Fully nonlinear modeling of radiated waves generated by floating flared structures
Fully nonlinear modeling of radiated waves generated by floating flared structures
复制标题
浮动喇叭形结构产生的辐射波的完全非线性建模
DOI：
10.1007/s10409-014-0045-6
复制
发表时间：
2014-10
影响因子：
3.5
通讯作者：
Zhao Ming
中科院分区：
文献类型：
--
作者：
Zhou Bin-Zhen;Ning De-Zhi;Teng Bin;Zhao Ming
基于势流理论，对结构受迫运动产生的非线性辐射波进行了数值模拟。采用高阶边界元法建立了一个完全非线性的数值模型。在该模型中，瞬时体位置和瞬态自由表面在每个时间步更新。拉格朗日技术被用作自由表面上的时间推进方案。采用网格重网格和插值方法处理可能出现的数值不稳定性。提出了几个辅助函数来间接计算波浪载荷，而不是直接预测速度势的时间导数。对无限深水下球体的升沉运动、有限深扩口截头圆柱体的升沉和纵摇运动进行了数值模拟。最后，将所得结果与已发表的数值计算结果进行了对比验证，以确保模型的有效性。此外，通过傅里叶变换得到了一系列高次谐波和力分量，以研究振动频率的非线性效应。分析了完全非线性、体非线性和线性结果之间的差异。结果表明，自由表面和物体表面的非线性对辐射波和辐射力的数值计算结果有很大的影响。
The nonlinear radiated waves generated by a structure in forced motion, are simulated numerically based on the potential theory. A fully nonlinear numerical model is developed by using a higher-order boundary element method (HOBEM). In this model, the instantaneous body position and the transient free surface are updated at each time step. A Lagrangian technique is employed as the time marching scheme on the free surface. The mesh regridding and interpolation methods are adopted to deal with the possible numerical instability. Several auxiliary functions are proposed to calculate the wave loads indirectly, instead of directly predicting the temporal derivative of the velocity potential. Numerical experiments are carried out to simulate the heave motions of a submerged sphere in infinite water depth, the heave and pitch motions of a truncated flared cylinder in finite depth. The results are verified against the published numerical results to ensure the effectiveness of the proposed model. Moreover, a series of higher harmonic waves and force components are obtained by the Fourier transformation to investigate the nonlinear effect of oscillation frequency. The difference among fully nonlinear, body-nonlinear and linear results is analyzed. It is found that the nonlinearity due to free surface and body surface has significant influences on the numerical results of the radiated waves and forces.
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DOI：
10.1243/0954405001517928
发表时间：
2000-09
期刊：
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
影响因子：
--
作者：
Z. Z. Li-Z.;A. Nee;X. P. Li
通讯作者：
Z. Z. Li-Z.;A. Nee;X. P. Li
影响因子：
5
作者：
P. Hu;Guoxiong Wu;Q. Ma
通讯作者：
P. Hu;Guoxiong Wu;Q. Ma
影响因子：
4.3
作者：
W. Bai;R. E. Taylor
通讯作者：
W. Bai;R. E. Taylor
DOI：
10.1243/0954406001523821
发表时间：
2000-06
期刊：
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
影响因子：
--
作者：
M. Kashiwagi
通讯作者：
M. Kashiwagi
影响因子：
3.7
作者：
M. Xue;H. Xü;Yuming Liu;D. Yue
通讯作者：
M. Xue;H. Xü;Yuming Liu;D. Yue