我们花费了多年的时间,研究了架空导线悬挂点的应力问题,这些应力可以用现代化实验设备来测定。运行的架空导线往往受到一定的机械力以及气候(化学)、温度等环境因素产生的应力的影响。正常情况下,导线寿命取决于它所受的机械力,这些机械力集中体现在具代表性的三个点上(悬挂点、跨中、固定端),如图一所示。显然,所有应力在悬挂点处达到最大,悬挂点处静态应力超过了跨中和固定端。受温度影响的拉伸应力δ_2在跨中要比其它两点略小一些。由于导线走向的原因,在 We spent years studying the stress problems at overhead conductor suspension points that can be measured using modern laboratory equipment. Overhead conductors running are often subject to certain mechanical forces as well as stresses due to environmental factors such as climate (chemistry) and temperature. Under normal circumstances, the life of the wire depends on the mechanical force it is subjected to. These mechanical forces are concentrated on three representative points (suspension points, midspan and fixed ends) as shown in Figure 1. Obviously, all the stress reaches the maximum at the suspension point, and the static stress at the suspension point exceeds that at the mid-span and at the fixed end. The temperature-dependent tensile stress δ_2 is slightly smaller in the midspan than the other two. Because of the wire’s direction, at