在二维(2D)中自由落水的圆柱形物体的无量纲分析

IF 0.7 Q4 ENGINEERING, OCEAN

Ocean Systems Engineering-An International Journal Pub Date : 2020-09-01 DOI:10.12989/OSE.2020.10.3.267

Yi Zhen, Xiaochuan Yu, Haozhan Meng, Linxiong Li

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引用次数: 0

摘要

在石油和天然气行业，掉落的物体被认为是造成死亡和重伤的十大原因之一。了解水下落物动力学对于准确预测落物运动，保护水下结构和设施不受破坏具有重要意义。在本文中，我们研究了二维(2D)理论的无量纲化问题。无量纲化有助于减少自由参数的数量，确定力和力矩影响的相对大小，并更深入地了解水中圆柱形物体的动力学本质。无因次轨迹仿真结果表明，落角、尾缘和阻力系数对水下圆柱形物体的轨迹动力学和着陆位置有显著影响。

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Non-dimensional analysis of cylindrical objects freely dropped into water in two dimensions (2D)

The dropped objects are identified as one of the top ten causes of fatalities and serious injuries in the oil and gas industry. It is of importance to understand dynamics of dropped objects under water to accurately predict the motion of dropped objects and protect the underwater structures and facilities from being damaged. In this paper, we study non-dimensionalization of two-dimensional (2D) theory for dropped cylindrical objects. Non-dimensionalization helps to reduce the number of free parameters, identify the relative size of effects of force and moments, and gain a deeper insight of the essential nature of dynamics of dropped cylindrical objects under water. The resulting simulations of dimensionless trajectory confirms that drop angle, trailing edge and drag coefficient have the significant effects on dynamics of trajectories and landing location of dropped cylindrical objects under water.

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来源期刊

Ocean Systems Engineering-An International Journal ENGINEERING, OCEAN-

自引率

22.20%

发文量

期刊介绍： The OCEAN SYSTEMS ENGINEERING focuses on the new research and development efforts to advance the understanding of sciences and technologies in ocean systems engineering. The main subject of the journal is the multi-disciplinary engineering of ocean systems. Areas covered by the journal include; * Undersea technologies: AUVs, submersible robot, manned/unmanned submersibles, remotely operated underwater vehicle, sensors, instrumentation, measurement, and ocean observing systems; * Ocean systems technologies: ocean structures and structural systems, design and production, ocean process and plant, fatigue, fracture, reliability and risk analysis, dynamics of ocean structure system, probabilistic dynamics analysis, fluid-structure interaction, ship motion and mooring system, and port engineering; * Ocean hydrodynamics and ocean renewable energy, wave mechanics, buoyancy and stability, sloshing, slamming, and seakeeping; * Multi-physics based engineering analysis, design and testing: underwater explosions and their effects on ocean vehicle systems, equipments, and surface ships, survivability and vulnerability, shock, impact and vibration; * Modeling and simulations; * Underwater acoustics technologies.