波流入射方向对网格式锚碇网箱水动力特性的影响  

Effects of direction of incident wave-current on single grid mooring net cage under combined wave-current action

作　　者：陈昌平[1,2] 李玉成[1] 赵云鹏[1] 董国海[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连水产学院,辽宁大连116023

出　　处：《中国水产科学》2010年第4期828-838,共11页Journal of Fishery Sciences of China

基　　金：国家自然科学基金资助项目(50809014);国家863计划资助项目(2006AA100301);高等学校博士学科点专项科研基金资助课题(200801411094)

摘　　要：运用集中质量方法和刚体运动学原理,建立了单体网格式网箱在波流联合作用下浮架、网衣和锚碇系统受力和运动的数学模型。利用物理模型试验对本数学模型的正确性进行了验证。在此基础上计算了2种波流作用方向、各工况下单体网格式网箱3类锚绳(锚碇锚绳、连接锚绳、网格锚绳)受力、浮架运动及网衣变形的结果,并分析了波流作用方向对网格式锚碇网箱水动力特性的影响。结果表明,当波流作用方向由正向变为斜向(45°)时,锚碇锚绳与连接锚绳受力有较大程度的增加,网格锚绳受力有较小程度的增加;浮架水平方向、竖直方向运动幅度有一定程度减小,浮架倾角及网衣变形变化不明显。Based on lumped mass method and rigid body kinematics theory,a mathematical model of the gravity cage has been developed. In order to verify the mathematical model,a series of physical model tests have been carried out. According to the comparisons between simulated and experimental results,it can be found that our simulated and experimental results agree well in each condition. Then,the effects of direction of incident wave-current propagation on hydrodynamic behaviors of gravity cage are analyzed. According to the simulated results,it can be found that when the wave-current propagation direction varied from normal to oblique,the mooring line forces in main ropes and bridle ropes increased obviously,and the mooring line forces in grid ropes increased little. With the propagation direction of incident wave-current increasing,the horizontal and vertical motion amplitude of the floating collar decreased,while the variation of the floating collar inclination and the net deformations were small.

关 键 词：网格式锚碇 波流作用 数值模拟 水动力特性 

分 类 号：P731.2[天文地球—海洋科学]