Research on the motion characteristics of emergency rescue boat entering water in wave environment

DOI:	10.11809/bqzbgcxb2024.04.017
Keywords:	numerical pool; bang into the water; numerical simulation; motion response
Abstract:	Based on the fifth order Stokes wave theory, a three dimensional numerical wave pool with good effect is established by using velocity inlet wave generation method and damping wave elimination method. The influence of wave parameters on the process of rescue boat entering the water is studied. The results show that: when rescue boat enters the water vertically, the relative wave orientation has a great influence on the impact load, and the impact load perpendicular to the phase of the wave entering the water is smaller than that of the static water. In all phases parallel to the wave entering the water, the slamming load at the trough position is smaller than that at the static water surface, and the slamming load at the equilibrium position (descending velocity) is the largest, about 1.375 times of that at the static water surface. With the increase of the level of the sea state, the wave disturbance to the rescue boat entering the water is intensified, and the slamming load increases. Compared with the wave propagation direction, the phase of entry has a greater impact on the slamming load of the rescue boat when the rescue boat enters the wave water with the horizontal speed and inclined attitude. With the increase of the sea state grade, the slamming load of the rescue boat in all directions increases, and the variation amplitude of pitch Angle in the process of entering the water decreases gradually.
Published:	2024-04-30
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