COMPUTER SIMULATION OF DYNAMICS OF UNDERWATER CABLE WITH LOAD AT THE END

 cover 3 20 2018

COMPUTER SIMULATION OF DYNAMICS OF UNDERWATER CABLE WITH LOAD AT THE END

V.A. Leont'ev
PhD in Physics and Mathematics, Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Senior Research Scientist, 21, Tikhoretsky pr., Saint-Petersburg, 194064, Russia, tel.: +7(812)297-30-58, This email address is being protected from spambots. You need JavaScript enabled to view it. , This email address is being protected from spambots. You need JavaScript enabled to view it.

B.A. Smolnikov
PhD in Physics and Mathematics, SPbPU, Professor, Senior Research Scientist, 29, Politekhnicheskaya ul., Saint-Petersburg, 195251, Russia, tel.: +7(812)552-77-78, This email address is being protected from spambots. You need JavaScript enabled to view it.


Received 30 July 2018

Abstract
In this paper, a computer model simulating the movement of a deep-water cable (buoyrap) with end's load, in the case of uniform and non-uniform towing, is presented. Catenary curve of buoyrap in the steady-state fluid flow found in the computer modelling is compared with its analytical representation. For steady motion, it is shown that the analytical calculation of this curve coincides with high accuracy with the results of computer simulation carried out by authors in the ADAMS software package. The designed model allowed conducting of the reliable simulating of dynamic modes of buoyrap movement, which arise, for example, when the tug is circulated along a given circle. The main purpose of investigating the dynamics of buoyrap in this mode was to take into account the influence of the forces of attached liquid masses, in addition to the velocity forces of hydrodynamic resistance. Results of considering the forces of both classes show that, in describing the transient dynamical modes of buoyrap's movement, it is necessary to take into account the effect of the above-mentioned forces of attached masses, proportional to accelerations of elements of the buoyrap.

Key words
Deepwater cable, buoyrap, catenary curve, tug circulation, hydrodynamic resistance, forces of attached masses, finite segment cable model, computer simulation.

https://doi.org/10.31776/RTCJ.6307 

Bibliographic description
Leont'ev, V. and Smolnikov, B. (2018). Computer simulation of dynamics of underwater cable with load at the end. Robotics and Technical Cybernetics, 3(20), pp.61-67.

UDC identifier:
519.876.5:532.33

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