摘要
Spar平台带有厚度很薄的垂荡板,使用边界元方法计算时存在着准奇异积分的数值计算问题。采用自适应高斯积分法对其准奇异积分问题进行处理,较少单元即可达到很高精度。在势流理论下对Spar平台垂荡板的水动力系数进行了计算,并与实验结果进行了对比,发现真实流体中垂荡板的附加质量约为势流理论下附加质量计算结果的1.1倍,而辐射阻尼在总阻尼中所占的百分比很小,此时粘性阻尼成为垂荡板的主要阻尼来源,在工程设计中不可忽略。
For the existence of thin heave-plates of Spar platform,nearly singular integration will come out while using boundary element method.Therefore,a self-adaptive Gauss integration method is adopted,and higher precision results are obtained with fewer elements.Hydrodynamic coefficients of heave-plates of Spar platform are evaluated in the frame of potential theory and results are compared with experimental data.The added mass of thin plates in real-life fluid is about 1.1 times of the potential results.In contrast to the small radiation damping of heave-plates,viscous damping is the major part of total damping which should be taken into account for practical engineering.
出处
《海洋工程》
CSCD
北大核心
2010年第3期1-8,共8页
The Ocean Engineering
基金
国家自然科学基金资助项目(50639030
10772040)
国家重大专项资助课题(2008ZX05026-02-02)
关键词
垂荡板
边界元方法
水动力系数
准奇异积分
SPAR平台
heave-plates
boundary element method
hydrodynamic coefficients
nearly singular integrals
Spar platform
