Impulse Response of a Floating Body and Identification for Memory Effect Functions

Abstract

This study deals with the impulse response of a horizontal circular cylinder. Forced and free oscillation tests in a still water were performed. The technique for identifying the memory effect function from the measurements are reviewed both in the time domain and frequency domain. The memory effect function is transformed to corresponding frequency dependent hydrodynamic coefficients of a cylinder using the Fourier transform and they are compared with the solutions of a radiation problem. The obtained results are compared with the analytical solution and the validity of the identification methods is discussed.