Accession Number:

ADA009761

Title:

Seakeeping Characteristics of the XR-5, a High Length-Beam Ratio Manned Surface Effect Testcraft: 1. XR-5 Model Response in Regular Head Waves,

Descriptive Note:

Corporate Author:

NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT

Personal Author(s):

Report Date:

1975-03-01

Pagination or Media Count:

89.0

Abstract:

Motion response data for regular waves in head seas is presented for a model of a high lengthbeam ratio surface effect ship SES. Data is presented in normalized form for pitch, heave, relative bow velocity, relative bow motion, stern seal motion, bow acceleration and heave acceleration. The pitch motion data exhibits a resonant or underdamped behavior governed by a constant natural frequency throughout the speed range investigated. The wave pumping effect was observed in the supercritical frequency range, and was particularly evident in the normalized acceleration data. The relative bow motion exhibits a pronounced peak at a frequency slightly above the pitching natural frequency.

Subject Categories:

  • Surface Effect Vehicles and Amphibious Vehicles
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE