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用横坐标表示时间,纵坐标表示对平衡位置的位移画出振动质点的位移随时间变化的曲线称“振动图象”。简谐振动的振动图象是正弦(或余弦)曲线(图1),两个
The abscissa indicates the time, and the ordinate indicates a curve in which the displacement of the vibrating particle point is plotted against the displacement of the equilibrium position as a function of time, and is referred to as a “vibration image”. The resonant vibration image is a sine (or cosine) curve (Figure 1), two