Dynamic Behavior of Vertical Breakwater Induced by Regular Waves

• Main Authors: Ying-Chieh Lin, 林英傑
• Other Authors: Jaw-Guei Lin
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/79720576834818263286

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 92 === In this study, a series of hydraulic model tests about the dynamic behavior of breakwater induced by regular waves had been carried out in a large wave flume. Ten wave cases including four wave periods with eight repeats were tested. The wave motions in front of the breakwater, wave pressure acting on vertical wall and the bottom, displacements, pitching angles, and accelerations of the caisson were measured simultaneously. Due to too many resources involve in the caisson’s acceleration and pitching to analyze, the relations between wave motion and wave forces, and the displacement of the caisson were discussed in the paper. Compare to Goda’s force theory, the pressure distributions on vertical wall and bottom are different, and the vertical pressure at sea of the bottom is smaller than the horizontal pressure at toe, and non-zero at the port side, the total horizontal forces are varied. The range of pitching motion and the permanent displacement of the caisson are increased when wave height and period increased. From the simulation of typhoon wave acting duration, we found a threshold wave force to distinguish the linear stable relation between wave force and caisson motion, and the unstable relation between them.