Multi-physical-field simulation modeling method for optical fiber attenuation characteristics in OPLC cable

Abstract

The invention discloses a multi-physical-field simulation modeling method for optical fiber attenuation characteristics in an OPLC cable. The method comprises the following steps: firstly, carrying out geometric modeling on the OPLC; secondly, selecting materials and material parameters corresponding to each structure of the OPLC; thirdly, setting finite element solving conditions, and setting boundary conditions of a current field, a solid heat transfer field and a solid mechanical field; sweeping the section of the OPLC cable after free triangular mesh generation, and then carrying out coupling calculation; then, obtaining OPLC temperature field distribution and strain distribution; and finally, substituting the influence of the OPLC on the temperature and strain of the optical fiber into optical fiber attenuation simulation to obtain attenuation of the optical fiber in the OPLC cable. According to the method, the influence of current, temperature distribution and strain in the operation process of the OPLC cable on the optical fiber attenuation characteristic in the OPLC cable can be obtained more easily through multi-physical field coupling simulation based on the finite element method, the obtained optical fiber attenuation result is more accurate, and the method has important guiding significance for research on optical fiber attenuation in the OPLC cable.

Description

technical field [0001] The invention belongs to the technical field of optical fiber composite low-voltage cable OPLC, and in particular relates to a multi-physical field simulation modeling method for optical fiber attenuation characteristics in an OPLC cable. Background technique [0002] OPLC is a cable composed of an insulated core and an optical transmission unit with the ability to transmit electric energy and optical communication. It can provide power and information transmission at the same time. It is suitable for power projects with a rated voltage of 0.6 / 1 (1.2) kV and below. . OPLC enables the complex engineering of multiple lines such as electric wires, network cables, telephone lines, and cable TV lines that originally needed to be laid into an integrated construction, realizing the integration of four networks, which not only simplifies the installation process, but also greatly saves line resources and pipelines resource. At the same time, it has the advan...

AI Technical Summary

Problems solved by technology

At present, there have been studies on the electrothermal coupling analysis of cables, but for the strain generated by the interaction in the cable, and the influence of thermal field and strain on the transmission attenuation of the optical fiber in the OPLC cable, the electrothermal coupling analysis cannot obtain results.

Images