A Consideration on Nonlinear Component of Maneuvering Hydrodynamic Force from Segmented Model Test Results : Effect of Shallow Water

This report presents some experimental results of maneuvering hydrodynamic forces obtained from segmented model tests at finite water depth. The experiments were carried out in order to make clear the shallow water effect on distribution of the nonlinear lateral force component over ship\u27s length. Here, it is assumed that the lateral force on each segment can be expressed by a formula consisting of linear and second order terms. From the experimental results, it was examined that to what degree the second order derivatives correspond to the cross-flow drag coefficients in condition of finite water depth. A ratio of the nonlinear derivative to the cross-flow drag coefficient is introduced for each segment of the ship hull. As a result, it is pointed that difference in the ratio distribution due to water depth is large in neighborhood of the ship model bow. Furthermore, it is indicated that the value of the ratio for the total model increases with decrement of the water depth.rights: 社団法人日本船舶海洋工学会協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf:http://ci.nii.ac.jp/naid/110003864457