Hydrodynamic Performance of Submerged Plates During Focused Waves

Abstract

Submerged horizontal plates are widely employed in research of wave structure interaction as a simplification of coastal and ocean engineering structures. The hydrodynamic performance of submerged horizontal plates under focused waves has been seldom reported. Based on potential flow theory, this paper presents a general solution of the hydrodynamic pressure and wave forces exerted on submerged plates by a focused wave group. An existing experiment and two limiting cases are used to validate the accuracy of the present analytical model. With the validated model, the effect of wave properties and the configuration of the wave structure system on the hydrodynamic performance of submerged plates are investigated. It is found that the hydrodynamic performance of submerged horizontal plates varies with incident focused wave with different peak frequencies. The structural breadth significantly changes the hydrodynamic performance while the structural height has little influence. This paper shows the usefulness of potential flow theory for the preliminary calculation of wave loads on coastal and ocean engineering structures generated by focused waves.

Study of wave forces acting on the box-girder superstructure of coastal bridges in the submerged condition based on potential flow theory

“…The effects of wave propagation direction, wave properties, and structural configuration were investigated using the proposed analytical method, and the accuracy of the proposed method was validated by an oblique wave test of a 1:10 scaled bridge model (Fang et al 2019a). The research conducted by Fang et al (2019b) also proved that the potential flow theory is also accurate and efficient in calculating the focused wave force on submerged plates. Previous literature has indicated that the differences of wave forces on the box-girder bridges and T-girder bridges are quite different, thus whether the potential flow theory can be used to accurately calculate the wave force on the boxgirder superstructures is worth exploring (Huang et al 2018a).…”

Experimental and 3D numerical investigation of solitary wave forces on coastal bridges

“…The combination of these forces can overcome the weight of the superstructure and leads to the connection failure, and thus, the bridge deck is unseated away from the substructure (Ataei and Padgett 2012). However, the way that the wave forces work is complicated and affected by many parameters including wavelength, period, wave height, celerity and frequency, as well as the structure profile (Fang et al 2019b). In addition, the prototype scale wave forces could only be approximated in situations with no trapped air, or air fully trapped between girders (Seiffert et al 2015), while which is highly complicated in real hazard.…”