Analysis of the Effect of Reflected Wave from Sonar Dome on Radiation Impedance for Cylindrical Array

概要

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Radiation impedance is one of the very important factors in designing an underwater sonar system. In such a system, transducer array is surrounded by a dome to protect its elements from the underwater environment. In such a case, the effect of a reflected wave on radiation impedance cannot be ignored. To analyze the effect in a cylindrical array, a simplified model was introduced and radiation impedance was calculated by considering the following variables: the separation distance from the reflector ($z$), the interval between elements ($d$), wave number and element size ($ka$), and reflection coefficient ($\Gamma$). It is clarified that the effect of a reflected wave increases with $ka$ and $\Gamma$, with decreasing $z$ and $d$.
2009-07-25