#TITLE_ALTERNATIVE#

• Main Author: (NIM : 30101022), MARWAN
• Format: Dissertations
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/14303
• Institution: Institut Teknologi Bandung

Abstract: <br /> <br /> <br /> <br /> <br /> <br /> <br /> Performance of floating bodies such as ships and ocean structures have to be known before going into operation. For this purpose a scaled model is made. The model is then confronted against the most hazardous condition in a wave tank of a hydrodynamic laboratory. One such conditions is against extreme waves. Therefore, ability to generate steep and large amplitude wave fields, which are often called as extreme waves, is an urgent necessity. By studying related mathematical models, solving them and investigating applications of the models, the time input signal that should be prescribed at the wavemaker to produce extreme waves. <br /> <br /> <br /> <br /> <br /> <br /> <br /> In this dissertation we consider parameters which affect is investigated waves during their propagation. For a given signal at a certain position, the parameter will effect a position, Xmax, at which the signal comes to a maximum elevation and its amplitude amplification factor (AAF). AAF measures how large a wave at its extreme position in comparison to that of the original position. The investigation of both Xmax and AAF use a quantity, namely Maximal Temporal Amplitude (MTA). This quantity measures at each downstream position, the maximal amplitude of the time signal of the nonlinearly evolving wave. Andonowati and Groesen used this quantity to investigate the optical waves deformations. <br /> <br /> <br /> <br /> <br /> <br /> <br /> While studying the surface waves peaking phenomena, Westhuis et. al. gene-rated bichromatic waves of various of amplitudes and envelope frequencies in hydrodynamic laboratory and then investigated the propagation of the waves. They also built a software for wave generation simulated, called HUBRIS. A related work to understand wave peaking phenomena is Cahyono. He built Analytical Wave Code (AWC) which gives a correcting factor to the wavenumber. AWC is built using KdV model and the third order approximation of the model. They found the most important term which are a part of the third order, called the third order side band for the phenomena. The result showed that the wave high amplification depends on the amplitude and the envelope frequency of the bichromatic waves.