| 系泊和压载方式对半潜式渔场平台动力特性的影响 |
| |
| 引用本文： | 黄小华,王芳芳,刘海阳,胡昱,王占行,王绍敏,赵云鹏.系泊和压载方式对半潜式渔场平台动力特性的影响[J].农业工程学报,2019,35(15):48-53. |
| |
| 作者姓名： | 黄小华 王芳芳 刘海阳 胡昱 王占行 王绍敏 赵云鹏 |
| |
| 作者单位： | 中国水产科学研究院南海水产研究所广东省网箱工程技术研究中心农业部外海渔业开发重点实验室;大连理工大学海岸和近海工程国家重点实验室;中国水产科学研究院渔业工程研究所 |
| |
| 基金项目： | 国家自然科学基金项目（31772897,31402349）;海南省重大科技计划项目（ZDKJ2016011）;海洋经济创新发展区域示范专项（Bhsfs012）; |
| |
| 摘 要： | 为了解渔场平台的耐波性及稳性,为渔场平台主体结构设计和海上安装提供理论依据和数据支撑,该研究针对一种半潜式桁架结构渔场平台开展了模型比尺为1:30的波浪水池试验,通过试验分别研究了渔场平台在3种系泊方式(锚链长度2.67、5.34、5.34 m并悬挂200 g重块)、3种压载状态(空载、半载和满载)和6种波况(波高为16.7～23.3 cm,周期为1.64 s和2.01 s)条件下的动力响应情况,比较分析了不同条件下渔场平台系泊力、升沉、纵摇和横摇的试验结果。结果表明,选用5.34 m长度锚链并悬挂200 g重块的单点系泊系统,能够更好的降低渔场平台的系泊力。在所有波况条件下,渔场平台的各运动分量的峰值均比较小,最大升沉峰值为4.21 cm,仅占波高的约1/5,纵摇峰值仅为6.55°,横摇峰值仅为1.19°,表明渔场平台具有较好的稳性。比较3种不同压载状态,其中满载状态下渔场平台的系泊力、纵摇及横摇峰值最大,但在空载状态下渔场平台的升沉峰值最大。随着波高的增大,渔场平台的运动受力均有所增大。研究结果有助于为今后我国半潜式渔场平台发展提供一定的理论参考。
|
| 关 键 词： | 水产养殖 波浪 动力学 渔场平台 单点系泊 压载状态 |
| 收稿时间： | 2019/2/18 0:00:00 |
| 修稿时间： | 2019/5/15 0:00:00 |
Effects of mooring systems and ballast status on dynamic behaviors of semi-submersible offshore fish farm |
| |
| Huang Xiaohu,Wang Fangfang,Liu Haiyang,Hu Yu,Wang Zhanhang,Wang Shaomin and Zhao Yunpeng.Effects of mooring systems and ballast status on dynamic behaviors of semi-submersible offshore fish farm[J].Transactions of the Chinese Society of Agricultural Engineering,2019,35(15):48-53. |
| |
| Authors: | Huang Xiaohu Wang Fangfang Liu Haiyang Hu Yu Wang Zhanhang Wang Shaomin and Zhao Yunpeng |
| |
| Institution: | 1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture, Guangdong Cage Engineering Research Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;,1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture, Guangdong Cage Engineering Research Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;,1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture, Guangdong Cage Engineering Research Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;,1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture, Guangdong Cage Engineering Research Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;,3. Fishery Engineering Research Institute, Chinese Academy of Fishery Sciences, Beijing 100141, China;,1. Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture, Guangdong Cage Engineering Research Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; and 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; |
| |
| Abstract: | In recent years, due to various environmental problems and resource conflicts in coastal areas, nearshore mariculture in China has been increasingly confronted with the severe challenge of space compression. However, in more exposed sea areas with the depth exceeds 20 m, the water quality is much better and the water utilization rate is much lower, less than 1%. With the development of aquaculture technology and equipment engineering, it is an inevitable trend for fish farms to transfer to offshore areas. To reduce the risk of fish farming in open sea areas with strong waves and current, offshore fish farm that having the distinct advantages with moderlization of culture and management were encouraged to develop in the past two years in China. Generally, offshore farm was considered as an integrated farming system composed of cultured fish, floating structure, automatic equipments, various facilities, which was expected to play a positive role in leading and promoting the offshore aquaculture industry. In this study, we conducted a series of physical model tests for a semi-submersible offshore fish farm called "Dehai No.1" in waves, in which the model scale was set as 1:30 and the scale of 1:1 was set for the net mesh size . The "Dehai No.1" offshore fish farm with truss structure was co-designed by South China Sea Fisheries Research Institute and Tianjin De-Sai Environmental Protection Technology Co.,Ltd in the year of 2018. The main experimental parameters of the offshore farm were as follows: length 3.04 m, width 0.92 m, height 0.34 m, designed draft of 0.22 m, no-load weight of 15.33 kg. Considering the actual production requirements, three kinds of single point mooring systems (L=2.67, L=5.34 or L=5.34 plus GW=200 g) and three kinds of ballast status (no-load, half-load or full-load) as well as different regular waves conditions (H=16.7-23.3 cm, T=1.64-2.01 s) were set as the test conditions for the fish farm. Through physical model experiments, the dynamic behaviour of the fish farm under different conditions were studied, and the results of mooring force and motion response were given and compared. Owing to the characteristics of the single point mooring system, the fish farm in practice inevitably drift within the scope of sea area in the center of mooring point on seabed with the variation of low-to-high water surface, studying the sway and surge as well as yaw for the fish farm could not testify its good stability. Therefore, we chose the heave, pitch and roll for analyzing the motion characteristics of the fish farm. The experimental results showed that the single-point mooring system with anchor chain length of 5.34 m and a weight of 200 g could better reduce the mooring force of the fish farm in waves. Among all of the wave conditions, the peak value of each movement component of the fish farm was relatively small. When the fish farm was subjected to the sea loads with wave height of 23.3 cm (7 m in full-scale) and wave period of 2.01 s (11 s in full-scale), the peak value for the heave, pitch and roll was 4.21 cm, 6.55° and 1.19°, respectively, which indicated that the fish farm had good performance for the stability of floating state. Comparing the maximum motion and mooring force of the fish farm under various floating conditions, including no-load and half-load as well as full-load, we found that, in the full-load floating state, the peak value for the mooring force, pitch and roll was biggest, but the peak value of the heave was biggest under the no-load floating state for the fish farm. With increasing wave height, both of the mooring force and motion of the fish farm became larger. The results provide a basis for further understanding the dynamic characteristics of fish farm, and help to provide theoretical and data reference for the structure design and installation of fish farm. |
| |
| Keywords: | aquaculture wave kinetics offshore fish farm single-point mooring ballast status |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
| 点击此处可从《农业工程学报》下载免费的PDF全文 |
|
