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基于随机波浪的Longuet-Higgins模型,提出了一个改进的相位调制方法模拟畸形波。调制部分组成波的随机初相位,使该部分组成波的波高在预定地点和预定时间为正,波浪在此叠加形成畸形波。该方法不但能够实现定时定点生成畸形波,同时既可以满足波浪序列的统计特性、又保持目标谱的结构。与现有线性叠加法比较,该方法可以模拟得到更高畸形度的畸形波。对“新年波”等3个实测波列进行模拟验证,结果表明本方法模拟畸形波具有良好的精度和较高的效率。
Based on the Longuet-Higgins model of random wave, an improved phase modulation method is proposed to simulate the normal wave. Modulation part of the composition of the wave of random initial phase, so that part of the composition of the wave height at a predetermined location and a predetermined time is positive, the waves superimposed here forming a normal wave. This method not only can realize the regular fixed wave generation, but also can satisfy the statistical characteristics of the wave series and maintain the structure of the target spectrum. Compared with the existing linear superposition method, this method can simulate the deformed wave with higher deformability. The simulation of three measured wave trains such as “New Year Wave” shows that this method has good accuracy and high efficiency in modeling normal wave.