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Smoothed-Particle Hydrodynamics Simulation of Ship Motion and tank sloshing under the Effect of Regular Waves

Fluid Dynamics & Materials Processing 2024年第5期20卷 1045-1061页

作者： Mingming Zhao Jialong Jiao School of Civil Engineering and Transportation South China University of TechnologyGuangzhou510641China

Predicting the response of liquefied natural gas(LNG)contained in vessels subjected to external waves is extremely important to ensure the safety of the transportation *** this study,the coupled behavior due to ship motion and liquid tank sloshing has been simulated by the Smoothed-Particle Hydrodynamics(SPH)***,the sloshing flow in a rectangular tank was simulated and the related loads were analyzed to verify and validate the accuracy of the present SPH ***,a three-dimensional simplified LNG carrier model,including two prismatic liquid tanks and a wave tank,was *** conditions were examined corresponding to different wave lengths,wave heights,wave heading angles,and tank loading ***,the effects of liquid tank loading rate on LNG ship motions and sloshing loading were analyzed,thereby showing that the SPH method can effectively provide useful indications for the design of liquid cargo ships.

关键词： LNG carrier tank sloshing seakeeping inner and external fluid coupling Smoothed Particle Hydrodynamics(SPH)

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Optimization of the roll motion of box-shaped hull section with anti-rolling sloshing tanks and fins in beam waves

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Journal of Hydrodynamics 2021年第4期33卷 688-697页

作者： Xin-wang Liu Wei-wen Zhao De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Ocean College Zhejiang UniversityZhoushan316021China

With the development of ocean engineering and demand for safety of the ship and offshore structures, the transportation and storage of liquid have become an important issue nowadays. Furthermore, in order to improve the hydrodynamic performances of the ship and offshore structures, the anti-rolling liquid tanks are often taken into consideration. The internal-external coupling flow effect is vital for the ship and liquid tank designs, especially when the external wave frequency is close to the natural frequency of liquid tanks with a certain filling ratio, large amplitude motions may occur, which is dangerous to some extent. In this paper, the simulation-based-design method is introduced at first, and the verification of the numerical calculation of internal-external coupling flow with liquid tanks is done then. Finally, the filling ratio of the anti-rolling liquid tank and the installation angle of the anti-rolling fins are optimized to reduce the roll motion amplitude of the hull section to the greatest extent under the combined action of the two anti-rolling devices. Optimization results show that the roll motion amplitude of box-shaped hull section can be successfully reduced by reasonably designing the two anti-rolling devices, which can be a reference to the future design of the fishing ship and other ships with anti-rolling devices.

关键词： tank sloshing anti-rolling fin ship motion in waves ship hydrodynamic optimization

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An Approximation to Energy Dissipation in Time Domain Simulation of sloshing Waves Based on Linear Potential Theory

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China Ocean Engineering 2011年第2期25卷 189-200页

作者：黄硕段文洋马庆位 College of Shipbuilding Engineering Harbin Engineering University School of Engineering and Mathematical Sciences

This paper proposes a new approximation to energy dissipation in time domain simulation of sloshing waves by use of a linear potential theory. The boundary value problem is solved by the NURBS （non-uniform rational B-spline） higher-order panel method, in which a time-domain Green function is employed. The energy dissipation is modeled by changing the boundary condition on solid boundaries. Model experiments are carried out in a partially filled rectangular tank with forced horizontal motion. sloshing-induced internal pressures and horizontal force obtained numerically and experimentally are compared with each other. It is observed that the present energy dissipation approximation can help produce a fair agreement between experimental forces and those of numerical simulations.

关键词： tank sloshing energy dissipation NURBS higher-order method time domain

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