| A MODIFIED HYBRID ELEMENT MODEL FOR COMBINED DIFFRACTION-REFRACTION-REFLECTION-DISSIPATION WAVES OVER LARGE REGIONS |
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| 作者姓名： | 张黎邦 |
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| 作者单位： | First Inst. of Oceanography，SOA，Qingdao 266003 |
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| 基金项目： | Supported by a grant from the NSFC |
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| 摘 要： | A modified hybrid element method (MHEM) including diffraction, refraction, reflection and dissipa-tion effects is developed to model wave transformation over large complex bathymetry under practical bo-undary conditions. Adoption of a simple functional in the MHEM dispenses with the additional unknownsin simultaneous equations of the conventional hybrid element method (HEM). In this paper incompleteCholeski & conjugate gradients (ICCG) algorithm is used to save computer CPU operation time and storagespace; so calculation of wave information in large an area can be carried out on PC computers. Also, theMHEM grid can be controlled by computer using local wavelength. The validity and efficiency of MHEM areconfirmed by comparisons verifying that the MHEM can proviide numerical solutions with very good accuracy.
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| 收稿时间： | 19 January 1995 |
| 修稿时间： | 27 August 1995 |
A modified hybrid element model for combined diffraction-refraction-reflection-dissipation waves over large regions |
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| Zhang Li-bang.A MODIFIED HYBRID ELEMENT MODEL FOR COMBINED DIFFRACTION-REFRACTION-REFLECTION-DISSIPATION WAVES OVER LARGE REGIONS[J].Chinese Journal of Oceanology and Limnology,1996,14(1):68-78. |
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| Authors: | Zhang Li-bang |
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| Institution: | (1) First Inst. of Oceanography, SOA, 266003 Qingdao;(2) Present address: Ocean Engrg. Program, Texas A & M Univ., 77843 College Station, TX, USA |
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| Abstract: | A modified hybrid element method (MHEM) including diffraction, refraction, reflection and dissipation effects is developed to model wave transformation over large complex bathymetry under practical boundary conditions. Adoption of a simple functional in the MHEM dispenses with the additional unknowns in simultaneous equations of the conventional hybrid element method (HEM). In this paper incomplete Choleski & conjugate gradients (ICCG) algorithm is used to save computer CPU operation time and storage space; so calculation of wave information in large sea area can be carried out on PC computers. Also, the MHEM grid can be controlled by computer using local wavelength. The validity and efficiency of MHEM are confirmed by comparisons verifying that the MHEM can proviide numerical solutions with very good accuracy. |
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| Keywords: | MHEM ICCG algorithm wave information |
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