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Analysis of Hydrodynamics Interactions and Motion Response between the Bargeand FPSO

Author: ChenMingMing
Tutor: WangZhiDong
School: Jiangsu University of Science and Technology
Course: Fluid Mechanics
Keywords: planning boat hydrodynamic characteristics two-phases fluid air load wave load slamming load
CLC: U661.1
Type: Master's thesis
Year: 2012
Downloads: 23
Quote: 0
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Abstract


The application of computational fluid dynamics (CFD) has been the subject of increasing attention in the ship and ocean engineering. Some techniques have been developed and practically used. However, because of the complexity of movement and the high speed of planning boat, the CFD techniques have not met the demands of practical use. It is of great significance to systematically study the hydrodynamic characteristics of planning boat with modern numerical techniques. The aim of this paper is research about the hydrodynamic characteristics of planning craft consider the air and wave.In this paper, firstly, a review of the state of the art and the tendency for future advances in the field of study of hydrodynamic characteristics of planning craft was presented. Then the mathematical model was developed for the description of hydrodynamic characteristics of planning craft near the ground. Finally, a series of calculation and analysis were performed by numerical approach. They are as follows:1) Numerical simulation of viscous fluid flow around a2D planning panel was performed through the solution of RANS equations for the validation of mathematical and numerical model. Discuss about the drag coefficient, lift coefficient and the position of the pressure. The lift coefficient compare with the SIT method, as well as the Shuford method. Empirical formula used for comparative analysis with the drag coefficient.2) A two-dimensional hydrodynamic characteristics of planning hulls Numerical Calculation was performed. Achieved the angle of attack of the5°,10°15°planning boat on the fluid of the aerodynamic loads impact. Obtained that the impact of the air load increases with the Froude number increases, especially to momentum of the angle10°3) Used of push-plate method simulate the regular wave generation process. Numerical simulated the jet, roll and the break of the wave. Gives the wave parameters and discuss the influence to the planning boat. Described the sliding boat non-linear movement in wave.4) Simplify the planning hull to two-dimensional wedge-shaped Structure. Study the water slamming in constant velocity. Analysis the relevant parameters through the free surface changes. And knows that the location of peak pressure is in the spray zone around the roots. Wedge-shaped body slamming into the water when t he pressure coefficient increases with the angle decreases, and vary with velocity.

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship hydrodynamics
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