摘要
本文以实测台风波浪资料为依据,分析了台风影响过程中固定点波型的演变,讨论了台风过程波浪的波陡与波型、风速与波型、波高与风速和波向与风向之间的关系.从而得出,在受台风直接影响的海区内,台风影响过程中出现较大波浪时的波型属于风浪,不同重现期台风波浪的波型也属于风浪的结论.本文以大亚湾海滨区的100年重现期设计波浪要素的计算为例,讨论了台风波浪的波型与设计波浪要素的取值关系.
Based on data of wave observation, this paper analyses the change of wave pattern on the site during the typhoon period. According to the significant wave steepness of W.C.Thompson tt al.GR = HR\LR, E.Bows'dimensionless parameterand the maximum directional concentration parameter pointed out by Yo-shimi GodaSm0 = 11.5(2π fm U\g)-2:5,the relation between wave steepness and wave pattern, wind speed and wave pattern is analysed. From statistics of typhoon wave data, the wave characteristics are obtained. It is concluded that in the typhoon area, the larger waves occurring during the typhoon period at a solid point are of the winddriven wave pattern.For calculation of wave parameter for coastal engineering, the relation between wave height and wind speed, wave direction and wind direction is analysed, and the question of a sample typhoon wave pattern is discussed. Next a conclusion is rtached that the 100 year return period typhoon waves are also of the wind-driven wave pattern.The designing parameter for waves of the 100 year return period is calculated for Daya Bay seashore area. By using Yoshimi Goda's calculation oi irregular waves, the ratio of wave height inside and outside Daya Bay obtained is as following.0.62 (Sm0 = 10, for wind wave)0.78 (Sm0 = 25, for swell with short to medium decay distance) 0.84 (Sm0 = 75, for swell with medium to long decay distance) Based on data of observed typhoon waves in Daya Bay, it is shown that it is suitable to calculate designing parameters of waves by using wind wave patterns of the area directly effected by typhoon.
出处
《热带海洋学报》
CAS
1988年第3期45-53,共9页
Journal of Tropical Oceanography