雷电流作用下金属损伤试验的影响因素
发布时间：2019-05-05 15:12
【摘要】：当前国内外缺乏雷电流金属损伤试验影响因素的研究,因而采用试验与理论相结合的方法研究了雷电流金属损伤试验中电极形状、铜丝引线、试验距离对试验结果的影响。研究结果表明:模拟首次短时间回击电流分量、回击间长持续时间雷电流分量和末次回击后的长持续时间雷电流分量下的金属损伤试验中,增大引燃铜丝直径可加大金属损伤深度;增加试验距离会增大模拟雷电流流注发展区域半径,减小电弧单位面积能量,从而使试品损伤面积增大,损伤深度减小;使用尖电极、半椭球电极和半球电极产生的流注初始区域半径和发展区域半径依次减小,使用尖电极造成的试品损伤深度和损伤面积最大,其次为半椭球电极和半球电极;相同电极形状下,减小试验电极直径,试品损伤深度增加,损伤面积减小。
[Abstract]:At present, there is no research on the influence factors of lightning current metal damage test at home and abroad. Therefore, the influence of electrode shape, copper wire lead and test distance on the test results in lightning current metal damage test is studied by means of the combination of experiment and theory. The results show that the first short-time lightning current component, the long-duration lightning current component and the metal damage test under the long-duration lightning current component after the last stroke are simulated. The metal damage depth can be increased by increasing the diameter of ignited copper wire. Increasing the test distance will increase the radius of simulated lightning current flow development area and reduce the energy per unit area of arc, which will increase the damage area and decrease the damage depth of the sample. Using pointed electrode, hemispherical electrode and hemispherical electrode, the radius of initial flow region and developing area decreased sequentially, and the damage depth and damage area were the largest when using pointed electrode, followed by hemispherical electrode and hemispherical electrode. Under the same electrode shape, the damage depth of the sample increased and the damage area decreased when the diameter of the test electrode was decreased.
【作者单位】： 上海交通大学电气工程系;电力传输与功率变换控制教育部重点实验室;中石化股份有限公司青岛安全工程研究院化学品安全控制国家重点实验室;
【基金】：国家自然科学基金(51577117)~~
【分类号】：TG115.5
，
本文编号：2469668
[Abstract]:At present, there is no research on the influence factors of lightning current metal damage test at home and abroad. Therefore, the influence of electrode shape, copper wire lead and test distance on the test results in lightning current metal damage test is studied by means of the combination of experiment and theory. The results show that the first short-time lightning current component, the long-duration lightning current component and the metal damage test under the long-duration lightning current component after the last stroke are simulated. The metal damage depth can be increased by increasing the diameter of ignited copper wire. Increasing the test distance will increase the radius of simulated lightning current flow development area and reduce the energy per unit area of arc, which will increase the damage area and decrease the damage depth of the sample. Using pointed electrode, hemispherical electrode and hemispherical electrode, the radius of initial flow region and developing area decreased sequentially, and the damage depth and damage area were the largest when using pointed electrode, followed by hemispherical electrode and hemispherical electrode. Under the same electrode shape, the damage depth of the sample increased and the damage area decreased when the diameter of the test electrode was decreased.
【作者单位】： 上海交通大学电气工程系;电力传输与功率变换控制教育部重点实验室;中石化股份有限公司青岛安全工程研究院化学品安全控制国家重点实验室;
【基金】：国家自然科学基金(51577117)~~
【分类号】：TG115.5
，
本文编号：2469668
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2469668.html
