We present a numerical procedure to predict impact-related wave-induced (slamming) loads on ships. The procedure was applied to predict slamming loads on two ships that feature a flared bow with a pronounced bulb, hull shapes typical of modern offshore supply vessels. The procedure used a chain of seakeeping codes. First, a linear Green function panel code computed ship responses in unit amplitude regular waves. Ship speed, wave frequency, and wave heading were systematically varied to cover all possible combinations likely to cause slamming. Regular design waves were selected on the basis of maximum magnitudes of relative normal velocity between ship critical areas and wave, averaged over the critical areas. Second, a nonlinear strip theory seakeeping code determined ship motions under design wave conditions, thereby accounting for the nonlinear pressure distribution up to the wave contour and the frequency dependence of the radiation forces (memory effect). Third, these nonlinearly computed ship motions constituted part of the input for a Reynolds-averaged Navier–Stokes equations code that was used to obtain slamming loads. Favorable comparison with available model test data validated the procedure and demonstrated its capability to predict slamming loads suitable for design of ship structures.
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February 2007
Technical Papers
Numerical Prediction of Impact-Related Wave Loads on Ships
Ould el Moctar
Ould el Moctar
Germanischer Lloyd AG
, Vorsetzen 35, Hamburg 20459, Germany
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Thomas E. Schellin
Ould el Moctar
Germanischer Lloyd AG
, Vorsetzen 35, Hamburg 20459, GermanyJ. Offshore Mech. Arct. Eng. Feb 2007, 129(1): 39-47 (9 pages)
Published Online: November 8, 2006
Article history
Received:
June 26, 2006
Revised:
November 8, 2006
Citation
Schellin, T. E., and Moctar, O. E. (November 8, 2006). "Numerical Prediction of Impact-Related Wave Loads on Ships." ASME. J. Offshore Mech. Arct. Eng. February 2007; 129(1): 39–47. https://doi.org/10.1115/1.2429695
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