Dischargecharacteristicsofferroelectricceramicsexplosive toelectricaltransducerimpactedbyexplosive-drivenflyer
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摘要: 为了研究铁电体作小型电磁脉冲弹高功率脉冲电源的放电特性,提出了爆轰驱动飞片撞击铁电体 的冲击波数值算法,计算了不同装药长度下飞片对铁电体的冲击载荷,建立了铁电体负载为高压储能电容的 去极化放电模型,设计了铁电体去极化放电装置,并进行了实验。实验表明:5mm 的装药柱长度能够满足铁 电体相变的压强条件;负载为0.2、18H 时,储能电容能够将放电脉宽拉伸至20s,去极化放电能量随着 铁电体并联数目增加而增加,放电损耗率大约15%。Abstract: Tostudythedischargecharacteristicsofferroelectricceramicsashighpowerpulsesupplyof miniatureelectromagneticpulsebombs,thenumericalalgorithmoftheshockwaveontheferroelectricceramicsimpactedbyanexplosive- drivenflyerwasbroughtforward.Theimpactloadsofdifferentcharginglengthswerecalculated. ThedepolarizationdischargemodelforPZT95/5loadedbya highvoltageenergystoragecapacitorwasestablished.Theexperimentaldeviceforthedepolarization dischargeofPZT95/5wasdesigned.Theexperimentalresultsshowthat5mmcharginglengthcan meetthetransitionpressureofferroelectricceramics.Theenergystoragecapacitorenlargesthedischargepulsewidthto20swhentheelectricalparametersoftheloadare0.2and18H. Thedepolarizationdischargeenergyincreaseswiththegrowthofthenumberoftheferroelectricceramicsin parallelconnection.Thedischarginglossrateisabout15%.
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Key words:
- mechanicsofexplosion /
- depolarization /
- explosive-driven /
- ferroelectricceramics /
- flyer
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