Accession Number:

ADA616198

Title:

An Investigation of Wave Impact Duration in High-Speed Planing Craft in Rough Water

Descriptive Note:

Final rept. June 2013-June 2014

Corporate Author:

NAVAL SURFACE WARFARE CENTER CARDEROCK DIV NORFOLK VA COMBATANT CRAFT DEPT

Personal Author(s):

• Riley, Michael R.
• Haupt, Kelly D.
• Murphy, Heidi P.

Report Date:

2014-04-01

Pagination or Media Count:

45.0

Abstract:

This report summarizes the investigation of wave impact duration. Example data plots are presented that show that impact durations vary from 100 milliseconds to 450 milliseconds for craft that weigh from 14,000 pounds to 105,000 pounds and have deep-V hulls with deadrise from 18 degrees to 22 degrees. Simple theoretical calculations are presented to show why impact duration is critical to understanding the effects of impact loads on physical systems.

Descriptors:

• *HIGH ACCELERATION
• *LANDING IMPACT
• *PLANING SURFACES
• *SHIPS
• *WATER WAVES
• ACCELEROMETERS
• DATA ACQUISITION
• DEGREES OF FREEDOM
• HULLS(MARINE)
• HYDRODYNAMICS
• MARINE SURFACE PROPULSION
• MATHEMATICAL MODELS
• PULSE DURATION MODULATION
• RESONANT FREQUENCY
• SEQUENCES(MATHEMATICS)
• SHIP MOTION
• SHOCK SPECTRA
• SLAMMING
• SURFACE WATERS
• VERTICAL ORIENTATION

Subject Categories:

• Marine Engineering
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE