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1970年,C.Yong,R.Fowles and R.P.Swigt发表的“An Electromagnetic Stress Gage”论文[1]中所阐明的理论有些不足之处,我们对它作了必要的补充,使其更加完善、严格。 本文用弹塑性波理论和法拉第电磁感应定律进一步证明了,一维平面波作用下,电磁应力传戚器敏感部分两端点所在截面包围的区域中,不论有多少个间断面,电磁应力传感器的动生电动势随时间的变化率始终与传感器敏感部分两端点处的应力差成正此。进一步指出,电磁应力传成器实质上是电磁冲量传感器,并且予告了恒压冲击波和线性衰减冲击波入射时,电磁应力传威器所能得到的ε—t、Ⅰ—t和σ—t曲线,对于分析实验曲线有指导意义。
In 1970, there were some deficiencies in the theory set forth in the article “An Electromagnetic Stress Gage” by C. Yong, R. Fowles and RPSwigt [1], and we made the necessary additions to make it more complete and rigorous . In this paper, using the theory of elastic-plastic wave and Faraday’s law of electromagnetic induction, it is further proved that no matter how many discontinuities exist in the area surrounded by the section where the two ends of the sensitive part of electromagnetic stress are, under the action of one-dimensional plane wave, the dynamic stress of electromagnetic stress sensor The rate of change of electromotive force with time is always positive with the stress difference at the two ends of the sensitive part of the sensor. It is further pointed out that the electromagnetic stress transmitter is essentially an electromagnetic impulse sensor and is informed of the ε-t, I-t and σ-t curves that can be obtained by the electromagnetic stress transmitter when the constant voltage shock wave and the linear damping shock wave are incident, It is instructive to analyze the experiment curve.