<p>This paper elaborates the impact characteristics of double-hull side structures in various ship types including an oil tanker, a bulk carrier, a container ship and a LNG carrier. Their own structural configurations, such as the strengthened topside tank in the container ship, affect the crashworthiness of double-hull structures in ship collisions. Two striking bows are modeled so as to evaluate the crashworthiness of the double-sided structures. The calculations are performed using LS-DYNA version 971 to access the impact characteristics of four struck ships. The ship collision analysis discusses the assumption of rigid bow in conventional analysis and its effect on the evaluation of side structural resistance. In the paper, the numerical force-displacement responses and absorbed energy-displacement curves of various ships are comparison. The comparison aims to reveal the discrepancy of the crashworthiness of four typical double-hull structures. The damage of double sides is separated into two parts, a lower damage caused by the protruding bulb at the bow and an upper damage caused by the top of the bow above the bulb. The bow and side deformation interaction, affected by the distance between the bulb tip and the foremost part of the bow, is discussed. It is of importance to analyze their structural characteristics for the design of crashworthy structures.</p>

Ship Collision Analysis of Double Hull Structures in Various Ship Types

Paper Proceedings: https://asmedigitalcollection.asme.org/OMAE/OMAE2021/volume/85116

OMAE 2021

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