The Transient Excitation and Oscillation Testing Technique Applied to a Captive Model.

Wave excitation and oscillation experiments were conducted to test a transient technique applied to a planing hull form model in the displacement mode. The transient technique uses a pulse which contains a range of frequencies frequency packet. The technique is thus capable of gathering information that normally requires a series of single-frequency experiments. The heave exciting force and pitch moment obtained by the transient excitation technique are compared with those found by regular wave excitation. The coefficients from pitch and heave oscillations are also presented for both the transient technique and the regualr single-frequency technique. The transient technique shows good correlation with the standard technique, yet obtains the experimental data of numerous single-frequency oscillations or wave excitations with a single data segment. This should lead to either a savings in data-gathering time or an increase in the information obtained over a given experimental period. Author