Research on Coupling Simulation Method of Temperature Field and Stress Field in Double-Layer Thin-Walled Corrugated Tube

In recent years, with the increasing power load in major cities in China, the existing conventional power cables are unable to meet the high-density and high-capacity power transmission requirements. High-temperature superconducting cables, with their characteristics of high capacity, low loss, compact structure, energy-saving, and environmental-friendliness, have promising applications for future urban high-density power transmission. As one of the key components in the cryogenic refrigeration system of superconducting cables, the mechanical performance of double-layer thin-walled stainless steel corrugated tubes directly determines the ability of superconducting cables to resist external forces. In order to study the mechanical performance of double-layer thin-walled stainless steel corrugated tubes under the operating conditions of superconducting cables, this paper establishes a three-dimensional shell model of double-layer thin-walled stainless steel corrugated tubes under tension and bending conditions using finite element simulation. It analyzes the stress and plastic strain distribution characteristics of the double-layer thin-walled corrugated tubes and proposes a temperature field and stress field coupling simulation method for double-layer thin-walled corrugated tubes.