An experimental study of hydroelastic instability of flexible towed underwater cylindrical structures
An experimental study of hydroelastic instability of flexible towed underwater cylindrical structures
- New search for: Sudarsan, K.
- New search for: Bhattacharyya, S.K.
- New search for: Vendhan, C.P.
- New search for: Sudarsan, K.
- New search for: Bhattacharyya, S.K.
- New search for: Vendhan, C.P.
This paper reports an experimental study of hydroelastic instability of flexible towed underwater slender cylinders carried out in a towing tank. Three models of length to diameter (slenderness) ratios of 50 and 150 made of nylon and rubber were used as test specimens. The drag coefficients were measured and compared with the results in the literature. The critical tow speeds, the modes of instability and the associated frequencies were obtained from video records. These results were compared with theory which is well known. The studies revealed two types of instabilities, namely yawing (rigid body motion) and flutter (oscillatory) instabilities for a towed-free cylinder and divergence (buckling) instability for a clamped-free cylinder. The quality of comparisons between theory and experiments represents a significant improvement over earlier results. Instability suppression devices, e.g. tail rope, disc and conical drogue were attempted to find their effectiveness and these results were also compared with theory.
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An experimental study of hydroelastic instability of flexible towed underwater cylindrical structures
Experimentelle Untersuchung der hydroelastischen Instabilität flexibler unter Wasser geschleppter zylindrischer Strukturen
1997
8 Seiten, 9 Bilder, 8 Tabellen, 13 Quellen
Conference paper
English
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