Cover of: The strumming vibrations of marine cables | Owen M. Griffin

The strumming vibrations of marine cables

state of the art
  • 89 Pages
  • 2.51 MB
  • English
Naval Civil Engineering Laboratory , Port Hueneme, Calif
StatementO. M. Griffin ... [et al.]
SeriesNCEL Technical note -- N-1608, Technical note (Naval Civil Engineering Laboratory (Port Hueneme, Calif.)) TN -- N-1608.
The Physical Object
Pagination89 p. :
ID Numbers
Open LibraryOL24364692M

The strumming vibrations of marine cables: state of the art by Griffin, Owen M. Publication date Topics Ocean engineering, Cables Publisher This book is available with additional data at Biodiversity Heritage Library. plus-circle Add Review.

comment. ReviewsPages: The strumming vibrations of marine cables: state of the art / By. Griffin, Owen M. Publication Details. Port Hueneme, Calif.:Naval Civil Engineering Laboratory, Holding Institution.

MBLWHOI Library. If you are generating a PDF of a journal article or book chapter, please feel free to enter the title and author information. The strumming vibrations of marine cables: state of the art / Related Titles. Series: Technical note (Naval Civil Engineering Laboratory (Port Hueneme, Calif.)) TN ; N By.

Griffin, Owen M. Type. Book. Material. Published material. Publication info. The vortex-excited oscillations of marine cables, commonly termed strumming, result in early fatigue, increased hydrodynamic forces and amplified acoustic flow noise; they sometimes lead to struc- tural damage and possibly to failure.

Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): ersitylibrar (external link)Cited by: 3. The strumming vibrations of marine cables: state of the art / By Owen M. Griffin Topics: Cables, Ocean engineering.

INTRODUCTION The vortex-excited oscillations of marine cables, commonly termed strumming, result in early fatigue, larger hydrodynamic forces and amplified flow noise, and sometimes lead to struc­ tural damage and eventually to costly failures.

Vortex-Induced Strumming Vibrations of Marine Cables With Attached Masses O. Griffin, Twenty full-scale test runs were conducted during the cable strumming experiments reported in this paper.

These consisted of ten pairs of equivalent tests conducted in air and in water with a cable fitted with arrays of attached masses. Impacts of submarine cables on the marine environment - A literature review.

Institute of Applied Ecology Ltd. Contents V. a receiver at 50 metres depth (or at the sea-bottom where the water is shallower). Noise levels are unweighted, broadband sound pressure levels. cable The strumming vibrations of marine cables book are fretting corrosion which is induced by micro oscillatory motion due to vibration and thermal fluctuation.

To do so a serie of experimental studies has been conducted for different samples of electrical connectors. Keywords Contact resistance, Electrical. The prediction of the strumming response of a cable to vortex sheeding may be thought to consist of four major components: a structural model, an excitation model, a damping model, and an analysis method7.

In this work the emphasis is on the improvement of struc- tural models. Marine and Offshore Cables Unarmoured Single-Core Cables to BS TAC. EPR. SW4 / V Application Unarmoured cable for use where mechanical protection is not required for fixed wiring in ships and in mobile and fixed offshore units (e.g.

drilling rigs, oil platforms, etc.). “A Field Study of Vortex-Excited Vibrations of Marine Cables” Offshore Technology Conference, Paper OTCDallas, Texas, Abstract: A variety of cables were studied under controlled conditions in the ocean. Sections of cable, ft in length, were exposed to a spatially uniform, time-varying current.

3. VORTEX EXCITATION OF CABLE SYSTEMS The vortex-induced oscillations of cable systems are commonly referred to as strumming.

By far the greatest concern with cable strumming has been in marine applications and these will be the subject of the following discussion.

Typical applications of marine cable systems are illustrated in Fig.

Description The strumming vibrations of marine cables FB2

The heart of our classification organization, ABS Rules & Guides are derived from principles of naval architecture, marine engineering and related disciplines. Currently, ABS has more than Rules, Guides and Guidance Notes available for download or purchase through the online catalog. Vortex-Excited Vibrations of Marine Cables.

Recent experiments to study vortex-excited cable strumming in towing basins and at field sites are compared in this paper to small-scale laboratory experiments. The resonant cable strumming displacements and frequencies measured during the towing basin experiments with several m long cables are in good agreement with laboratory.

Analytical studies of vortex-induced vibration (VIV) of cables during lock-in have considered small amplitude and relatively fast dynamic responses about an equilibrium configuration.

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Nonacoustic self‐noise observed on marine seismic streamers and towed sonar arrays represents a serious problem for acoustic source detection at low frequency. Towed array self‐noise, also known as cable strum, consists of mechanical vibrations induced by vortex shedding.

Transverse vibrations in the array body subject each hydrophone pressure head to local accelerations. The problem of vortex-induced vibrations in flexibly mounted cylinders and marine cables is addressed using a new laboratory apparatus, which combines force-feedback with on-line numerical simulation of a modeled structure.

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Details The strumming vibrations of marine cables FB2

Shakedown Lines Similar effect to braided hair fairings, we offer extruded “shakedown” jackets which address the adverse effects of strumming / vibration and reduces cable noise and drag. Bare cable towing induces cable vibration known as strumming, which is detrimental to both the life cycle of the cable and the efficiency of the tow operation.

Hairy fairings improve this efficiency, but only marginally. The smooth, hydrodynamic design of the TufLine and. 8 Isolator, Vibration 2 9 Coupling, Plain Hose 1 10 Hose, Flexible 1 11 Coupling, Elbow Hose 1 12 Hose, Elbow 1 13 Tube, Water Transfer 1 14 Heater, Engine 1 15 Elbow, Male Adapter 2 .vibration In reading books and technical papers on vibration including the previous paragraph, vibration scenario, the cable might be idealized as massless and the crane idealized as rigid.

In. ME Mechanical Vibrations Fall this simple case, the package and crane both oscillate as rigid bodies; the package oscillates about.In simplest terms, vibration in motorized equipment is merely the back and forth movement or oscillation of machines and components, such as drive motors, driven devices (pumps, compressors and so on) and the bearings, shafts, gears, belts and other elements that make up mechanical systems Missing: marine cables.