以海面质点垂向加速度为判据的白浪绘制

发布时间：2019-08-07 18:22

【摘要】：白浪绘制中常用海面高程、Jacobian行列式作为白浪生成的判据,但这两种方法缺乏海洋工程相关理论的支持,绘制结果不够逼真。针对上述问题,本文提出了以海面质点垂向加速度为判据的白浪绘制方法。推导了海面质点垂向加速度的快速傅里叶逆变换形式,并给出了以海面质点垂向加速度为变量的连续型白浪覆盖率随机函数,通过调整该函数的参数来控制白浪消逝的时间。实验结果表明:用该函数计算的白浪覆盖率均值与采用统计模型计算的白浪覆盖率相等。将该白浪覆盖率作为融合因子,融合白浪纹理像素颜色和海面像素颜色。本文提出的白浪绘制方法有合理的理论依据,计算量小,绘制的白浪与蒲氏风级对白浪的描述接近,帧率可以达到实时计算。
[Abstract]:Sea surface elevation is often used in white wave rendering. Jacobian determinant is used as the criterion of white wave generation, but these two methods lack the support of marine engineering related theories, and the rendering results are not realistic enough. In order to solve the above problems, a white wave rendering method based on the vertical acceleration of sea surface particles is proposed in this paper. In this paper, the inverse fast Fourier transform of vertical acceleration of sea surface particles is derived, and a continuous random function of white wave coverage with vertical acceleration of sea surface particles as a variable is given to control the fading time of white waves by adjusting the parameters of the function. The experimental results show that the mean white wave coverage calculated by this function is equal to the white wave coverage calculated by statistical model. The white wave coverage is used as the fusion factor to combine the white wave texture pixel color and the sea surface pixel color. The white wave rendering method proposed in this paper has a reasonable theoretical basis, the amount of calculation is small, the white wave is close to the description of the white wave by the Brinell wind level, and the frame rate can be calculated in real time.
【作者单位】：广州航海学院海运学院;大连海事大学航海动态仿真与控制交通行业重点实验室;
【基金】：国家高技术研究发展计划(2015AA016404) 中央高校基本科研业务经费项目(3132013302)
【分类号】：TP391.41

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