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首页> 外文会议>International Conference on Offshore Mechanics and Arctic Engineering, Jun 23-28, 2002, Oslo, Norway >THE HEAVE RESPONSE OF A CENTRAL SPAR FISH CAGE
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THE HEAVE RESPONSE OF A CENTRAL SPAR FISH CAGE

机译：中央SPAR鱼笼的响应。

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摘要

As the aquaculture industry considers moving into the open ocean, understanding the dynamic response of fish containment structures becomes critical. Identification of possible resonant conditions and motion characteristics is necessary for system structural integrity and maximizing fish survivability. In this study, heave (vertical motion) free release tests of a central spar fish cage were conducted using a combination of physical and finite element models and field observations. These tests were performed to investigate the added mass, damping ratio and natural period of the system in the vertical direction. The test results were analyzed considering both linear and nonlinear damping. The comparison of these tests show that (1) the damped natural period of this fish cage is longer than 20 seconds, (2) the numerical model underestimates the damping and the cage oscillates longer and at a higher frequency than observed with the field tests and (3) the physical model is nearly critically damped near equilibrium due to Reynolds number effects at the model scale.
机译：随着水产养殖业考虑进入公海，了解鱼类围护结构的动态响应变得至关重要。识别可能的共振条件和运动特性对于系统结构的完整性和最大限度地提高鱼类的生存能力是必不可少的。在这项研究中，结合了物理和有限元模型以及野外观察，对中央晶石鱼笼进行了升沉（垂直运动）释放试验。进行这些测试是为了研究垂直方向上系统的附加质量，阻尼比和自然周期。分析了考虑线性和非线性阻尼的测试结果。这些测试的比较表明：（1）该鱼笼的阻尼自然周期长于20秒，（2）数值模型低估了阻尼，并且该笼振荡的频率和频率高于现场测试所观察到的频率，以及（3）由于模型规模的雷诺数效应，物理模型在平衡附近几乎被临界阻尼。

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