Wave direction analysis from data buoys
Wave direction analysis from data buoys
复制标题
数据浮标的波浪方向分析
DOI：
10.1016/s0029-8018(97)00036-x
复制
发表时间：
1998
影响因子：
5
通讯作者：
Jia
中科院分区：
文献类型：
--
作者：
Min;Jia
本文介绍了一种利用纵摇浮标测量资料进行定向波分析的新方法。国家数据浮标中心（NDBC）采用的前两个程序[Steele，K。E、刘杰杰K.和Hsu，Y.- H. L.（1985）NDBC定向波浪测量浮标校准技术的理论和应用。IEEE Journal of Oceanic EngineeringOE-10（4），382-396; Steele，K. E、Teng，C.- C.和Wang，D. W. C.（1992）使用俯仰-滚转浮标测量波浪方向。Ocean Engineering 19（4），349-375]与我们的配方有关。在这两项研究中，从测量的浮标升沉/俯仰和升沉/横摇谱的海面位移/斜率谱的总相移的估计计算通过加权平均法或最大升沉/俯仰四谱法。这两个公式是基于对称船体系泊对纵摇和横摇运动的影响的基本假设，这在海洋中永远不会成立。在本研究中，我们基本上将NDBC的基本配方，但计算两个估计，这个总相移。本文介绍了在台风Herb期间，用直径3米的铁饼浮标观测资料进行方向波分析的实例。该数据集也进行了分析，在严重的波浪气候的波浪方向的加权平均法，产生不满意的结果。
This paper describes a new procedure of directional wave analysis from pitch–roll buoy measurements. The two previous procedures adopted by the National Data Buoy Center (NDBC) [Steele, K. E., Lau, J. C. K. and Hsu, Y.-H. L. (1985) Theory and application of calibration techniques for an NDBC directional wave measurement buoy. IEEE Journal of Oceanic EngineeringOE-10(4), 382–396; Steele, K. E., Teng, C.-C. and Wang, D. W. C. (1992) Wave direction measurements using pitch–roll buoys. Ocean Engineering19(4), 349–375] are relevant to our formulations. In these two studies, an estimate for the total phase shift of the sea surface displacement/slope spectra from the measured buoy heave/pitch and heave/roll spectra was calculated either by a weighted average method or a maximum heave/pitch quad-spectrum method. These two formulations were based on a fundamental assumption of symmetric hull-mooring effect on pitch and roll motions, which will never be true in the oceans. In the present study we essentially incorporate the basic formulations of NDBC, but calculate two estimates for this total phase shift. Examples of directional wave analysis from data measured by a 3m diameter discus buoy during Typhoon Herb are presented in this paper. This data set was also analyzed by the weighted average method of which yielded unsatisfactory results of wave directions during severe wave climates.