Model and Small-Scale Tests to Evaluate the Performance of Drag Anchors in Combination.

摘要

Model and small-scale field tests of high efficiency anchors in tandem (piggy back) and in parallel have been performed to evaluate the feasibility of using anchors in combination to satisfy expanded Navy fleet mooring requirements. This report presents the results of model tests in sand and in a synthetic clay-like material with 1/20th-scale models of a 6,000-pound STATO anchor and results of tests in beach sand with 200-pound STATOand 350-pound DANFORTH anchors. Feasible rigging methods for using combinations of high efficiency anchors that are compatible with Navy installations and handling capability are defined. Anchors in tandem and parallel can be arranged to achieve system capacities that exceed the sum of two individually pulled anchors. The increased performance averages 20% to 30% and is directly related to potential cost savings in anchor procurements.