The basis of fiber optic hydrophone(FOH) system is FOH probe
the probe natural frequencies and modes have direct influences on the dynamic response characteristics of the hydrophone
such as amplitude-frequency curve features
response range and bandwidth.The free vibration characteristics of bar-type FOH probe are analyzed.The fundamental frequency is derived from Rayleigh method
the influences on fundamental frequency are analyzed comprehensively.ANSYS simulation is employed to analyze the natural frequencies and modes of the FOH probe
results are agree well with theoretical calculation