Fluid-structure coupling in underwater sonar arrays with piston type transducers
✍ Scribed by Y.W. Lam
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 816 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0003-682X
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✦ Synopsis
Using simple numerical techniques, this paper shows that the fluid-structural coupled response of piston type transducers in underwater arrays can be easily determined. Transfer matrix methods are used to establish the equations that describe the structural behaviour of the transducer. Acoustic mutual impedances between transducers are calculated using the Helmholtz integral equations. A matrix equation is then formed coupling the mutual impedance with the structural response of the transducers. The solution of the equation gives the coupled response of the transducers. The technique can be applied to receiver as well as to transmitter arrays and the effect of steering and shading can also be included. The theory is developed for arrays with finite arbitrary baffles with locally reacting surfaces. A more convenient solution of the limiting case of planar arrays in infinite rigid baffles is discussed in detail and is used to simulate the performances of several arrays which are compared to the ideal uncoupled performances. The prediction of the sensitivity of an array is compared with the measurements.