Journal: Volume 21, No. 4, 2016
Pages: 5 – 11
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The method for providing constructive stability of underground optical cables to tensile stresses

Oleh Volodymyrovych Bondarenko, Dmytro Stepanov, Denys Bahachuk, Victor Tikhonov, O. Verbytskyi

Abstract

The development of optical cables constructions is not investigated fully in Ukraine. One of the drawbacks in OC construction in Ukraine consists in the lack of governing regulations, that regulate the development of cable constructions, especially its mechanical strength. The method for calculation of OC mechanical strength involves, in its turn, the determination of its permissible tensile force. The research aims at the development of engineering technique to ensure OC sustainability to tensile stresses, making the changes of optical fiber characteristics during construction of cable lines and entire cable lifetime impossible. In this paper the method for providing constructive stability of underground optical cables (OC) to tensile stresses, which is taken by central power element from steel wire or fiberglass rod and peripheral one-layer or multilayer power element from steel wire or fiberglass rod or aramid threads "Twaron", is developed. The method is designed to calculate and assess the stability of optical cables to tensile stresses within the maximum deformation. The calculations have shown that in the conditions of cable slight lengthening (to 0.5%) in order to obtain greater value of tensile forces Fd it is expedient to use steel wire as a central power element (CPE), as well as aramid threads «Twaron» of D- 2200 type with greater linear density should be used as a peripheral power element (PPE). This enables in combination with PPE to achieve tensile force value 5140 N, that is much bigger than the use of fiberglass rods as CPE. Since the use of steel wire has certain limitations, then it is necessary to use fiberglass rods as CPE at cable lengthening more than 0.5%. The given method for providing constructive stability of underground OC to tensile stresses can be used in the development of normative documents on designing of cable mechanical strength

Keywords

optical cable construction, power elements, tensile stress, deformation, metal wire, fiber glass rod, aramid threads

References

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Suggested citation

Bondarenko, O.V., Stepanov, D., Bahachuk, D., Tikhonov, V., & Verbytskyi, O. (2016). The method for providing constructive stability of underground optical cables to tensile stresses. Bulletin of Cherkasy State Technological University, 21(4), 5-11.