钢芯铝绞线在张力与温度共同作用下的分层应力

Delamination stress of aluminum conductor steel reinforced under the action of tension and temperature

通过理论推导得到钢芯铝绞线在温度和张力共同作用下,分层应力计算公式;同时以某实际工程为例,在有限元软件中通过仿真分析得到各层应力的有限元仿真值;有限元仿真值与理论值进行对比,二者误差在5%以内,满足实际工程要求。研究表明仅在张力作用下,钢芯铝绞线轴向应力会出现明显的分层效应。钢芯铝绞线中钢芯层承担的应力明显大于铝股层,约为铝股的3~4倍;在张力和温度共同作用下,导线运行张力随着温度的升高而减小;同时随着温度升高,钢芯层应力在增大,铝股层应力在减小。

The formula for calculating the delamination stress of steel-cored aluminum stranded wire under the action of temperature and tension was deduced theoretically.At the same time,taking a practical project as an example,the finite element simulation value of stress of each layer was obtained through simulation analysis in the finite element software.The finite element simulation value was compared with the theoretical value,and the error between them was within 5%,which meet the actual engineering requirements.The results showed that the axial stress of aluminum stranded wire with steel core has obvious stratification effect only under the action of tension.The stress of steel core layer was obviously larger than that of aluminum strand layer,about 3-4 times of that of aluminum strand.Under the action of tension and temperature,the operating tension of wire decreased with the increasing of temperature.At the same time,with the increasing of temperature,the stress of steel core layer increased and the stress of aluminum strand layer decreased.