Abstract:
The height of the mooring point significantly affects the platform's hydrodynamic characteristics and structural stress, thereby impacting its stability. This study uses ANSYS to investigate the hydrodynamic and structural stress features of a semi - submersible aquaculture platform under different mooring point heights. The results indicate that higher mooring points lead to greater platform motion responses, especially in terms of increased tilt angles, which negatively affect platform operation and stability under extreme sea conditions. The lowest mooring point (P1) experiences higher mooring forces and stress but remains within acceptable limits, with the smallest motion response, making it favorable for platform operation and recommended as the ideal mooring point. Further analysis was conducted on the impact of different wave periods and load directions on platform motion and stress. When only subjected to wave action, the mooring force and stress show low sensitivity to the wave period, while horizontal displacement and heave increase with the wave period. Under combined wave - current action, the trends are opposite to those observed under pure wave action. The mooring force is maximized and platform displacement minimized when the load direction is 0°, while at load directions of 15° and 30°, two mooring chains share the load, resulting in reduced mooring forces, heave, and stress, while horizontal displacement increases. The findings provide valuable insights for the design and optimization of mooring heights for semi - submersible aquaculture platforms.
Key words:
semi-submersible platforms,
mooring points,
combined wave and current action,
mooring force,
structural stress
摘要： 系泊点高度的不同会显著影响平台的水动力特性和结构应力，从而影响平台的稳定性。采用ANSYS研究了半潜式养殖平台在不同系泊点高度下的水动力和结构应力特征。结果表明，系泊点越高，平台运动响应越大，尤其是倾斜角度增大，对平台运维及极端海况下的稳定性不利。最低系泊点P1的锚泊力和应力较大，但未超过限制值，且运动响应最小，有利于平台运营，被推荐为理想系泊点。进一步研究了不同波浪周期和荷载方向对平台运动与受力的影响。仅波浪作用时，锚泊力与应力对波浪周期敏感性低，线位移和纵摇与波浪周期呈正相关关系。波流联合作用时变化趋势与纯浪作用相反。荷载方向0°时锚泊力最大，平台线位移最小。荷载方向15°和30°时，有两根锚链共同承力，锚泊力、纵摇和应力减小，线位移增大。研究结果可为半潜式养殖平台系泊高度的设计和优化提供依据。
关键词:
半潜式平台,
系泊点,
浪流联合作用,
锚泊力,
结构应力
ZHANG Yanfang1, ZHENG Zhenjun2, MEI Huadong1, HU Xingtao1, WANG Yanxin1, TANG Mingfu3, YANG Chuandong2. Impact of mooring point height on the hydrodynamic performance and structural stress of a semi-submersible aquaculture platform#br#
#br#
[J]. Fishery Modernization, 2025, 52(3): 12-.
张艳芳[], 郑振钧 2, 梅华东1, 胡性涛1, 王衍鑫1, 唐鸣夫3, 杨传东 2. 系泊点高度对半潜式养殖平台水动力和结构应力的影响[J]. 渔业现代化, 2025, 52(3): 12-.