Mechanical Properties of Tension-Torsion Coupling in Aluminum Conductor Steel Reinforced
ZHANG Long1, HUANG Jue2, ZHONG Yongli3, YAN Zhitao3
1. Xinjiang Electric Power Research Institute，State Grid Corporation of China，Urumqi 830011，China; 2. School of Civil Engineering，Chongqing University，Chongqing 400045，China; 3. School of Civil Engineering and Architecture，Chongqing University of Science and Technology，Chongqing 401331，China
Abstract：The torsion parameter of the conductor is one of its basic mechanical properties. Moreover，the tension-torsioncoupling effect of iced transmission lines will greatly affect the accuracy of galloping analysis. To analyze this effect，the torsional test was carried out for the typical 7-strand aluminum conductor steel reinforced (ACSR) LGJ/JL/G1A-70/10，and the modeling and numerical analysis of the corresponding components are carried out by using the finite element simulation software ANSYS，the results ofwhich is compared with those calculated by the 4 theories based on the tension-torsioncoupling theory of wire rope. The results of numerical analysis are in good agreement with those of the torsion test. Thetwist factor values fluctuate greatly，which will lead to significant errors. Under the normal stress state，the conductor tension will produce a large torsion effect，and the section torsion of the conductor will also lead to a slight tension change. The tension-torsion coupling coefficient is not equal to the torsion-tension one. The theories based on steel wire rope do not consider the slip deformation and coordinate update of sub strand conductors，which overestimates the axial stiffness and the coupling effect of tension and torsion to a certain extent.
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