| Breakwater is a common structure in the port engineering, it plays an important role in blocking the wave flow from ocean and keeping the water surface of the port stable. With the development of modern port, the traditional breakwater can’t satisfy the requeriment of modern port,the traditional breakwater turn to the new type of permeableã€dissipating structure. The performance of a newly proposed composite breakwater is invested in this paper and we mainly disscuss the load of upper structure—multiple horizontal cylinders. Through this physical model test, considering the effect of the relative submerged depth Z/a, the wave height H, relative space between horizontal cylinders S/a and different arrangements of horizontal cylinders,the point pressure change regulation with different factors of horizontal cylinders are analyed and the wave load change regulation of horizontal cylinders are analyed. According to the physical model tests, the results can be summarized as follows:1) The probe pressure of horizontal cylinder is affected by the submerged depth Z, the wavelength L. when two cylinders arrange in horizontal direction,it rarely changes with the space between the two cylinders.when many cylinders arranges,the probe pressure of horizontal cylinder obviously decrease.2) The relative submerged depth z/a, the wave height and the relative space of arrangement S/a have the primary influence on the wave force of horizontal cylinders. Within the range of the tests, the wave force increases as the wave height increases, and it is almost proportional to the wave height. And the wave force decreases a little as the submerged depth and the space arrangement increases.3) Through the reflection and transmission research of different cylinders arrangement structure,we find the cylinders on the surface of water and under certain depth (Z/a≤2) play a major role in dissipating the wave energy,increasing the cylinder number on the water surface can obviously improve the effect of the structure. |
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