Sustainable Marine Structures

Analysis of Wave Added Drag and Motion Response of Mid-highspeed Ship against Waves

Jing Wang

China Institute of Marine Technology and Economy, Beijing, 100081, China

Yu Zhou

Jiangsu Shipping College, Nantong, Jiangsu, 226010, China

DOI: https://doi.org/10.36956/sms.v5i1.804

Received: 7 January 2023; Revised: 3 February 2023; Accepted: 27 February 2023; Published: 1 March 2023

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Abstract

In order to accurately predict the on-wave resistance and responses to hull motions of ships in actual sea conditions, the k-ε method of the RNG model is adopted on the basis of the unsteady RANS method. The twoformula turbulence model deals with the viscous flow, the VOF method captures the free surface, the velocity boundary method makes waves, the artificial damping method is used to eliminate waves, and the nested grid technology is used to deal with the motion response of ships on waves. Combined with the 6-DOF motion formula, a three-dimensional numerical wave cell for regular waves is established. For one example, taking a KCS Container ship and fishing boat sailing at a mid-high-speed, the increase of wave resistance and motion response at different wavelengths are analyzed, and the simulation results are compared with the experimental value, the content of strip theory in potential flow theory and the panel method to prove the reliability of CFD method in predicting ship motion.

Keywords: CFD method; Wave added resistance; Motion response; Numerical pool; Numerical simulation

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