2025/06/03 by Manz, Yannik, Storck, Heiner, Gerlach, André +1
#Electronic Engineering #Natural Sciences and Mathematics::530: Physics #Technology::621: Applied Physics::621.3: Electrical Engineering #transducer arrays | coupled oscillators | forced vibration | localization | curve veering | modal superposition
paper · doi:10.15480/882.15215
In transducer arrays, symmetric grouping of identical elements is often employed to achieve uniform array performance. Such arrays can possess high coupling, preventing localized operation of individual transducers. This paper provides insight into how forced vibration localizes in a symmetric system of coupled oscillators. We use a simple lumped-parameter model of highly coupled oscillators derived from ultrasound transducer arrays. Forced vibration localization can be shown to be inversely related to the coupling strength between the oscillators. The results demonstrate how forced vibration in a coupled symmetric system may localize through modal superposition and how it may be tuned via the spacing of natural frequencies. Breaking the system’s symmetry leads to normal mode localization, which can be shown to affect the forced vibration response. The results reveal a variation in the system’s resonance frequency, attributed to curve veering effects.