| An Improved Coupling of Numerical and Physical Models for Simulating Wave Propagation简 |
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| 引用本文： | 阳志文,柳淑学,李金宣.An Improved Coupling of Numerical and Physical Models for Simulating Wave Propagation简[J].中国海洋工程,2014,28(1):1-16. |
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| 作者姓名： | 阳志文 柳淑学 李金宣 |
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| 基金项目： | This work was financially supported by the National Natural Science Foundation of China （Grant Nos. 51079023 and 51221961）, and the National Basic Research Program of China （973 Program, Grant Nos. 2013CB036101 and 2011CB013703）. |
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| 摘 要： | An improved coupling of numerical and physical models for simulating 2D wave propagation is developed in this paper. In the proposed model, an unstructured finite element model （FEM） based Boussinesq equations is applied for the numerical wave simulation, and a 2D piston-type wavemaker is used for the physical wave generation. An innovative scheme combining fourth-order Lagrange interpolation and Runge-Kutta scheme is described for solving the coupling equation. A Transfer function modulation method is presented to minimize the errors induced from the hydrodynamic invalidity of the coupling model and/or the mechanical capability of the wavemaker in area where nonlinearities or dispersion predominate. The overall performance and applicability of the coupling model has been experimentally validated by accounting for both regular and irregular waves and varying bathymetry. Experimental results show that the proposed numerical scheme and transfer function modulation method are efficient for the data transfer from the numerical model to the physical model up to a deterministic level.
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| 关 键 词： | 物理模型 数值模型 数值模拟 耦合方程 波传播 Boussinesq方程 拉格朗日插值 调制方法 |
An improved coupling of numerical and physical models for simulating wave propagation |
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| Zhi-wen Yang,Shu-xue Liu,Jin-xuan Li.An improved coupling of numerical and physical models for simulating wave propagation[J].China Ocean Engineering,2014,28(1):1-16. |
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| Authors: | Zhi-wen Yang Shu-xue Liu Jin-xuan Li |
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| Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116023, China
2. Department of Mechanical Engineering, Technical University of Denmark, DK 2800 Kgs., Lyngby, Denmark
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| Abstract: | An improved coupling of numerical and physical models for simulating 2D wave propagation is developed in this paper. In the proposed model, an unstructured finite element model (FEM) based Boussinesq equations is applied for the numerical wave simulation, and a 2D piston-type wavemaker is used for the physical wave generation. An innovative scheme combining fourth-order Lagrange interpolation and Runge-Kutta scheme is described for solving the coupling equation. A Transfer function modulation method is presented to minimize the errors induced from the hydrodynamic invalidity of the coupling model and/or the mechanical capability of the wavemaker in area where nonlinearities or dispersion predominate. The overall performance and applicability of the coupling model has been experimentally validated by accounting for both regular and irregular waves and varying bathymetry. Experimental results show that the proposed numerical scheme and transfer function modulation method are efficient for the data transfer from the numerical model to the physical model up to a deterministic level. |
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| Keywords: | coupling numerical model physical model wave propagation transfer function modulation |
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