船舶横摇二维辐射问题的二阶解及其试验研究  

SECOND-ORDER SOLUTION FOR 2-D RADIANT PROBLEM OF SHIP ROLL MOTION

作　　者：周其斗[1] 彭英声[1] 徐德嘉[1] 

机构地区：[1]海军工程学院

出　　处：《中国造船》1990年第1期15-22,共8页Shipbuilding of China

摘　　要：本文从势流理论出发,以摄动理论为基础,用密切拟合法求解了二维船体割面在水面上作横摇运动的速度势及其水动力。在求解过程中,采用了对一阶速度势直接求导的方法,这比用数值求导的方法更为准确、合理。为检验理论计算结果及其适用性,本文还进行了实验研究,分析了实测波高的各阶成分,发现在理论所适用的低频小角度情况下,理论计算与试验结果比较一致,而在高频大幅度横摇时,三阶波高大于二阶波高。 本文给出了057模型、Lewis型、和圆形剖面的理论计算结果和057模型的试验结果。On the basis of perturbational theory, this paper deals with the po tential and hydrodynamic force of forced roll motion of a 2-D ship-like body in the free surface by use of close fitting method. In the course of solving second-order problem, a direct-derivation method on the firstorder potential is proposed. This method is more accurate and rational than numerical derivation. To examine the results of theoretical calculation, an experimental equipment was set up and the wave-making was measured. It is shown that in the case of small roll angle and low frequency the theoretical results are in good agreement with the measured ones; in the case of high frequency and large roll angle third-order wave height is larger than second-order one.The paper also gives the theoretical results, for the cross section of 057 model and Lewis form, and the experimental results carried out for the 057 model.

关 键 词：船舶 横摇运动 二维辐射 二阶解 势流理论 密切拟合法 非线性运动 

分 类 号：U661.321[交通运输工程—船舶及航道工程]