Showing papers on "Breakwater published in 1969"

Damping Effect of Floating Breakwater

Abstract: The results of experimental studies are presented concerning the mechanism of attenuation of waves and the damping effect of the floating breakwater to which the system of phase difference is applied is shown As the floating body rolls responding to the incident wave and simultaneously is forced by mooring ropes, so the phase difference between motion of the floating body and the incident waves occurs Four basic shapes, inverse trapezoid, trapezoid, rectangle and triangle, are adopted for the cross section of floating breakwater The models of floating body are moored to the bottom with the mooring ropes 25 times as long as the water depth A moored floating breakwater with an inverse trapezoid in cross section highly susceptible to roll when freely floating has a high damping effect when the ratio of the natural rolling period of the floating breakwater to the wave period is unity

On the Wave Damping Effect of Double Curtain Wall Breakwater

Abstract: (1969). On the Wave Damping Effect of Double Curtain Wall Breakwater. Coastal Engineering in Japan: Vol. 12, No. 1, pp. 41-45.

Design for Expansion of Port San Luis, California; Hydraulic Model Investigation.

Abstract: : A 1:100-scale model of Port San Luis (formerly known as San Luis Obispo Harbor), California, and sufficient offshore area to permit generation of the required test waves was used to investigate the arrangement and design of certain proposed harbor improvements with respect to wave action. The proposed harbor improvements consisted of (a) an 1150-ft-long south breakwater extending East-northeast from Smith Island, with a 370-ft-long breakwater wing extending northward from this structure; (b) a 3515-ft-long detached breakwater with a north-northeast to south-southwest alignment, located approximately 500 ft seaward of the Port San Luis Wharf; (c) a 1300-ft-long north breakwater extending from a point on shore southward toward the north end of the detached breakwater; and (d) development of the inner harbor by constructing landfill areas and boat slips for the anchorage of small pleasure craft. A 60-ft-long wave machine and electrical wave height measuring and recording apparatus were utilized in model operation. Base tests were conducted with existing prototype conditions installed in the model. Results of tests involving the various improvement plans were compared with base test results to determine the relative effectiveness of the respective plans. (Author)