Instantaneous Morison Equation Force Coefficients Computation
Final rept. Oct 1983-Sep 1986
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
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This research hypothesized that the use of conventional time invariant drag and inertia coefficients in the Morison equation for dynamic wave force simulation is incorrect. These coefficients are obtained via period averaging regression analysis techniques that efface the subperiodic fluctuation in the flow and pressure fields adjacent to structural members. Computer programs were written to develop a set of instantaneous drag and inertia coefficients for use in conjunction with the Morison equation to retain this subperiodic information. The results of this effort are inconclusive due to the computation of some negative instantaneous drag coefficients from ostensibly reliable well conditioned wave force experimental data.