Accession Number : AD0451430


Title :   DYNAMIC COUPLING COEFFICIENTS FOR DISTRIBUTED PARAMETER PIEZOELECTRIC TRANSDUCERS


Corporate Author : NAVY UNDERWATER SOUND LAB NEW LONDON CT


Personal Author(s) : Marshall, William J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/451430.pdf


Report Date : Oct 1964


Pagination or Media Count : 36


Abstract : This report discusses a definition of the effective coupling coefficient for the body-force class of electromechanical transducers. This definition is based on the distribution of energy in the transducer and is therefore particularly applicable to the distributed parameter type of transducer. Furthermore, the definition results in a frequency dependent coupling coefficient which is valid for all models of vibration. The definition is applied to some common types of longitudinal vibrator and the results are compared with experiments for one particular device (a partially excited stack of ceramic disks). The influence of parasitic elements on the system coupling is also examined.


Descriptors :   *SONAR TRANSDUCERS , *PIEZOELECTRIC TRANSDUCERS , *MAGNETOSTRICTIVE ELEMENTS , MATHEMATICAL ANALYSIS , DIFFERENTIAL EQUATIONS , VIBRATORS(ELECTRICAL) , COUPLING CIRCUITS , TRANSDUCERS , INTEGRAL EQUATIONS


Subject Categories : Mechanics
      Acoustic Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE