Chekhranova L., Domashevskaya Ya.

LIDIA CHEKHRANOVA, Candidate of Engineering Sciences, Associate Professor,
e-mail: li-chehr@mail.ru
YANA DOMASHEVSKAYA, Postgraduate, e-mail: 100-70-100dom@mail.ru
Department of Shipbuilding and Ocean Technology, School of Engineering
Far Eastern Federal University
8 Sukhanov Str., Vladivostok, 690091, Russia

Test evaluation of flexible joints for bulwark stanchions
(review)

Abstract: The peculiarity of the operation of fishing vessels is frequent mooring at sea, as a result of which the mooring loads are transmitted through the rigging to the deck structures. One of the measures to prevent damage of the deck stringer–beam–sheerstrake unit is the use of flexible joints, which allows increasing bulwark maintainability, reducing non-operational downtime and, as a consequence, increasing the efficiency of fishing fleet. Repair works are reduced to the replacement of semi-rigid elements. On ships, these elements are presented in the variety of designs, since regulatory documents permit repair and design contractors to use their own developments. The article analyses the experience of using flexible joints on fishing vessels operating in the Far Eastern basin, and presents systematization of their design. Damages to the elements of the nodal connection of the stanchions with deck structures have been detected, the causes of these defects have been determined. The recommendations of regulatory documents for the design of the bulwarks of ships that moor at sea have been taken into consideration. The analysis of the technical literature and the operation of upgraded nodes identified flexible elements that enhance the maintainability of the bulwarks.
Keywords: joint connection, stanchion, bulwark, mooring, local strength, stress-deformation diagram, deck stringer, underdeck frame, buckling, damages.

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