Accession Number : AD0664482

Title :   FLEXURAL VIBRATIONS OF BEAMS WITH FLEXIBLE BOUNDARY CONDITIONS,

Corporate Author : NAVY UNDERWATER SOUND LAB NEW LONDON CONN

Personal Author(s) : LeBlanc,Charles L.

Report Date : 04 DEC 1967

Pagination or Media Count : 36

Abstract : Because of the modern trend toward low-frequency sound sources, flexural vibrators, in the form of beams and plates, are finding widespread use in sonar applications. In order to effectively use these vibrators as efficient and reliable transducers, it is essential that the structures be mechanically stable, necessitating the use of support mechanisms. Therefore, a theoretical investigation was undertaken to determine the effects of non-ideal support conditions on the flexural vibrations of beams. The fundamental resonance, the mode shape, the stress distribution, and the effective electromechanical coupling coefficient ratio, based on an energy distribution in the composite structure, are derived for a practical transducer configuration employing a lead zirconate titanate (PZT-4) ceramic body. Variations in these parameters are described in a general sense in terms of the dimensions and material constants of the central ceramic section of the beam. (Author)

Descriptors :   (*TRANSDUCERS, ACOUSTIC EQUIPMENT), (*BEAMS(STRUCTURAL), VIBRATION), SUPPORTS, STABILITY, EQUATIONS OF MOTION, BOUNDARY VALUE PROBLEMS, VIBRATORS(MECHANICAL), RESONANT FREQUENCY, DEFORMATION, ELECTROMECHANICAL CONVERTERS, DIFFERENTIAL EQUATIONS, CERAMIC MATERIALS

Subject Categories : Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE