基于非线性有限元算法的高压电塔寿命预测

摘要

针对高压电塔在风载荷作用下的应力应变问题,提出一种基于非线性有限元的寿命预测算法.该算法根据高压电塔高柔低质的结构特点,并结合平均应力动态模拟电塔在风载荷作用下的疲劳寿命,最终达到对高压电塔的寿命预测.通过对220 kV高压电塔的实证模拟,结果显示:该算法的各阶自振周期模拟误差均小于5%,由Q420B型角钢材质构成的电塔主悬杆疲劳寿命仅为54.15年.该算法对工程设计具有一定的指导意义.%For high-voltage tower under wind stress and strain problems loads, made life prediction algorithm based on nonlinear finite element. The algorithm based on the structural characteristics of high-voltage tower soft low-quality, and combined with the average stress dynamic simulation electrical tower under wind loads of the fatigue life. It ultimately achieved the high-voltage tower life prediction. Finally, 220KV high-voltage tower empirical simulation results show that:each step of the algorithm natural cycle simulation error is less than 5%, the main angle from the Q420P type material constituting the suspension rod fatigue life of only 54.15 years. This algorithm has some guiding significance for engineering design.