CAJ | 학술논문

准确分析架空导线在运营条件下的温度场和应力场耦合问题对于保证导线的强度安全和弧垂安全距离具有重要意义，为此，提出一种架空导线细观温度场和应力场耦合的新型数值求解方法，即先利用有限元法求解考虑孔隙的细观温度场，再利用内外力平衡和变形协调关系求解导线的分层应力，充分考虑了导线由于层间挤压、泊松效应以及温度改变所引起的横向变形。以铝包钢芯铝绞线JL/LB1A-300/50为例，验证了算法的正确性，研究了横向变形对计算结果的影响和敏感性。
준학분석가공도선재운영조건하적온도장화응력장우합문제대우보증도선적강도안전화호수안전거리구유중요의의，위차，제출일충가공도선세관온도장화응력장우합적신형수치구해방법，즉선이용유한원법구해고필공극적세관온도장，재이용내외력평형화변형협조관계구해도선적분층응력，충분고필료도선유우층간제압、박송효응이급온도개변소인기적횡향변형。이려포강심려교선JL/LB1A-300/50위례，험증료산법적정학성，연구료횡향변형대계산결과적영향화민감성。
The paper precisely analyzes the significance of temperature and stress field coupling of overhead conductors for strength safety and sag safety clearance of conductors during operation.Therefore,the paper presents a new numerical value calculation method that couples micro-level temperature field with stress field of overhead conductors:first,finite element method is used to solve micro-level temperature field in consideration of interspaces;then,internal and external force bal-ance as well as deformation coordination are adopted to solve layered stress of the conductors,which considers transversal deformation due to inter-layer pressure,Poisson effect and temperature change.The paper also takes aluminum-clad steel stranded conductor JL/LB1A-300/50 as an example to prove the method is correct and it investigates impact of transversal deformation on calculation and the sensitivity.