| 宋 琳,丁 锋,张金波,张源源,孟繁辉.有限元法在真实环境下大气电场仪误差修订中的应用[J].电子测量与仪器学报,2021,35(8):152-161 |
| 有限元法在真实环境下大气电场仪误差修订中的应用 |
| Application of finite element method in the revision of atmosphericelectrostatic field instrument error in real environment |
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| DOI： |
| 中文关键词: 大气电场 有限元法 静电场畸变 误差修订系数 地形因子 |
| 英文关键词:atmospheric electrostatic field finite element method electrostatic field distortion error revision coefficient terrain factor |
| 基金项目:国家自然科学基金（41871020）、青岛市气象局青年科研专项课题（2016qdqxq13）项目资助 |
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| 中文摘要: |
| 大气电场仪的环境误差修订对于提高雷电预警准确率具有非常重要的意义。 针对已有的模拟计算方法难以准确还原
真实复杂的边界条件这一问题,利用有限元法模拟大气电场仪所在位置处的真实地形和建筑物等对大气电场畸变的影响,并对
实测数据进行了环境误差修订。 与已有方法相比,有限元法既模拟还原了真实的边界形状又提高了求解精度和计算速度。 结
果表明,位于平地时大气电场仪的误差修订系数与导体距离之间具有幂函数的变化关系,在屏蔽距离内山地的修订系数变化率
较平地更大;误差修订系数与屋顶边缘距离具有二次函数的变化关系,山地的修订系数较平地更小。 通过模拟计算还得到,崂
山各测站的环境误差修订系数均小于 1,对于屋顶测站和地面测站,地形都是其环境误差的主要影响因素。 |
| 英文摘要: |
| The revision of the environmental error of the atmospheric electrostatic field ( EF) instrument is of great significance for
improving the accuracy of lightning early warning. Because the existing simulation calculation methods are difficult to accurately restore
the true and complex boundary conditions, the Finite Element Method is used to simulate the influence of terrain and surrounding objects
on the measurement results of the EF, and revised the error of the atmospheric EF instrument in the actual environment. Compared with
the existing methods, the Finite Element Method not only simulates and restores the true boundary shape, but also improves the solution
accuracy and calculation speed. The results show that there is a power function relationship between the error revision coefficient of the
atmospheric EF meter and the conductor distance when it is located on flat ground. In the shielding distance, the error revision coefficient
of mountainous areas has a greater change rate than that of flat ground; the revision coefficient have a quadratic function relationship with
the instrument position, and the revision coefficient of mountainous areas is smaller than that of flat ground. Through simulation
calculations, it is also obtained that the environmental error revision coefficients of various atmospheric EF instrument stations in Laoshan
are all less than 1. For different stations, terrain is the main influence factor of their environmental errors. |
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