﻿ 大型漂浮装置非线性横摇特性研究
 舰船科学技术  2018, Vol. 40 Issue (4): 63-67 PDF

Research on the nonlinear rolling characteristics of a large floating facility
LIU Zhou-yang, LIU Yong, LIN Yuan-sheng, ZHANG Ke-long
Wuhan Second Ship Design and Research Institute, Wuhan 430205, China
Abstract: The paper adopted a large floating facility as the rolling test platform of shipborne systems and equipments. By fouding and analyzing the nonlinear rolling motion model with nonlinear damping, restoring and driving moment, the paper obtained the nonlinear rolling characteristics of the facility in a wide range of the amplitude and the cycle, and the characteristics of driving power. The results showed that stroke time differences existed between the acceleration and deceleration stroke, the increase of amplitude and the decrease of cycle both led to the increase of the damping and driving power, while the increase of meta-centric height led to the decrease of the driving power. The study would provide some instructions for the operation of floating facility and the shipborne equipments tests.
Key words: floating facility     nonlinear rolling     amplitude     damping power     driving power
0 引　言

1 漂浮试验装置 1.1 漂浮装置

 图 1 漂浮装置横摇运动示意图 Fig. 1 The rolling motion of floating facility
1.2 运行模式

2 分析模型 2.1 系统横摇运动模型

 $\ddot \varphi + \left( { - \upsilon \dot \varphi \pm {\beta _2}{{\dot \varphi }^2}} \right) \pm \left( {{c_1}\varphi + {c_3}{\varphi ^3}} \right) + {m_t} = 0\text{，}$ (1)

2.2 系统分析步骤

 图 2 系统分析步骤 Fig. 2 The system analysis process
3 结果与讨论 3.1 有、无附体平台的衰减横摇运动

 图 3 自由横摇时历曲线（φ0=π/6） Fig. 3 Time history curve of free-decay rolling (φ0=π/6)

 图 4 自由横摇行程时间（φ0=π/6） Fig. 4 Stroke time of free-decay rolling (φ0=π/6)

 图 5 阻尼力矩与恢复力矩的周期峰值之比 Fig. 5 Ratio of cycle peak value of damping and restoring moment

 图 6 自由横摇无量纲阻尼功率 Fig. 6 Dimensionless damping power of free-decay rolling
3.2 等周期稳态横摇

 图 7 横摇阻尼功率时历曲线 Fig. 7 Dimensionless rolling damping power time history

 图 8 不同横摇幅角的横摇阻尼功率 Fig. 8 Dimensionless rolling damping power of different amplitudes
3.3 等幅角稳态横摇

 图 9 不同周期的等幅角横摇时历曲线 Fig. 9 Rolling motion time history of different cycles

 图 10 不同横摇周期的横摇阻尼功率 Fig. 10 Dimensionless rolling damping power of different cycles

 图 11 不同横摇周期的横摇驱动功率 Fig. 11 Dimensionless rolling driving power of different cycles

 图 12 角度、功率的时历曲线（h0，T10A工况） Fig. 12 Time history curve of rolling angle and nondimensionless power (h0，T10A)
3.4 横摇的起动与停止

 图 13 起动曲线与停止曲线 Fig. 13 The start and stop curve
4 结　语

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