Ship Dynamics in the Surf Zone Model Testing
Technical rept. 19 May-25 Jul 2008
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SHIP SYSTEMS INTEGRATION AND DESIGN DEPARTMENT
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The aim of this project was to generate data to identify the forces and motions on a ship model while positioned in breaking surf. The two types of breaking waves analyzed were plunging and spilling waves. A 140 feet long model test basin at the Naval Surface Warfare Center Carderock Division NSWCCD was used to create the waves with a flap wave maker and the heave motions, pitch motions, and surge forces found acting on the model were measured. To create a breaking wave, a beach was built to represent an actual beach slope and continental shelf slope. The ship model tested is similar to landing craft that operate in the surf zone broad beam and shallow draft. All data will be utilized in a Masters thesis where it will be thoroughly analyzed and used to create a transfer function that will help predict ship motions and forces in actual seaways.
- Marine Engineering