为研究水池条件下甚低频矢量水听器的校准方法,利用水池声场理论建模仿真的方法研究了声源位置、水池尺寸等因素改变时近源声场的变化规律.研究表明:在连续信号激励条件下,近源声场分布呈准球面波扩展规律,满足甚低频矢量水听器的校准需求.进而详细阐述了校准方法并仿真评估了标准水听器和待测甚低频矢量水听器所在位置的声场对校准结果的影响.为水池条件下甚低频矢量水听器的校准提供了指导,拓展了甚低频矢量水听器的校准思路.%In order to study the method of calibrating the very low frequency ( VLF) vector hydrophone in water tank, regularity for change of the near-source field is studied through numerical modeling for the sound field in water tank, considering the influence of source position, water tank size and so on. The study indicates that the near field excited by a continuous signal is characterized as a quasi-spherical wave, and can be used to calibrate VLF vector hydrophone. Besides, the study presents the calibration method in detail and evaluates the sound field for standard and tested VLF hydrophones and its impact on calibration results. The results provide some directive suggestions for vector hydrophone calibration and can also inspire new idea for VLF calibration.
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