Effects of Free Surface Fluctuations on Total Wave Force on Cylinder
Publication: Journal of Engineering Mechanics
Volume 121, Issue 2
Abstract
Past studies have revealed that free surface fluctuation has a profound influence on the wave force of elements of objects close to the still-water level. This study examines the effects of free surface fluctuation on the total wave force on a rigid, fixed, vertical, uniform, circular cylinder of small diameter, protruding above the still-water level. The waves are unidirectional, stationary, zero mean, linear, Gaussian, and narrow banded. Expressions of the mean and standard deviation of the total wave force on the cylinder are derived. The effects of free surface fluctuation on these statistical properties are examined for the full range of water depth. This study shows that free surface fluctuation affects the mean value of total wave force only in relatively shallow water, but the standard deviation of the total wave force can be affected in all water depths if the penetration of the cylinder above the still water level is small.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Anastasiou, K. (1982). “The nonlinear properties of random water waves and associated particle kinematics,” PhD dissertation, Dept. of Civ. Engrg., Univ. of Liverpool, Liverpool, England.
2.
Handbook of mathematical functions (1968). Abramowitz, M., and Stegun, I. A., eds. Dover Publ. Inc., New York, N.Y.
3.
Huang, N. E., and Long, S. R.(1980). “An experimental study of the surface elevation probability distribution and statistics of wind generated waves.”J. Fluid Mech., Cambridge, England, 101(1), 179–200.
4.
Isaacson, M.(1991). “Some recent research on random wave forces.”Int. J. Offshore and Polar Engrg., 1(1), 64–70.
5.
Isaacson, M., and Baldwin, J.(1990a). “Random wave forces near the free surface.”J. Wtrwy., Port, Coast. and Oc., ASCE, 116(2), 232–251.
6.
Isaacson, M., and Baldwin, J.(1990b). “Measured and predicted random wave forces near the free surface.”Appl. Oc. Res., Elsevier Sci. Limited, England, 12(4), 188–199.
7.
Isaacson, M., and Subbiah, K.(1991). “Numerical simulation of random wave forces near the free surface.”J. Offshore Mech. and Arctic Engrg., 113(1), 14–22.
8.
Pajouhi, K., and Tung, C. C.(1975). “Statistics of random wave field.”J. Wtrwy., Harb. and Coast. Engrg., ASCE, 101(4), 438–449.
9.
Tung, C. C.(1975a). “Statistical properties of the kinematics and dynamics of a random gravity-wave field.”J. Fluid Mech., Cambridge, England, 70(2), 251–255.
10.
Tung, C. C. (1975b). “Statistical properties of wave force.”J. Engrg. Mech., ASCE, 100(I), 1–11.
11.
Tung, C. C.(1976). “Statistical properties of pressure in a random wave field.”J. Phys. Oceanography, 6(4), 589–591.
12.
Tung, C. C.(1977). “Statistical properties of a layered medium disturbed by internal waves.”J. Phys. Oceanography, 7(5), 749–752.
13.
Tung, C. C., and Huang, N. E.(1984). “Statistical properties of the kinematics and dynamics of nonlinear waves.”J. Phys. Oceanography, 14(3), 594–600.
14.
Tung, C. C., and Huang, N. E. (1985). “Covariances and spectra of the kinematics and dynamics of nonlinear waves.”J. Geophysical Res., 90(C9), 11,911–11,916.
15.
Tung, C. C., and Pajouhi, K.(1976). “Covariance functions and spectra of a random wave field.”J. Phys. Oceanography, 5(1), 104–107.
Information & Authors
Information
Published In
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Feb 1, 1995
Published in print: Feb 1995
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.