A Modified Logvinovich Model For Hydrodynamic Loads on an Asymmetric Wedge Entering Water with a Roll Motion

• Published in: Journal of marine science and application Vol. 10; no. 2; pp. 184 - 189
• Main Authors: Qin, Hongde, Zhao, Linyue, Shen, Jing
• Format: Journal Article
• Language: English
• Published: Heidelberg Harbin Engineering University 01.06.2011
• Subjects: Electrical Machines and Networks; Engineering; Geotechnical Engineering & Applied Earth Sciences; Machinery and Machine Elements; Offshore Engineering; Power Electronics; 修改; 入水问题; 楔形体; 横摇运动; 水动力载荷; 载荷模型; 非对称; 非线性数值方法; water entry; asymmetric wedge; roll motion; modified Logvinovich model(MLM)
• ISSN: 1671-9433; 1993-5048
• DOI: 10.1007/s11804-011-1058-1

The water entry problem of an asymmetric wedge with roll motion was analyzed by the method of a modified Logvinovich model （MLM）. The MLM is a kind of analytical model based on the Wagner method, which linearizes the free surface condition and body boundary condition. The difference is that the MLM applies a nonlinear Bernoulli equation to obtain pressure distribution, which has been proven to be helpful to enhance the accuracy of hydrodynamic loads. The Wagner condition in this paper was generalized to solve the problem of the water entry of a wedge body with rotational velocity. The comparison of wet width between the MLM and a fully nonlinear numerical approach was given, and they agree well with each other. The effect of angular velocity on the hydrodynamic loads of a wedge body was investigated.