高压电器2017，Vol.53Issue(12)：1-7,7.DOI:10.13296/j.1001-1609.hva.2017.12.001
直流均匀场中球形金属微粒与电极碰撞的超声特性研究
Ultrasound Characteristics of Impact Between Spherical Metal Particles and Electrode in DC Uniform Field
摘要
Abstract
To investigate the ultrasound produced by the impact between spherical metal particles and electrode in DC GIL for online monitor of spherical metal particle motion,an experimental platform was set up for spherical metal particle motion in parallel plate electrodes under DC voltage.The ultrasonic signals generated by the impact between the aluminum particles and low-voltage electrode were obtained in the conditions of different voltage and particle sizes.And the amplitudes of the ultrasonic signals were extracted by the self-coded computer program to show that the amplitude increases with the augmentation of voltage and particle size under same condition.A mechanical model of the impact between the aluminum particles and the electrodes was established based on Ansys/LS-DYNA,hence the change of contact force during the impact process was achieved.Simulation illustrated that the contact force first increases and then decreases,thus a maximum value exists.At last,the correlation between the maximum contact force and the amplitude was analyzed,and it was shown that the maximum contact force is proportional to the amplitude.关键词
GIL/直流均匀场/球形金属微粒/碰撞/超声特性Key words
GIL/DC uniform field/spherical metal particle/impact/ultrasound characteristics引用本文复制引用
律方成,刘宏宇,颜湘莲,董蒙,张瑜,李志兵,詹振宇..直流均匀场中球形金属微粒与电极碰撞的超声特性研究[J].高压电器,2017,53(12):1-7,7.基金项目
国家电网公司科技项目(GY71-16-070).Project Supported by State Grid Corporation Technology Project Funding(GY71-16-070). （GY71-16-070）
