(2)通过改变电磁加载的各项参数,完成了大量电磁声发射试验,基于对试验信号的波形特征和频谱分析,深入研究了不同的电磁加载条件与声发射信号之间的关系,得出了电磁声发射信号的幅值、能量及频谱特征随加载电流的幅值、脉冲宽度以及加载历史等参数的变化规律。该研究成果对电磁声发射技术的工程应用具有重要的指导意义。
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张 闯 1 刘素贞 1 金 亮 2 杨庆新 1,2
(1. 河北工业大学电磁场与电器可靠性省部共建重点实验室天津 3001302. 天津工业大学天津 300160)