基于等尺寸的钢索体热分析简化模型研究OACHSSCD

The refined cable model requires substantial effort and high computational cost when it is used to calculate the temperature field of a cable system under fire conditions.Therefore,an efficient and accurate simplified model for the cable temperature field is required.In this study,ABAQUS software was used to perform heat transfer analysis.The temperature field distribution of a refined cable model and a full-scale round steel model was compared and analyzed.Based on heating theory and the geometric properties of cable strands,correction parameters and a corresponding method for the round steel model were proposed.A simplified full-scale round steel model based on parameter correction was then established.Numerical experiments were conducted to determine the optimal values of the correction coefficients.The results show that the refined cable model and the full-scale round steel model predict significantly different temperature rises for cables with different specifications,and this difference becomes more significant as the cross-sectional size increases.Correcting the density and thermal conductivity of the round steel can effectively enhance the simulation accuracy of the full-scale round steel model.When the correction coefficients for density and thermal conductivity are set to 0.45 and 0.35,respectively,the model accurately simulates the temperature field distribution of the cable under various heating curves.