Accession Number:

AD0745777

Title:

Measurements and Calculations of Ship Resistance in Waves

Descriptive Note:

Technical rept.

Corporate Author:

CALIFORNIA UNIV BERKELEY COLL OF ENGINEERING

Personal Author(s):

• Sibul, O. J.

Report Date:

1971-12-01

Pagination or Media Count:

33.0

Abstract:

The comparison of the constant-thrust and constant-velocity methods of towing in waves for the measurement of added resistance, as reported in previous experiment, was extended to additional models in regular waves. The results indicate a reasonably good agreement between the two methods. The constant-velocity method was used to test the effect of wave height on added resistance. The results demonstrate that added resistance is proportional to the seond power of the wave height for higher waves only. For low waves the relationship could have considerable variation. There are indications that it may be possible to establish standard series of hull forms for added-resistance calculations from available data.

Descriptors:

• *OCEAN WAVES
• *SHIP HULLS
• *SHIPS
• CONFIGURATIONS
• DRAG
• MODEL TESTS
• SHIP MODELS
• STEERING
• THRUST
• TOWED BODIES
• VELOCITY

Subject Categories:

• Marine Engineering
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE