A.N.Serdjuchenko Nonlinear mechanism of excitation of hydroelastic vibration in moderate sea conditions |
Applied hydromechanics, Vol. 6 (78) ¹ 1, (2004) |
| Key aspects of the approximate nonlinear method for the estimation of wave-induced vertical ship-hull vibration in moderate sea conditions are presented. This technique includes the simplified nonlinear solution of the hydrodynamic part of the diffraction problem for head seas and specified approach in the nonlinear estimation of the RMS-values of wave-induced stresses in the middle ship-hull section. Numerical results for hydrodynamic loads in moderate regular waves and for RMS-values of wave-induced stresses in irregular waves are presented as well the comparison of the data obtained with the independent results of model and full-scale measurements has been done. The reliable correlation of the results has been obtained. Systematic numerical calculations of RMS-values of wave-induced stresses for typical flexible ships displayed strong influence of the nonlinear effects on the values of RMS. |
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| TEXT LANGUAGE: Ukrainian |