圆筒型FPDSO对环境载荷方向不敏感，但其垂荡运动性能相对较差，造成运动响应难以控制的问题。为此，提出由减动结构与延伸筒体组合的运动抑制系统，加装在圆筒型FDPSO上增大运动阻尼，以实现抑制垂荡运动幅值的功能。通过1∶77.8的缩尺模型开展自由衰减试验，采用无接触式六自由度运动测量仪测量试验模型的垂荡、纵摇自由衰减运动，测试不同减动结构对圆筒型FPDSO阻尼性能以及运动固有周期的影响。试验结果表明，减动结构与延伸筒体间隙以及减动结构外伸边锋对于阻尼性能影响显著，增大减动结构的外伸可以有效增大结构的阻尼，加大间隙也可以增大阻尼。
The cylindrical FDPSO is non-sensitive to the direction of environmental load, but its heave motion is relative poor, so that the motion responses are too hard to be controlled. To overcome this problem, anti-motion structure, which is a combination of motion-reduction structure and extensional body, is proposed to add on the cylindrical FDPSO, in order to restrain the large heave amplitude. According to the free-decay tests with a 1∶77.8 scaled model, the heave and pitch free decay motions are documented by the non-contacted 6D motion measuring device. The effect of different motion-reduction structure on the damping and natural periods of cylindrical FDPSO is tested. The experimental results show that the gap between the motion-reduction structure and extensional body, as well as the extensional edge on the motion-reduction structure, has significant influence on the heave and pitch damping. Specifically, the damping could be effectively increased by the larger gap and the longer extensional edge.
2022,44(20): 92-96 收稿日期：2022-01-06
DOI：10.3404/j.issn.1672-7649.2022.20.018
分类号：U661
作者简介：袁洪涛(1979-)，男，博士，高级工程师，研究方向为船舶与海洋工程结构总体
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