东洞庭湖最大熵法风浪谱估计  

Wind wave spectrum estimation of small generating area by the maximum entropy method

作　　者：沈小雄[1] 王常民[1] 连石水[2] 李胜超[1] 

机构地区：[1]长沙理工大学水利学院,湖南长沙410076 [2]交通部第四航务工程勘测设计院,广东广州510230

出　　处：《长沙理工大学学报（自然科学版）》2007年第1期39-43,共5页Journal of Changsha University of Science and Technology:Natural Science

基　　金：湖南省洞庭湖工程管理局科研资助项目(DTHYJH-KY-2005-007)

摘　　要：根据东洞庭湖风浪观测资料,分析了最大熵法估计风浪谱(MEM)的谱型曲线的影响因素.研究结果表明,MEM法提高了谱估计的精度,对于较短的序列也能得到较好的谱估计结果.由最终预报误差准则(FPE准则)确定最大熵谱的阶数M,得到了东洞庭湖小风区风浪谱的估计公式以及波浪要素与谱的关系式.利用该公式计算的结果与实测值比较,符合良好.MEM（Maximum Entropy Method） is a new method for estimating wind wave spectrum. There is little research result about wind wave spectrum in Dongting Lake. In this paper,based on the field data of wind wave of small wind area in Dongting Lake for two months,the effect of some factors on power spectrum estimated by MEM is analyzed. MEM has a better resolution and gives more realistic power estimation,especially for short data records. M-order of MEM is determined according to FPE （Final Predict Error） rule and a formula of power spectrum estimation of small area in Dongting Lake is proposed. The relationship between wave height and speetrum is also obtained. Compared with the field data, the result estimated by MEM almost leads to the same result.

关 键 词：风浪谱 最大熵法 湖泊 

分 类 号：TV139.24[水利工程—水力学及河流动力学]