Effect of draft and frequency

The draft and frequency effect, a _{d ,} is calculated as follows:

.

I₁: first order modified Bessel function of the first kind
K₁ : first order modified Bessel function of the second kind

k : wave number
w : circular wave frequency

U : ship speed

The above calculation is verified by the experiment¹⁾ as follows.

Fig.3.Results of experiment and calculation

Reference

1) M. Kuroda, M. Tsujimoto, T. Fujiwara, S. Omatsu, and K. Takagi, “Investigation on

Components of Added Resistance in Short Waves (in Japanese)”, Conference Proceedings

of The Japan Society of Naval Architects and Ocean Engineers, Vol.6, pp.23-26, 2008

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