内波观测浮标水动力性能分析与实验研究

Analysis and experimental research on hydrodynamic performance of internal wave observation buoy

内波观测浮标的横摇和纵摇是影响海流观测设备声学多普勒流速剖面仪(ADCP)观测有效性的重要参数。针对所设计的浮标,采用AQWA软件,分析比较了在不同外界载荷下,浮标的横摇和纵摇变化情况。结果表明:在1 m浪高的规律波浪下,周期为4~16 s时,浮标的横摇和纵摇角度均满足仪器有效观测的要求,周期为1~3 s时,浮标会产生较大的横摇和纵摇角度;在不规律波浪下,当波浪高度小于4 m时,浮标运动的有义值都满足要求,当波浪高度大于等于5 m时,浮标的横摇或纵摇角度会超过20°。在南海进行的内波观测实验表明,横摇和纵摇角度均满足有效观测的要求,证明模拟是准确的。

The roll and pitch of the internal wave observation buoy are important parameters that affect the effectiveness of ADCP observations by ocean current observation equipment.Aiming at the designed buoy,it uses AQWA software to analyze and compare the roll and pitch changes of the buoy under different external loads.The results show that:under a regular wave with a wave height of 1 m,when the period is 4~16 s,the roll and pitch angles of the buoy meet the requirements of the instrument for effective observation;when the period is 1~3 s,the buoy produces a larger roll.And the pitch angle;under irregular waves,when the wave height is less than 4 m,the meaningful value of the buoy movement meets the requirements,and when the wave height is 5 m,the roll or pitch angle of the buoy will exceed 20°.In order to verify the accuracy of the simulation,an internal wave observation experiment is carried out in the South China Sea,and its attitude in the sea is analyzed.During the observation period of one month,the roll and pitch angles meet the requirements for effective observation.