Estimation of added-mass and damping coefficients of a tethered spherical float using potential flow theory

摘要: Abstract Added-mass (α) and damping coefficients (β) of a tethered spherical float, undergoing oscillatory motion in sinusoidal waves, have been derived from the generated velocity potential for one degree-of-freedom (surge) using flow theory. Variations added-mass with respect to water depth, wave period float size obtained. show that these hydrodynamic are frequently dependent, this is because associated generation surface gravity waves by oscillating float. The unaffected but increase Natural resonant frequencies computed wide range periods α β values. Theoretical values natural sscillation agree closely experimental