活塞在平行于长管的方向被迫作合谐摆动。
According to the cycle formula of simple harmonic vibration, the cycle formula of simple pendulum could be figured out.根据简谐运动的周期公式,得到单摆的周期公式。
Under the simple harmonic vibration, the stable forced vibration of multiple-degree-of-freedom system is analysed by using ANSYS software.运用ANSYS软件分析多自由度系统在简谐激励作用下的稳态受迫振动。