Ice-Resistance - Jones / Kashteljan
Ice-resistance estimate for a merchant ship in level ice using Jones 2005 / Kashteljan formula - the go-to screening method in ice-class design.
Ice resistance
146kN
Formula, assumptions, and limits
$$R_{ice} \approx c_1 B h^2 + c_2 B h V$$
Kashteljan coefficients 800, 25 for merchant hulls at low Fn. Jones 2005 refines with bow shape and friction coefficient $μ_{\text{ih}}$. Ice-breakers have lower $c_2$ due to ramming strategy.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $B$ | Beam at waterline | m | ship particulars |
| $h$ | Level ice thickness | m | ice chart |
| $V$ | Ship speed | m/s | operation |
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