Original scientific paper
https://doi.org/10.21278/brod75305
Study on numerical simulation and mitigation of parametric rolling in a container ship under head waves
Liu Liang
; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China
Zhang Baoji
; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China
*
Zhang Hao
; Merchant Marine College, Shanghai Maritime University, Shanghai, 201306, China
Gong Jiaye
; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China
Tian Zheng
; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China
Guo Shuhui
; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China
Bao Yuanbiao
; Merchant Marine College, Shanghai Maritime University, Shanghai, 201306, China
Zheng Xu
; Merchant Marine College, Shanghai Maritime University, Shanghai, 201306, China
* Corresponding author.
Abstract
To investigate the parametric rolling motion of container ships navigating in head seas, this study utilizes the unsteady RANS approach combined with dynamic overlapping grid technology to simulate parametric roll in a container ship under the coupled motions of roll, pitch, and heave. Initially, the model was validated against experimental results, demonstrating good agreement and thus confirming the reliability of the computational method. Furthermore, the paper investigates the impacts of the initial roll angle, encounter frequency, and the addition of bilge keels on parametric rolling. The research findings indicate that the initial angles of rolling impact the duration needed to attain a steady roll condition, yet they have minimal effect on the amplitude post-stabilization. The likelihood of parametric rolling arises when the frequency of encounters doubles that of the ship’s inherent roll frequency. Furthermore, the likelihood of parametric rolling escalates when the wavelengths approach the length of the ship. Installing bilge keels markedly reduces the parametric rolling movement in vessels, and the occurrence of parametric rolling is also delayed.
Keywords
Parametric rolling; CFD; head wave; container ship; dynamic overset
Hrčak ID:
319375
URI
Publication date:
1.7.2024.
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