| 摘要: |
| 孙孚等(1994)提出了外频谱的概念,并推导出外频谱的理论形式,但其控制参量是由内频谱导出的,不便于实际应用。通过对实测海浪数据的分析,得到了控制外频谱的3个和内频谱有关的参量与波浪要素之间的关系,进而将外频谱表示为以有效波高和有效波周期作为控制参量的形式。应用实测资料将本文得到的外频谱形式与理论外频谱进行了比较,发现二者符合良好。 |
| 关键词: 外频谱 有效波高 有效波周期 |
| DOI：10.11693/hyhz200006015015 |
| 分类号: |
| 基金项目:国家自然科学重点基金资助项目，49336330号;高等学校重点实验室访问学者基金资助 |
附件 |
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| APPARENT ENERGY SPECTRA OF SEA WAVES REPRESENTED BY WAVE CHARACTERISTICS |
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DAI De-jun, WANG Zhong, WANG Wei
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Physical Oceanography Laboratory,Ocean University of Qingdao,Qingdao,266003
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| Abstract: |
| The apparent energy spectra of sea waves (hereafter referred to as outer spectrum) presented by Sun Fu in 1994 is claimed capable of substituting the general frequency spectra (hereafter referred to as inner spectrum) for practical use. However, three parameters (m0, m1, v) of the outer spectra should be derived form the corresponding inner spectra, which confines the usage of outer spectra in practice. Considering that in physical sense the outer spectra represents the energy distribution of sea waves over apparent frequency, it should be feasible to use wave characteristics such as significant wave height (H1/3) and significant wave period(T1/3) to express the outer spectra. From this point of view, the relations of m0, m1, v to H1/3, T1/3 and R (R is proportional to wave steepness) were obtained from a large number of field wave data, whose mean periods are above 2.0s and inner spectra have a single peak. Finally, a new type of outer spectra represented by wave characteristics is achieved, and it is consonant well with the theoretical form of Sun Fu for all data used in the paper. |
| Key words: Apparent energy spectrum, Significant wave height, Significant wave period |
