摘要
对半潜式平台垂向运动性能(包括垂荡、横摇和纵摇)进行数值计算分析。与模型试验结果的比较表明,对于半潜式平台这类由柱体组成的结构物进行水动力数值预报,忽略粘性力作用会使得低频运动响应计算结果产生偏差,需要应用三维势流理论和Morison公式相结合的方法。横摇和纵摇运动固有频率均低于波浪频率,在波浪慢漂力作用下会出现显著低频运动响应。垂荡运动是否出现低频响应则与所处海况联系紧密。
Numerical analysis is performed on vertical motions of a semi-submersible,including heave,roll and pitch motions.Through comparison with experimental results,it is shown that the viscous drift force should be included when analyzing low-frequency response.Therefore,the method based on 3D potential fluid theory and Morison equations is employed to predict hydrodynamic performance of a semi-submersible.The natural frequencies of pitch and roll motions are lower than wave frequencies.As a result,the low-frequency response will be significant due to the slowly varying wave drift force.For heave motion,whether low-frequency response exists will depend on environment conditions.
出处
《海洋工程》
CSCD
北大核心
2010年第2期1-7,共7页
The Ocean Engineering
基金
国家高技术研究发展计划(863计划)资助项目(2006AA09A103)
关键词
半潜式平台
垂向运动
低频响应
波频响应
Semi-submersible
vertical motions
low-frequency response
wave-frequency response
