摘要
本文借助磁路定理,非齐次泛定方程的定解和没有初始条件弦振动微分方程解,较详细地研究了驻波实验的物理机制,并探讨了一种结论,当调节弦长为四分之一波长的奇数倍时,形成一端为波腹另一端为波节的稳定驻波。实验证明,该理论推导正确,多次实验是稳定的。
In this paper, the detailed properties of standing wave experiment in physics are dealt with by the theorem of magnetic clrcuits, the solution of non-homogeneous functional equation and the solution of differential equation without initial value in string oscillation。 Meanwhile it is correct that alconclusion, a stable standing wave with one end of antinode and the other end of node, is investigated when the length of the string equals to odd multiple of λ/4, and experiments have proved that it is stable.
关键词
弦振动
电磁驻波
物理机制
exciter function
method of Green's function
forcedstable oscillation
