Wave Absorbing Performance Test of Cavity Resonance Type Floating Breakwater
A cavity resonance type floating breakwater is designed based on the Helmholtz resonator principle.By designing a reasonable cavity structure,the external wave resonates with the fluid in the cavity,thus attenuating the wave energy and effectively improving the wave attenuation effect of long-period waves.For this purpose,the cavity resonance model with four different gap distances at the bottom and one traditional box-type floating breakwater model are analyzed and compared.The transmission coefficient,motion response and mooring force at different wave heights and periods are studied.The results show that the cavity resonance type floating breakwater can effectively overcome the technical defects of the traditional box-type floating breakwater in the application of long-period wave attenuation.At the same time,under the same principal scale,the long-period wave transmission coefficient of the cavity resonance floating breakwater with the ratio of gap-to-width of 0.3 can be reduced by 15％to 20％compared with that of the traditional box-type floating breakwater.
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