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波致应力的近似求解及其太平洋特征分析
王倩,宋金宝,曹海锦,乔文丽
作者单位E-mail
王倩 浙江大学 qianwang1208@163.com 
宋金宝 浙江大学 songjb@zju.edu.cn 
曹海锦 河海大学  
乔文丽 浙江大学  
摘要:
基于波致应力计算中对海浪谱和波浪增长率公式的敏感性分析,选择适当的波致应力近似求解方法,计算和探讨了太平洋波致应力的时空分布特征。敏感性分析中,选择了4种常用的波浪增长率公式和3种经验解析海浪谱。推导了计算波致应力的单波公式,并将其与JONSWAP谱积分公式和Elfouhaily谱积分公式进行比较,同时使用了由风速和有效波高资料构造的Elfouhaily谱积分公式计算太平洋波致应力。结果表明:Belcher and Hunt的波浪增长率计算公式估算的波致应力与实验数据吻合度较好,同时适用ERA中期的数据;当波龄小于1.2时运用Elfouhaily谱积分公式更合适,当波龄大于1.2时运用单波公式更快速有效;太平洋的波致应力分布与风场之间存在明显的相关性;2009年1月、4月、7月和10月太平洋波致应力的季节性特征分析表明四个季节的西风带波致应力较其它地区都更为强盛,而在时间变化上1月和10月为波致应力整体较为强盛的时期。
关键词:  波致应力  单波公式  波浪增长率  海浪谱  太平洋
DOI:10.11693/hyhz20170900242
分类号:
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
Approximate Estimation of Wave-induced Stress and its Characteristic Analysis in the Pacific
WangQian,Song Jinbao,Cao Haijin,Qiao Wenli
Abstract:
Based on the sensitivity analysis of the wave-induced stress on the wave spectrum and the wave growth rate formulations, one appropriate estimation method of the wave-induced stress is picked out for calculating anddiscussingof the spatial and seasonal characteristics of the wave-induced stress across the whole Pacific. Four frequently used wave growth rate formulas and three empirical analytic wave spectrum are selected in the sensitivity analysis.A monochromatic wave approximation of the wave induced stress is proposed and comparedboth with JONSWAP spectral integral formula and Elfouhaily spectral integral formula. Elfouhaily spectral which constructed by the wind speed and effective wave height data is used to calculate wave-induced stress in the Pacific.The research shown that the wave-induced stress calculated using the wave growth rate formula proposed by Belcher and Hunt is in best agreement with the existed experimental data and suits for ERA-Interim data; Elfouhaily spectral integral formula is better when the wave age is less than 1.2. While if the wave age is greater than 1.2, the monochromatic wave approximation is suitable and fast; There is aobvious correlation between the distribution of the wave stress and the wind field in the Pacific; Characteristics of wave-induced stress in January, April, July and October of 2009 in the Pacific indicate that the wave-induced stress in the westerly belt is stronger than other areas for all four seasons. While in time, the wave-induced stress is more powerful in January and October.
Key words:  wave-induced stress  monochromatic wave formula  wave growth rate  wave spectrum  The Pacific
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