Experimental Investigation on Temporal and Spatial Distribution of Bow Flare Slamming in Waves
This paper investigates the temporal and spatial distribution of slamming pressure on the bow flare of an ultra-large container ship through model tests.Four types of impact pressure on the bow flare in waves are summarized based on the severity of the impact and the interaction modes between the ship and the waves.Characteristics of the temporal and spatial distribution of slamming pressure on the bow flare under typical conditions are examined.Based on the momentum theory,a simplified method of slamming pressure on the bow flare is developed.Uncertainty of slamming pressure in regular waves is analyzed,which reveals four distinct types of bow flare slamming.The peak slamming pressure varies significantly at different places.The maximum slamming pressure is near the upper left and right sides of the stem,reaching up to 4.11 kPa.The horizontal movement speed of the slamming is significantly greater than its vertical movement speed.The entire slamming process of bow flare lasts 0.15 seconds approximately.The average duration of the increase in slamming pressure at each measurement point is approximately 0.01 seconds,while the average duration of the decrease is about 0.05 seconds.The ratio of the uncertainty of the slamming pressure to its mean value varies between 6％and 18％approximately under different confidence levels.
bow flareslamming pressuretemporal and spatial distributionmodel testuncertainty
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