged.

Key words: raft cultivation; submersible raft; hydrodynamic behavior; wave; numerical simulation