Research on Key Technology in Design of Very Large Ethane Carrier with Type B Tanks
With the rapid expansion of the ethane cracking industry domestically and overseas,very large ethane carriers(VLEC)have become a scarce resource in the global logistics chain.Taking 99 000 m3 VLEC with IMO Type B cargo tanks as the research object,a series of key technologies in its design is identified and analyzed.The selection basis of the containment system of the VLEC cargo is demonstrated,and line shape matching between the liquid cargo tank and the hull line is developed with CFD simulation technology and model tests.The finite element analysis technique is adopted to evaluate the loads and structural strength of the type B tank support system.The coupled effect between the tank sloshing and the hull motion is solved in the frequency domain.Analysis of fatigue crack growth and leakage for the type B tank are completed using the self-developed program.A new IMO Type B cargo containment system called BrilliancE with independent intellectual property rights is developed,whose safety,reliability,and economy have been confirmed in actual operation of the VLEC.
very large ethane carriertype B cargo tankhull linetank sloshingfatigue crack propagationleakage analysis
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