Mechanical Analysis Of Typical Working Condition And Fittings Of Carbon Fiber Composite Core Wire

With the development of capacity expansion and expansion of transmission lines,carbon fiber conductors have emerged as the times require.They have many excellent properties in electrical and mechanical properties,but the carbon fiber composite core has poor radial pressure resistance and flexibility.It passes through the trolley wire under tensile load.Damage is easy to occur during construction,wire crimping,and clamping of the wire clamp,which has a huge impact on the later safety service of the wire.In this thesis,a 400/35 stranded carbon fiber composite core conductor and a 550/45 rod-shaped carbon fiber conductor are used as examples to establish a three-dimensional finite element model of the conductor,which considers elasto-plastic and frictional contact of the material.The tension between the strands under tensile and bending loads;a new finite element analysis and selection of key supporting fittings were carried out based on the newly developed carbon fiber expanded diameter wire JLZX1K/F2A-530(630)/55.Experimental Study.Research shows:(1)Carbon fiber composite core wire under tensile load:the cross-section stress is unevenly distributed in the direction of the wire axis and is related to the distance it is constrained.The closer the distance to the restrained end,the greater the cross-section stress of the strand and the minimum stress near the center strand(2)Carbon fiber composite core wire under tensile and bending load:the maximum stress is borne by the composite core wire,the aluminum wire strand stress is concentrated on the aluminum wire on the side of the wire facing away from the block;the aluminum wire of the outer layer of the wire is compared with the inner layer Aluminum wire is more susceptible to damage;as the bottom diameter of the pulley increases,the damage of the aluminum strands gradually improves;(3)The preliminary design of the 400/35 stranded carbon fiber composite core wire is 25 times the wire diameter of the supporting pulley when it is’ over the pulley;(4)The 550/45 rod-shaped carbon fiber composite core conductor can complete the construction process of the conductor over the trolley when the envelope angle with the pulley(bottom diameter≥ 30 times the conductor diameter)is 25° under 20%RTS(rated tensile breaking force)load.(5)Through a series of parallel moving cable clamps and 530(630)/55 carbon fiber expanded conductors under different load conditions,numerical simulation analysis and cooperation experiments were performed to determine the matching 530(630)/55 carbon fiber expanded conductors.The model is:SKLT-60.