2025_programme: Modeling of acoustical transducers using electrical network theory

• Day: June 19, Thursday
    Location / Time: B. ERATO at 15:10-15:30
• Last minutes changes: -
• Session: 16. Sonar performance modeling and verification: Active and passive sonar
  Organiser(s): Mathieu Colin, Kevin Heaney
  Chairperson(s): Mathieu Colin, Jonas-Halse Rygh
• Lecture: Modeling of acoustical transducers using electrical network theory [Invited]
  Paper ID: 2356
  Author(s): David A Brown
  Presenter: David A Brown
  Abstract: Modeling of piezoelectric acoustic transducers involves the transformation of electrical energy to mechanical and acoustic energy or vice versa, thus solving problems in the electrical, mechanical, acoustical radiation domains. Aronov introduced the technique of using generalized coordinates and Lagrangian mechanics for underwater electroacoutics, in which principle of least action is applied in each electrical, piezoelectric, mechanical and sound radiation domains, wherein each can be solved separately and then combined in a multi-contour equivalent electro-mechanical circuit with each mechanical vibrational resonant modes representing separate degrees of freedom in the coupled electrical circuit. This energy approach involves the calculation of the potential and kinetic energies of each “practical” mode of vibration, that can be determined analytically, experimentally, or by finite-element-analysis. This is an alternative to using Newtonian mechanics where accurate description of the real boundary conditions may be illusive, the later approach remains common in FEA modeling approaches. However, the equivalent electrical-mechanical circuit approach (or networks approach in the case of multi-resonant devices) is often more physically insightful, quicker once the model is development, and useful since in the end, an analytical description of the electrical load that the transducer presents to the amplifier is often what is required for subsystem performance estimation. Several examples of piezoceramic transducers are presented.
• Corresponding author: Prof David A Brown
  Affiliation: Univesity Massachusetts Dartmouth
  Country: United States