2024-03-29T12:37:29Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/606402017-11-28T09:36:30Zcom_10261_32com_10261_4col_10261_285
00925njm 22002777a 4500
dc
Iula, A.
author
Vázquez Martínez, Fernando
author
Pappalardo, M.
author
Gallego Juárez, Juan Antonio
author
2002
The vibrational behaviour of the Langevin transducer is usually analysed using 1D Mason model which is valid when the lateral
dimensions of the transducer are smaller than a quarter wavelength at the fundamental longitudinal resonance. In this work a 3D
finite element analysis of the Langevin transducer’s behaviour operating in the underwater sonar range of frequencies (30–140 kHz)
is presented. Several samples with total length greater, comparable to, and smaller than the diameter of the transducer are analysed.
For each sample, the resonance frequencies in the observed frequency range are computed and compared with those obtained
experimentally from the measurements carried out using several in-house built prototypes. For the most important aspect ratios the
resonance displacement distributions are presented and discussed. The results obtained permit to gain insight into the coupling
phenomenon between thickness-extensional and radial modes and suggest that in practical applications transducers with diameters
comparable to or greater than total length of the active stack can also be used. The trade-off between the efficiency and power
handling ability for different designs is also discussed.
Ultrasonics 40 : 513-517 (2002)
0041-624X
http://hdl.handle.net/10261/60640
10.1016/S0041-624X(02)00174-9
1874-9968
Langevin transducer
FE analysis
Finite element three-dimensional analysis of the vibrational behaviour of the Langevin-type transducer