【摘要】 本文使用渤海石油平台观测的超声波风速脉动资料,计算了强风条件下二维风速和风向的最大熵谱和傅立叶功率谱。结果表明,在不稳定条件下,海上大气湍流能量主要集中在风扰动的低频段,随着风速的加大,高频扰动的贡献逐渐增加;纵向风速具99s的主振荡周期,侧向风速和风向具同一谱型,它们的主振荡周期为132s。结果还指出了不同特性的气团具不同的大气湍流特征。更多还原

【Abstract】 Using the data set of the wind fluctuation measured by the ultrasonic anemometer on the oil platform in the Bohai Sea, the spectra of 2-dimension wind velocity and wind direction were calculated. The results show that the energy of the atmopheric turbulence mainly occurs in the low frequency band and the contribution of the fluctuation at the high frequency increases as velocity increases; the dominant period of the longitudinal wind velocity is around 99 seconds, and the spectra patterns of the lateral wind velocity and wind direction are almost same with 132 seconds period. The results also show that the different air masses have different turbulent characteristics.更多还原