Accession Number:

AD0701783

Title:

HYDRODYNAMIC FORCES ON SOME FLOAT FORMS.

Descriptive Note:

Final rept.,

Corporate Author:

STEVENS INST OF TECH HOBOKEN N J DAVIDSON LAB

Personal Author(s):

• Mercier,John A.

Report Date:

1969-10-01

Pagination or Media Count:

69.0

Abstract:

Results of hydrodynamic tests of several models of typical buoy shapes are presented. Measurements of lift, drag and pitch moment are made for the heave, surge and pitch modes of motion in otherwise smooth water and for the model held fixed with surface waves passing by. These results are necessary for evaluating the motions of these bodies for arbitrary mass distributions, using the equations of motions. Coefficients expressing the inertial and damping characteristics of these models, based on the assumption of linearity of forces with motion and wave amplitude are presented in tables. Amplitudes and phases for the wave exciting forces are tabulated. Models tested include a half-immersed sphere, a half-immersed torus, a one-fiftieth scale model of the Monster Buoy, a shallow draft rectangular barge, and a cylinder with a square damping plate at the lower end and with a hemispherical bottom cap. Author

Descriptors:

• (*FLOATS
• HYDRODYNAMICS)
• (*BUOYS
• HYDRODYNAMICS)
• FLOATING BODIES
• MODELS(SIMULATIONS)
• HULLS(MARINE)
• PITCH(MOTION)
• ROLL
• YAW
• OSCILLATION
• DAMPING
• FORCE(MECHANICS)
• EQUATIONS OF MOTION

Subject Categories:

• Marine Engineering
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE