Experimentación con modelos simplificados de embarcaciones interislas de Galápagos sometidos a olas rompientes laterales

Abstract

The present project analyzes the capsizing mechanism of high-speed inter-island craft operating in the Galapagos Islands when subjected to lateral breaking waves, with the aim of improving maritime transport safety in the insular region. It is assumed that the transverse dynamic response and the probability of capsizing depend on hull geometry, initial stability, and the characteristics of excitation induced by breaking waves. The study was conducted experimentally in the wave tank of the SiMar laboratory, where a controlled breaking-wave generation system was implemented using an adjustable-slope ramp. In addition, three constant-section models with different deadrise angles were constructed, along with a movable ballast system to vary the vertical position of the center of gravity. Inclination, free-oscillation, and forced-oscillation tests were performed by varying the excitation frequency and amplitude. Roll angles and accelerations were recorded using a wireless sensor. The results showed nonlinear dynamic behavior, progressive heel accumulation, and a reduction of the effective freeboard under repeated lateral excitations. It is concluded that hull geometry significantly influences the distribution of energy between heave and roll, thereby conditioning transverse stability and the likelihood of capsizing. Keywords: transverse stability, dynamic response, capsizing, roll