Added mass of submerged objects of arbitrary shapes

Download
Author
Berklite, Ronald Betts
Date
1972-09Advisor
Garrison, C.J.
Metadata
Show full item recordAbstract
Hydrodynamic loads induced on large underwater structures
by Impulsive motion may be significant design factors. Such
loads may be induced by earthquake excitation or may result
from acceleration produced while lifting an object in the
sea.
The theoretical approach to the calculation of these
loads is outlined and numerical results are presented for
several submerged configurations including a vertical cone,
a sphere, and a vertical circular cylinder.
Numerical results for these submerged structures are
presented in the form of a dimensionless load parameter or
added mass coefficient. Results corresponding to a number
of different water depths are presented to show the rather
sizable effect of the relative water depth on the hydrodynamic force. It is shown that the effect of the free
water surface is to reduce the hydrodynamic loads in
comparison to the corresponding infinite depth values.
Experimental results obtained by vibration testing are
presented for a submerged sphere, a cone and a vertical
cylinder. These results show excellent agreement with the
theoretical results.
Collections
Related items
Showing items related by title, author, creator and subject.
-
Hydrodynamic Loads Induced By Earthquakes
Garrison, C.J.; Berklite, R.B. (1972);When bottom mounted structures of large displacement are immersed in the sea. earthquake induced hydrodynamic loads may become important design factors. Specifically, as the earth oscillates, a bottom mounted structure is ... -
Design of a hover mode autopilot for the Phoenix autonomous underwater vehicle
Gonzalez, Juan Cesar (Monterey, California. Naval Postgraduate School, 1995-06);The potential uses for autonomous underwater vehicles (AUV's) is gaining recognition by organizations world wide. As such, continuous research toward improving existing vehicles by seeking new designs and increasing ... -
A numerical study of rotating convection during tropical cyclogenesis [seminar announcement}
Kilroy, Gerard (Monterey, California; Naval Postgraduate School, 2014-03-10);Idealized numerical model experiments are presented to investigate the convective generation of vertical vorticity in a tropical depression. The calculations are motivated by observations made during the recent PREDICT ...