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Numerical Simulation of Random Irregular Waves for Wave Generation in Laboratory Flumes | ||
| AUT Journal of Modeling and Simulation | ||
| مقاله 1، دوره 43، شماره 1، تیر 2011، صفحه 1-6 اصل مقاله (214.56 K) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/miscj.2011.140 | ||
| نویسندگان | ||
| Mohammad Janvad Ketabdari؛ Ali Ranginkaman | ||
| چکیده | ||
| Understanding of wave hydrodynamics and its effects are important for engineers and scientists. Important insights may be gained from laboratory studies. Often the waves are simulated in laboratory flumes do not have the full characteristics of real sea waves. It is then necessary to present reliable methods of wave generation in wave flumes. In this paper, the results of numerically simulated water waves using different methods are presented. A model was developed to simulate water wave profile using DSA, NAS and WNDF methods. The results showed that although DSA method provides better agreement between output and target spectra, it is associated with non realistic simulation of sea waves. In the other hand WNDF method involves better stochastic wave characteristics if a qualitative white noise is used. It is also possible to put some controls on wave characteristics as input to WNDF model. | ||
| کلیدواژه‌ها | ||
| Random Irregular Waves؛ DSA Method؛ NSA Method؛ WNDF Method؛ White Noise | ||
| عنوان مقاله [English] | ||
| Numerical Simulation of Random Irregular Waves for Wave Generation in Laboratory Flumes | ||
| چکیده [English] | ||
| Understanding of wave hydrodynamics and its effects are important for engineers and scientists. Important insights may be gained from laboratory studies. Often the waves are simulated in laboratory flumes do not have the full characteristics of real sea waves. It is then necessary to present reliable methods of wave generation in wave flumes. In this paper, the results of numerically simulated water waves using different methods are presented. A model was developed to simulate water wave profile using DSA, NAS and WNDF methods. The results showed that although DSA method provides better agreement between output and target spectra, it is associated with non realistic simulation of sea waves. In the other hand WNDF method involves better stochastic wave characteristics if a qualitative white noise is used. It is also possible to put some controls on wave characteristics as input to WNDF model. | ||
| کلیدواژه‌ها [English] | ||
| Random Irregular Waves, DSA Method, NSA Method, WNDF Method, White Noise | ||
| مراجع | ||
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[1] R. Firoozkoohi, M. J. Ketabdari, (2008): "Design of irregular wave maker for marine laboratory", First Conference of Advances in Marine Industry, Amirkabir University of Technology, Tehran, Iran, 2007. [2] S. O. Rice, (1944): “Mathematical analysis of random noise”, Bell System Tech. J., Vol. 23, 1944 and Vol. 24, 1945. (Reprinted in selected papers on noise and stochastic processes, N. Wax (Ed.), Dover Pub. Inc., New York, N. Y., 1954, pp. 123-144). [3] E. R. Funke, and Mansard, and E. P. D. Dai, G., (1988): “Realisable wave parameters in a laboratory flume”, Proc. 21st Int. Conf. Coastal Eng., ASCE, Vol. 1, pp. 835-848. [4] S. A. Hughes, (1993): Physical models and laboratory techniques in coastal engineering, JBW printers & binders Pte. Ltd., London. [5] H. Gravesen, and T., Sorensen, (1977): “Stability of rubble mound breakwaters”, Proc. 23rd PIANC Conf., Leningrad. [6] D. Brook, and R. J. Wynne, (1988): Signal Processing Principles and Applications", Edward Arnold. [7] J. S. Bendat, and A. G. Piersol, (1986): Random data analysis and measurement, John Wiley and Sons Inc., New York. [8] M. Kendall, and K. Ord, (1986): Time Series, Mc Graw_Hill .Inc. [9] S. Haykin, (1993): Communication Systems, John Wiley & sons Inc [10] K. S. Shanmugan, and A. M. Breipohl, (1998): Random signals – Detection, Estimation, and Analysis John Wiley and Sons, inc. [11] E.R. Funke, and E.P.D., Mansard, (1987):“A rationale for the use of the deterministic approach to laboratory wave generation”, Proc. 22nd Cong. Int. Associated for Hydraulic Res., pp. 153-195. | ||
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