Analysis of liquid sloshing in LNG carrier with wedge-shaped tanks

作者：Zhang Chongwei^*

来源：Ocean Engineering, 2015, 105: 304-317.

DOI：10.1016/j.oceaneng.2015.06.044

• Sloshing
• Non-wall-sided tanks
• Boundary element method
• Natural frequencies
• Free surface waves

The LNG carrier with four wedge-shaped tanks is introduced. This design aims to avoid the simultaneous occurrence of the sloshing resonance in all tanks that endangers the ship stability. A numerical strategy with the help of the boundary element method is developed to calculate the natural sloshing frequencies and corresponding modes for these wedge-shaped tanks. The effects of the inclined tank walls on the natural sloshing frequencies/modes are identified. The elevation histories of the sloshing waves in these tanks are further studied, when the carrier is-excited by sway, roll, surge or pitch motions at the fundamental natural frequency of each tank. The effectivity of this new design is confirmed from the results.

• 出版日期2015-9-1