The Water Impact of Flexible and Rigid Plates
Abstract
The goal of the proposed work is to explore the physics of the controlled high-speed impact offlexible and rigid plates on quiescent and wavy water surfaces through experiments performed ina high-speed towing tank that is 13.7 m long, 2.4 m wide and 1.3 m deep. The plate will beattached to a vertical carriage that allows for a total displacement of 0.6 m with speeds up to 2m/s. The vertical carriage is in turn mounted on a horizontal towing carriage that moves alongthe 13.7-m length of the tank with speeds up to 10 m/s. A computer-based feedback controlsystem with position and velocity sensors on both motion axes is used to provide highlyrepeatable and accurate model motions. In a typical experimental run, the model is propelledalong the tank by the horizontal carriage and, when it reaches maximum speed in the middle ofthe tank, the vertical traverser slams the model into the water surface. This system is designed asa highly controllable and repeatable model of the impact of a high-speed hull form with waves.In the proposed work, experiments will be performed with a quiescent water surface (as acontinuation of our previous work) and with a water surface with waves ranging in amplitudefrom small linear waves to large-amplitude breaking waves. Measurements of the spraygenerated, the forces on the plate, the plate deflection, the plate strain and the pressure on the wetsurface of the plate will be obtained. The measurements will be used to explore the physics ofplate impact and spray generation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012349
Entities
People
- James S Duncan
Organizations
- Office of Naval Research
- United States Navy
- University of Maryland