电磁驱动的固定弦振动的理论分析

Theoretical analysis for stationary vibration of a metal string driven electromagnetically

对电磁驱动的弦线波动方程进行分析 ,得到了严格的理论解 .很好地解释了实际中出现的几个现象 ,并且讨论了驻波振幅与磁场和讯号源的依赖关系 .结果表明 :驻波振动的振幅与讯号源的电压或电流成正比 ,与磁场的关系依赖于电磁阻尼和空气阻尼的相对大小 .

The wave equation of a metal string in magnetic field is solved accurately. Several phenomena are interpreted very well.The dependence of the resonance amplitude on the magnetic field and the source of alternating current is discussed. It is shown that the amplitude is direct proportional to the volotage or current and the dependence on the magnetic field relys on the relative value of the air and the electromagnetic damping factor.