Class IV Flextensional Transducers
The class IV flextensional transducer has attracted considerable interest over the past two decades and the emerging technology has been broad based and highly innovative. Progress has been made in solving the fundamental design limitations and comprehensive well proven analytical and finite element models have been developed and published. The evolving practical technology has often been cloaked in commercial confidentiality but Defence Technology Enterprises (DTE) decided to market ARE flextensional technology to industry three years ago. Companies have also invested in R&D and some are now publishing the often unique attributes of their designs as well as acoustic performance information. It is intended to use this information as the basis of a review of current state of the art technology. Initially design limitations are identified, followed by a more detailed discussion on the choice of shell materials and their effects on performance and cost. An overview of novel depth compensation methods, and the design of flextensional transducers for low cost expendable applications are also included.
KeywordsCarbon Graphite Shell Material Bias Stress Major Axis Length Flexural Disc
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