摘要
为研究某水面舰船在一定风载荷作用下的操纵性特点,基于Matlab软件平台和模型试验,构建了静水和考虑风载荷作用下的三自由度MMG操纵性方程,对静水和风载荷作用下的操纵性进行数值预报。通过静水中数值预报结果与试验值的比较,发现仿真值与试验值吻合度较好,从而验证了该方法的可行性。将风载荷作用下的结果与静水中的数值预报结果进行对比分析,结果表明,无因次回转直径、无因次战术直径、速降、无因次横距等回转运动参数都要小于静水中预报值,回转角速度基本与静水预报值一致,无因次纵距要大于静水中的理论预报值;初转周期、超越时间、第一超越角以及第二超越角等Z形运动参数值都要大于静水中预报值,由此可知风载荷对该水面舰船的操纵性相较于静水具有明显的影响,同时该数值预报方法可为工程应用提供借鉴。
In order to study the maneuverability of a surface ship under the certain wind load,the three-degree-of-freedom MMG maneuverability equation under still water and wind load is constructed based on the Matlab software platform.It is found that the simulation value is in good agreement with the test value by comparing the results of the numerical forecast in the still water with the test value,which proves the feasibility of the method.The numerical calculation of the maneuverability under wind load is carried out and compared with the numerical results of still water.The results show that:The rotational angular parameters such as the dimensionless rotation diameter,the dimensionless tactical diameter,the velocity drop,the dimensionless transverse distance are smaller than the theoretical forecast value in the hydrostatic,and the rotational angular velocity is basically the same as the theoretical value of the hydrostatic theory,and the dimensionless longitudinal distance are greater than the theoretical forecast value in the hydrostatic.And the Z-shaped motion parameters such as the initial prediction period,the transcendental time,the first transcendental angle and the second transcendental angle are larger than those of the hydrostatic theoretical forecast value.It can be seen that the wind load has a maneuverability influence to the surface ship when compared with still water,and the numerical forecasting method can provide reference for engineering application.
作者
魏可可
高霄鹏
WEI Ke-ke;GAO Xiao-peng(Department of Naval Architecture,Naval University of Engineering,Wuhan 430033,China)
出处
《舰船科学技术》
北大核心
2019年第15期48-54,共7页
Ship Science and Technology
