Finite Element Analysis of a Broadband Flextensional Transducer.

摘要

The Class III flextensional transducer is a dual barrel stave design that shows promise as a broadband projector having a potentially useful bandwidth of over three octaves. A simple axially-symmetric finite element model, for use with the computer modelling program, MAVART, has been set up to aid in the optimization of this design. Performance results predicted by the model are compared with measured results for a DREA experimental Class III barrel-stave projector. The model provides a good representation of the performance, the main discrepancy being in the fundamental resonance frequency, which is 10 % lower than measured. The rubber boot, which was not included in the model, is believed to be the primary reason for the discrepancy. This model will be a useful tool for investigation of changes to the Class III BSP. Greater accuracy is expected with the inclusion of the rubber boot in the model.