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|Title:||Analysis of the added mass of a barge in restricted waters. Phase 1, Model|
|Authors:||Johns Hopkins University. Department of Civil Engineering.|
Innovations for Navigation Projects Research Program (U.S.)
McCormick, Michael E., 1936-
Kraemer, David R. B.
Hudson, Patrick L.
|Publisher:||Information Technology Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||ERDC/ITL TR 02-8 phase 1.|
Abstract: This report presents a theoretical analysis of the added mass of barges in restricted waters. The added mass behaviors with varying waterway and barge parameters are predicted. While variations in both the water depth and barge speed are seen to strongly influence the added-mass (added-weight) values, the separation between the barge and quay (side) wall is seen to have influence near the wall. For practical cases where the barge has rake angles less than 90 deg, the wall effect is evident only when the barge motion is parallel or nearly parallel to the wall. This analysis, based partly on empirical observations, proves useful for the initial investigation of the problem. Described herein is a low-speed analysis. That is, the current analysis is based on an observed free-surface phenomenon that occurs only at slow speeds. The barge speed range is between 0 and 4 fps (0 and 1.2 m/s). At higher speeds, the surface waves system becomes a subcritical ship wave system, having transverse and divergent component waves. The higher speeds will be analyzed in the follow-on part (Phase 2) of this research. In that study, the boundary-element technique will be applied to the problem.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|