Abstract：In this paper, Tthe vibration modes of 1-1-3 composites made from which were prepared by PZT-5H, silicone rubber and epoxy resin were analyzed. Two groups of experimental samples were prepared. 。It is found that the composites haves higher electromechanical coupling coefficient and lower acoustic impedance. The PSV-400 type laser vibrometer was used to measure the vibration shape. The measured results shows that the vibration amplitude of the piezoelectric ceramic column is much bigger than that of the silicone rubber and epoxy resin columns.And Tthe vibration mode of the piezoelectric ceramic column is the k33 mode. The composite material of the structure can fully exert the piezoelectric properties of the piezoelectric cylinder, improve the piezoelectric propertiesy of the whole element, and the vibration mode is more favorable for the composite element to be used in the underwater transducer.
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