Using Lagrange equation, the literature analyses the vibration of the beam from the point of view of energy. And the result is compared with testing result of literature[4]. A small error is gained.

• 文中给出了一种从能量的角度,利用拉格朗日方程对梁的振动进行分析的方法,并将得到的结果与文献[4]中试验结果进行比较,发现此处理方法得到的结果误差较小。