access icon free Minimum length of damping section for towed array based on revised Paidoussis equation

Most of the non-acoustic methods for towed array shape estimation are based on the incorrect original Paidoussis equation. A comparison between solution to the original and revised Paidoussis equation is made to prove the significance of utilising the latter. In addition, considering relative characteristics of the revised Paidoussis equation and the critical point which exists on the cylinder, the minimum length of damping section added at the end of the cylinder is derived.

Inspec keywords: array signal processing; hydrodynamics; damping; differential equations; hydrophones

Other keywords: nonacoustic methods; towed array shape estimation; minimum damping section length; revised Paidoussis equation

Subjects: Signal processing and detection; Vibrations and shock waves (mechanical engineering); Mathematical analysis; Mathematical analysis; Fluid mechanics and aerodynamics (mechanical engineering)

References

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      • 6. Paidoussis, M.P., Grinevch, E., Adamovic, D., Semler, C.: ‘Linear and nonlinear dynamics of cantilevered cylinders in axial flow. Part 3: nonlinear dynamics’, J. Fluid Mech., 2002, 16, pp. 739759.
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      • 2. Kennedy, R.M., Strathan, E.S.: ‘A linear theory of transverse cable dynamics at low frequencies’, NUSC Technical Report, 1981, 6463.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.0882
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