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《中国海洋工程》 1998-02
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Spectral Characteristics of Wind-Waves in Laboratory

LU Hongmin, XU Delun and YU Dingyong Senior Engineer, Physical Oceanography Laboratory, Ocean University of Qingdao, Qingdao 266003, P. R. China. Professor, Physical Oceanography Laboratory, Ocean University of Qingdao, Qingdao 266003, P. R. China. Associate Professor, Engineering College, Ocean University of Qingdao, Qingdao 266003, P. R. China.  
Spectral characteristics of wind-generated waves in labortaory are presented on the basis of a systematic measurement in a large-scale wind-wave channel and compared with those in the field. A marked characteristics of the measured spetra is the existence of secondary spectrum-peak. The dependence of spectral peak- frequency, peak- value and zeroth- order moment on wind speed and fetch are presented and found roughly similar to those in the field represented by the JONSWAP spectrum, regardless of the differences in coefficient. The spectral slope β at high-frequencies are found somewhat greater than those of field wind-waves in both cases of deep and shallow waters. Except for the low-frequency part, the spectral forms measured in different wind conditions are similar and fit for the JONSWAP spectrum with γ= 6 and β= 5.5. Some relevant problems are discussed.
【Fund】: This work was financially supported by the National Science Foundation of China(No.4967277)
【CateGory Index】: P733.1
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