A Study of Artificial Reef Subsidence in Unsteady Flow Field

J. Ocean Eng. Technol. 2001;15(2):33-38.

비정상 흐름장의 인공어초 침하특성에 관한 실험적 연구

김헌태

부경대학교 해양공학과

Keywords: Artificial reef, Scour, Subsidence, Unsteady flow, Asymmetric ground, Slant

핵심용어: 인공어초, 세굴, 침하, 비정상 흐름, 비대칭 지반, 기울임

Abstract

The subsidence characteristics of artificial reef (AFR) in the unsteady flow such as tidal flow were investigated. The scour and subsidence characteristics were confirmed in the steady flow field. In a main study, the interaction of "Flow - Sediment Movement - Structure Behavior" and scou $r_sidence mechanism were discussed int he unsteady flow field. AFR subsidence characteristics was discussed with Reynolds number(Re*), Shields number(Sn*), dimensionless acceleration of flow (af/g) and dimensionless time (t/T). Most of all, the continuous AFR subsidence from the scour was occurred by periodic behavior of AFR. This behavior is result from the asymmetric ground, and is influenced by maximum velocity, duration time and direction of flow.ow.