The study of the dynamic behavior of a vehicle moving near the sea surface with waves of finite amplitude is a very difficult task. The assessment of the interaction of a body with a moving boundary of the fluid domain is an unsteady, highly non linear problem. In the present work the above mentioned problem is modeled in the time domain through a boundary integral formulation, and the numerical solution is obtained using a panel method. Some simplifying assumptions are adopted to describe the sea surface and the wake evolution. In order to guarantee a correct definition of the problem and an accurate representation of the wave pattern, keeping the computation effort at a reasonable level, a particular algorithm is built for the solution of the equations system. The model is exploited to investigate the response of the aerodynamic lifting system of the SEA-BUS. To this purpose, the behavior of the wing profiles have been studied varying characteristic parameters of the sea: length and amplitude of the waves. Particular attention has been paid to the analysis of the time histories of the lift coefficient acting on the wing.
Analysis of the sea keeping behavior II: Waves of Finite Amplitude
Fabbri;Luigi
2001
Abstract
The study of the dynamic behavior of a vehicle moving near the sea surface with waves of finite amplitude is a very difficult task. The assessment of the interaction of a body with a moving boundary of the fluid domain is an unsteady, highly non linear problem. In the present work the above mentioned problem is modeled in the time domain through a boundary integral formulation, and the numerical solution is obtained using a panel method. Some simplifying assumptions are adopted to describe the sea surface and the wake evolution. In order to guarantee a correct definition of the problem and an accurate representation of the wave pattern, keeping the computation effort at a reasonable level, a particular algorithm is built for the solution of the equations system. The model is exploited to investigate the response of the aerodynamic lifting system of the SEA-BUS. To this purpose, the behavior of the wing profiles have been studied varying characteristic parameters of the sea: length and amplitude of the waves. Particular attention has been paid to the analysis of the time histories of the lift coefficient acting on the wing.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.