摘要
板翼动力锚是依靠自重完成安装并靠自重和海床土的抗力来锚固的新型动力锚。板翼动力锚在水中自由下落的阻力决定了锚到达海床表面时的速度,进而直接决定了锚贯入海床中的深度以及它能提供的承载力。板翼动力锚的形状比较复杂,采用计算流体动力学的方法研究板翼动力锚的下落速度、水平位移和转角与下落位移的关系。计算结果表明:板翼动力锚的拖曳阻力系数约为0.93~1.12之间;在沉贯过程中应使加载臂与翼板共面以减少阻力;板翼动力锚的终端速度约为28 m/s。
Gravity installed plate anchors are newly developed dynamic anchors installed through self-weight. The drag inertial force during free fall in water mainly influences the impacting velocity of anchor at the seabed surface, which further determines the embedment depth and uplift resistance of anchor. Due to the complex shape of the gravity installed plate anchor, computational fluid dynamics method was employed to investigate the relationships between drop velocity, horizontal displacement, rotation angle and drop displacement. The numerical results indicate that the drag coefficient of the anchor are ranged 0.93- 1.12. To reduce the drag force it is better to keep the loading arm in-line with the fins during free fall. The terminal velocity of the anchor during free fall in water is about 28 m/s.
出处
《海洋工程》
CSCD
北大核心
2017年第3期29-36,共8页
The Ocean Engineering
基金
国家自然科学基金项目(51479027
51539008)
