Housing resonances can significantly affect device performance, in particular at frequencies below 20 kHz where wideband hydrophones and parametric arrays can operate. Resonances can be difficult to predict and may only be detected late in the design cycle. With PZFlex’s highly efficient electro-mechanical solver, ability to generate multi-million element models and wideband results from a single run, it allows complex designs to be analysed in very quick time frame.
The 2D and 3D Sonar device examples demonstrate the process of analysing the transducer performance to determine the exact frequencies of housing resonances. Acoustic outputs such as sensitivities (TVR and OCV) and directivity plots can all be extracted from the model to isolate problem areas over the operational bandwidth.