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波向线逆向追踪是基于近岸工程点逆向追踪波向线至深水处获取波要素的一种波浪折射计算方法。由于计算目标的明确,不仅大大减少了计算量,而且也提高了计算的精度,在海岸工程中具有广泛的应用前景。本文从波向线逆向追踪的原理着手,推导了波向线逆向折射计算方程,并就人工半岛围堤前沿某一工程点处的波浪要素,运用波向线逆向追踪进行了波浪折射计算,结果表明对深水波要素 =0.42m、 =2.86s、波向SE向情况下,波浪经折射传播到近岸工程点处(0m等深线),波要素为 =0.35m,波向145.5°。
Wave-line reverse tracking is a method of calculating wave refraction based on the point-nearshore engineering point of reverse-tracking the wave-line to the deep-water acquisition of wave elements. Due to the clear calculation target, not only the computational cost is greatly reduced, but also the precision of calculation is improved. So it has a wide range of application prospects in coastal engineering. In this paper, we begin with the principle of wave-line reverse tracking and derive the wave-line reverse-refraction equation. Wave-refraction calculation is made by using the wave-line reverse tracking for the wave elements at a certain engineering point in the forefront of the artificial peninsula. It shows that for the wave component of deep water = 0.42m, = 2.86s, the wave propagates to the nearshore engineering point (0m isobath) through the refraction of the wave in SE direction. The wave component is = 0.35m and the wave direction is 145.5 °.