Hydrodynamic Impact Loads in Smooth Water for a Prismatic Float Having an Angle of Dead Rise of 10 deg
Abstract
A prismatic float with an angle of dead rise of 10 deg was subjected to smooth-water impacts in the Langley impact basin. The investigation consisted of a series of impacts at fixed angles of trim of 3 deg, 12 deg, 20 deg, and 30 deg and at flight-path angles from 2 deg to 23 deg. The data are tabulated and the variations of dimensionless coefficients with flight-path angle are compared with the theoretical variation. The experimental data are used to evaluate theoretical and empirical means of determining dead-rise function, aspect-ratio factor, and draft where chine-immersion effects will occur. Experimental values of dead-rise function and aspect-ratio factor are found to be in agreement with pi/2Beta - 1, where Beta is angle of dead rise, and with Pabst's aspect-ratio factor. In the determination of draft where chine-immersion effects will occur, an empirical value of dead-rise function for water pileup at an angle of dead rise of 10 deg and an angle of trim of 3 deg is obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1956
- Accession Number
- ADA377399
Entities
People
- Philip M. Edge Jr.
Organizations
- National Aeronautics and Space Administration