International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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On the mitigation of surf-riding by adjusting center of buoyancy in design stage

  • Yu, Liwei (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Ma, Ning (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Gu, Xiechong (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University)
  • Received : 2016.03.11
  • Accepted : 2016.10.23
  • Published : 2017.05.31
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Abstract

High-speed vessels are prone to the surf-riding in adverse quartering seas. The possibility of mitigating the surf-riding of the ITTC A2 fishing vessel in the design stage is investigated using the 6-DOF weakly non-linear model developed for surf-riding simulations in quartering seas. The longitudinal position of the ship's center of buoyancy (LCB) is chosen as the design parameter. The adjusting of LCB is achieved by changing frame area curves, and hull surfaces are reconstructed accordingly using the Radial Basis Function (RBF). Surf-riding motions in regular following seas for cases with different LCBs and Froude numbers are simulated using the numerical model. Results show that the surf-riding cannot be prevented by the adjusting of LCB. However, it occurs with a higher threshold speed when ship's center of buoyancy (COB) is moved towards stem compared to moving towards stern, which is mainly due to the differences on wave resistance caused by the adjusting of LCB.

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