. Challenge to better agreement between theoretical computations and measurements in ship hydrodynamics. Ships; Water waves. observe a remarkable improvement in agreement with measured results by the calculation including the three-dimensional effect, especially at lower frequencies. One of the reasons of deviation with the results by the strip theory may be attributed to the logarithmic term, £nKr, in the two- dimensional solution which makes the added mass infinite at zero frequency limit. The three-dimensional part of the velocity potential has a term which cancels the above logarithmic sin
. Challenge to better agreement between theoretical computations and measurements in ship hydrodynamics. Ships; Water waves. observe a remarkable improvement in agreement with measured results by the calculation including the three-dimensional effect, especially at lower frequencies. One of the reasons of deviation with the results by the strip theory may be attributed to the logarithmic term, £nKr, in the two- dimensional solution which makes the added mass infinite at zero frequency limit. The three-dimensional part of the velocity potential has a term which cancels the above logarithmic singularity. The application of the simple slender body theory, which has been described in an earlier section, presents such an unrealistic result as negative value of added mass and infinite increase in damping coefficient at higher frequencies. Computed results for the source term an(x) are shown in Figure 8. The result by the simple slender body theory which determines the near-field solution by the condition for a double body shows much deviation from other theories. This fact may be the main reason of the ill behavior of the slender body calculation. The fair agreement between strip theory and the present calculation suggests that the source term can be determined by the two-dimensional calculation without regard for the three-dimensional effect, or an(x) = V(x)An(x). X 10. _ -100 — -150 — -180. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Maruo, H. (Hajime), 1922-; David W. Taylor Naval Ship Research and Development Center; United States. Navy Dept. Bethesda, Md. : David W. Taylor Naval Ship Research and Development Center
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Keywords: ., bookauthorunitedstatesnavydep, bookcentury1900, booksubjectships
