Anti-resonance breakwater design method

Abstract

The invention discloses an anti-resonance breakwater design method. The method comprises the steps of determining an arrangement axis of a vertical wall type structure; obtaining input parameters of the computational domain; discretizing a computational domain through a finite element eight-node isoparametric element method; carrying out wave field simulation through a quasi-Helmholtz equation wave model, and determining a reflection wave field under the frequency domain change of a computational domain; and according to the grating equation, determining the design parameter wave number K and amplitude A of the sine curved surface of the vertical wall type structure. A Laplace equation is solved through an FAT theory, boundary conditions are substituted, a quasi-Helmholtz equation containing wave nonlinearity under the condition that the water depth is not changed is derived, a wave field of a harbor basin is calculated through a finite element method, the grating principle and the quasi-Helmholtz equation wave theory are combined, a breakwater vertical wall section structural form is designed, the size of a vertical wall curved surface is determined, and the wave propagation process is attenuated, and wave propagation is dissipated, so that harbor resonance caused by propagation of incident waves to a harbor basin is reduced.

Description

technical field [0001] The invention relates to the technical field of coastal engineering, in particular to an anti-resonance breakwater design method. Background technique [0002] Harbor oscillation has always been a research direction that has received great attention in coastal engineering. A port is an area with a large number of active personnel and high intensity of production and transportation activities. Many large ships are usually moored in the harbor. The harbor oscillation will affect the loading and unloading operations and normal operation of the port if it is light, and it will pose a great threat to life if it is serious. Moreover, harbor oscillation phenomenon exists widely in the world. [0003] Harbor resonance is a phenomenon of water wave oscillation that occurs in enclosed or semi-enclosed waters. The small periodic fluctuations (also known as false tides) superimposed on the tidal process line observed in the bay, the oscillation of the waters in...

AI Technical Summary

Problems solved by technology

The first is to change the shape of the harbor basin so that the resonant frequency shifts and does not match the local wave conditions and ship response frequency

The second is to take measures to weaken long-term fluctuations. It is difficult to quickly reduce long-term fluctuations. We only try to prevent energy from entering the port by extending or increasing breakwaters in the later stage. However, after the width of the gate is narrowed, the energy in the port is also It is not easy to be discharged, making the energy in the port accumulate more and more

Increase the energy dissipation boundary as a supplementary energy dissipation measure after the completion of the port. In fact, the installation of energy dissipation facilities is difficult, and it is easy to be damaged when the wave force is concentrated

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