잠제 천단고에 따른 천단 블록의 거동특성에 관한 연구

Abstract

In this study, the water particle velocity on the crest of submerged breakwaters is numerically computed to investigate the behavior characteristics of tetrapods due to the wave condition change. Two-dimensional numerical wave flume based on the VOF method was used. Numerical model was calibrated against the data from hydraulic model experiments. The main results are summarized as follows: 1) The maximum velocity is increased as the period is longer and wave height is higher. From the results of numerical modeling, in case of relative crest height 1.0, velocity on crest of onshore higher than offshore. In case of relative crest height 1.66, The points occurred the maximum velocity are edge of submerged breakwaters. 2) From the results of experiment, the rocking rate is increased as the relative crest height is smaller and relative wave height is larger. In case of relative crest height 1.0, 0.66, the rocking rate is increased as the wave period is longer. However In case of relative crest height 0.5, 0.33, the impact of the wave period did not appear. 3) The rocking rate is increased as the relative crest height is smaller. According to changes in the wave period and relative wave heght has changed the location of rocking.