The waves characteristics study of being vibrated cassion-type breakwater

• Main Authors: Tsao- Nan Ma, 馬肇南
• Other Authors: Ching-yun yue
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/26657378220748794717

碩士 === 國立海洋大學 === 河海工程學系碩士在職專班 === 90 === The field data of wave pressure and vibration of caisson-type breakwater carried out by Center of Harbor and Marine Technology, Institute of Transportation, MOTC at Hua-Lien Port was analyzed and compared. The results show that the acceleration in all directions on caisson during the earthquake activity is greater than the measuring in land. That is, the magnitude is larger and the frequency is higher. The vertical magnitude is one-tenth of the horizontal magnitude. The water level on both sides has 10 cm difference which might be related to wave period and the phase of waves acting on the caisson. Turbulence occurred near the mean water level that affects the wave pressure. The influences from the vibration of caisson on wave pressure and water level are only on high frequency portion, and only a small region below the mean water level has clear increased wave pressure, and the spectral peak frequency tends to higher. This paper collect data of wave pressure and vibration is not enought，a further field observation is need.