以 PIV 技術探討浮式翼板結構物引起的渦流能量特性之研究

Abstract

In order to reduce the impact of marine disasters on the coast and land, many breakwaters have been set up to resist waves. In recent years, flexible construction methods have gradually replaced traditional rigid construction methods. In this study, a fence-type floating structure is used to simulate rigid vegetation combine with floating structure, the energy loss coefficient of periodic waves passing through different combinations of fence-type floating structures is discussed by means of hydraulic model tests, and the particle image velocimetry(PIV) technology is used to observe the velocity field changes under structure when waves pass through, the experimental data are compared and discussed. Its purpose is to reduce the energy of waves acting on the coast and reduce the damage to the coastal area. It is found that when waves pass through the fence model, there will be a damping effect, which reduces the transmission of wave energy to the rear of the structure. Higher fence coverage and longer fence length can both increase the energy loss when waves pass through, and significant impact on long-period waves has larger than short-period waves.