沙尘暴期间运动尘颗粒对高压输电导线施加的应力预测  

Prediction of the stress exerted by moving dust particles on high-voltage transmission lines during dust storm

作　　者：张强 吴学忠 薄天利 ZHANG Qiang;WU Xue-zhong;BO Tian-li(State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan 750021,China;School of Physics and Electronic-electrical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]国网宁夏电力有限公司,银川750021 [2]宁夏大学物理与电子电气工程学院,银川750021

出　　处：《兰州大学学报（自然科学版）》2023年第4期484-488,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：宁夏回族自治区重点研发计划社发领域项目(2021BEG03029);宁夏回族自治区重点研发计划(引才专项)项目(2020BEB04015);国家自然科学基金地区基金项目(12062023)。

摘　　要：针对沙尘暴期间输电导线动力学行为分析中运动粉尘颗粒对高压输电导线施加的应力预测,以引入的粉尘颗粒与输电导线的碰撞概率为基础,应用弹性碰撞模型和颗粒运动方程对碰撞时间予以定量预测,提出一种基于粉尘颗粒和输电导线尺度、粉尘质量浓度及流场作用的粉尘颗粒对输电导线施加应力的计算方法.揭示了以上因素对应力的影响规律:应力随粉尘颗粒的速度近似呈线性增大;随输电导线的半径近似呈线性增大;随粉尘颗粒的半径近似呈指数形式减小.结果表明,在输电线路设计中,不仅要考虑风荷载,还需考虑运动粉尘颗粒的作用.The prediction of the stress exerted by moving dust particles on high-voltage transmission lines was studied via an analysis of their dynamic behavior during dust storms.Based on the introduced collision probability between dust particles and the transmission line,the collision time was quantitatively predicted via the elastic collision model and the particle motion equation.A calculation method for the stress exerted by the dust particles on the transmission line was proposed,and the size of the dust particles and the transmission line,dust concentration and effect of the flow field were taken into account.The influence law of the above factors on the stress was further revealed,i.e.,the stress increased linearly with the particle velocity,increased approximately linearly with the radius of the transmission line and decreased exponentially with the particle radius.The results showed that not only wind load but also moving dust particles should be considered in the design of transmission lines.

关 键 词：沙尘暴 输电导线 风荷载 沙尘荷载 

分 类 号：X43[环境科学与工程—灾害防治]