基于OpenFOAM的弧形防浪墙受力特性的数值模拟研究

Numerical simulation of force on arc crown wall based on OpenFOAM

弧形防浪墙具有优良的返浪效果,工程应用较多。本文以弧形防浪墙为例,基于OpenFOAM开源程序,应用雷诺平均Navier-Stokes方程描述流体运动,建立了波浪与结构物作用的二维数值模型。通过试验验证所建立的数值模型,探讨不同形式弧形防浪墙所受波浪压强分布特点的异同、弧形防浪墙圆弧半径对所受波浪力的影响。结果表明:在不同波浪要素条件下,弧形防浪墙迎浪面所受波浪压强随测点高程的增大而减小,同一测点上所受波浪压强随弧形防浪墙圆弧半径的增大而减小。防浪墙迎浪面受到的波浪力随着波高的增大而增大,随波长的增大先增大、再减小、再增大,且在波长最大时波浪力达到最大值。在相同波长下,波浪力随圆弧半径增大而减小。

Arc crown wall has excellent wave return effect and many engineering applications. Taking the arc crown wall as an example, based on the OpenFOAM open source program, we develop a two-dimensional numerical model for the action of waves and structures using the Renault average Navier-Stokes equation to describe the fluid motion. The numerical model is verified by the test results, and the similarities and differences of wave pressure distribution characteristics of different types of arc crown wall and the influence of arc radius of arc crown wall on wave force are discussed. The results show that under the conditions of different wave elements, the wave pressure on the wave face of the arc crown wall decreases with the increase of the elevation of the measuring point, the wave pressure on the same pressure measuring point decreases with the increase of the arc radius of the arc crown wall, the wave force on the wave face of the arc crown wall increases with the increase of the wave height, first increases, then decreases and then increases with the increase of the wavelength, and the wave force reaches the maximum at the maximum wavelength. At the same wavelength, the wave force decreases with the increase of arc radius.