采用有限元法建立FDN型防振锤的三维模型进行仿真计算,得到了其锤头的电场分布规律,优化了小锤头结构,将锤头端部的最高场强由2 987 V/mm降至2 390 V/mm.根据优化结果制造试品后,对其进行不同气压下的电晕试验和功率特性试验,结果表明优化后的防振锤在4300m海拔下可有效地防止电晕放电,且谐振频率和功率消耗满足要求,峰谷值之比优于旧结构,具备良好的防振性能.%A three-dimensional finite element calculation model of the FDN -typed dampers has been constructed to compute their electric field distributions in this study. A variety of optimization schemes are proposed and compared, among which the most reasonable and feasible one can reduce the maximum electric field intensity on the surface of the damper from 2 987 V/mm to 2 390 V/mm. Based on the optimization proposal as mentioned in the paper, the sample dampers were manufactured and tested accordingly. The results showed the optimized dampers can prevent corona discharge at the 4 300 m altitude. In addition, the resonant frequency and power consumption of the new dampers meet the requirements as needed and the anti-vibration performance is much improved.
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