Analytical Expressions of Capsize Boundary for a Ship with Roll Bias in Beam Waves
Analytical Expressions of Capsize Boundary for a Ship with Roll Bias in Beam Waves
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DOI：
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发表时间：
2002-09
影响因子：
1.4
通讯作者：
K. Spyrou;B. Cotton;B. Gurd
中科院分区：
文献类型：
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作者：
K. Spyrou;B. Cotton;B. Gurd
We have considered Melnikov's method for assessing ship safety against capsize in beam waves when there is some steady heel due, for example, to beam wind loading. For a generic restoring lever parameterized with respect to the degree of lever asymmetry (bias) we have derived closed-form relationships characterizing capsizability and linking the critical wave-slope, the amount of bias, and the damping. Qualitative differences in the safe basin characteristics are identified, which depend on whether the bias is small or large. A critical look into the accuracy of the Melnikov formulas is also presented for nearly symmetric and for strongly asymmetric rolling, based on comparisons with numerical predictions.
