Displacement of Tonpilz at Peak Compression and Tension
The Tonpilz or "Acoustic Mushroom" are able to achieve a combination of low frequency and high sensitivity in a compact footprint which makes them ideal as projectors for sonar applications.
The 3D CAD is a quarter symmetric model of a Tonpilz stack with water load in contact with the head mass. Acoustic outputs such as Transmit Voltage Response and Directivities can be extracted from the simulation very easily using our Post Processor.
The base CAD model was created in Onshape and allows the following design variables to be adjusted. By default the number of piezoelectric layers, the piezoelectric thickness, and the bolt length are added as configuration variables for quick access through the Configuration Panel in Onshape. There are also two different head shapes available: Cylindrical and Hexagonal.
|Parametric Variable||Description||Default Value|
|#pzt_radin||Piezoelectric ring inner radius||2 mm|
|#pzt_radout||Piezoelectric ring outer radius||4 mm|
|#pzt_thick||Piezoelectric ring thickness||2 mm|
|#ncer_layers||Number of Piezoelectric layers||6|
|#bolt_length||Center bolt length||21 mm|
Here are a list of the types of outputs to expect from this model:
- Electrical Impedance and Admittance
- Mode Shapes (Harmonic Analysis) of base design
- Transmit Voltage Response
Post Processor 3D Outputs
|Model size||247408 elements|
|Solve Time||100 s (4 CPU)|
|Memory Usage||32 MB|
|Recommended CPU Configuration||4 CPU|
CAD Project File
The following project file is required to run this model:
The base CAD model is publicly available to view and copy through Onshape: