摘要
研究了深海桁架式Spar平台垂荡板的水动力性能.首先考虑了不同振幅和板间距对水动力的影响,其次对不同厚度的板进行了计算分析,并且考虑了将板四周进行消斜的情况.通过Fluent中的用户自定义函数,利用动网格技术对垂荡板的受迫振荡运动进行数值模拟,计算得出垂荡板的附加质量系数和阻尼力系数.结果表明:在一定的幅值范围内,附加质量系数随着运动幅值的增大而增大,阻尼力系数随着运动幅值的增大而减小;附加质量系数和阻尼力系数都随着板间距的增大而增大,并逐渐趋于平稳;同时发现有效厚度相同时,经削斜后板的水动力性能得到很大改善.
The hydrodynamic characteristics of heave plates for Truss Spar were studied.Firstly,influences of differ-ent motion amplitudes and plate spacing on hydrodynamic coefficients were considered.Secondly,heave plates with different thicknesses were calculated,and the case of heave plate being tapered was also taken into account.Numeri-cal simulations were made for the plate forced oscillation,employing the dynamic mesh method and user defined functions in Fluent,and there by the added mass coefficient Cm and the damping coefficient Cd of heave plate were calculated.The results show that,in a certain amplitude range,Cm increases with increasing amplitude and Cd de-creases with increasing amplitude.The values of Cm and Cd increase with increasing plate spacing,and the trend tends to be steady.Furthermore,with the same effective thickness,the hydrodynamic performance of the heave plate after being tapered is improved greatly.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2011年第6期491-496,共6页
Journal of Tianjin University(Science and Technology)
基金
国家高技术研究发展计划(863计划)资助项目(2007AA09Z304)
国家自然科学基金资助项目(50879057)
关键词
垂荡板
水动力系数
自定义函数
动网格
削斜
heave plate
hydrodynamic coefficient
user defined funtions
dynamic mesh
taper
