弹簧质量对振动及波动特性的影响

Influence of spring mass on vibration and wave characteristics

本文讨论考虑弹簧质量时振子系统的振动频率、振动模式,以及相应波的传播特性.结果表明:对于质量很大的弹簧,振子的振动特性主要由1级振动模式决定;当考虑弹簧质量时,各个点的运动不能完全重复上个周期的运动,表明弹簧振子并非做纯粹的简谐振动.

The vibration frequency,vibration mode and wave propagation characteristics of the oscillator system are discussed when the spring mass is considered.The vibration characteristics of the vibrator are mainly determined by the first⁃order vibration mode for the spring with great mass.When the spring mass is considered,the motion of each point cannot completely repeat the motion of the previous cycle,which indicates that the spring vibrator is not pure harmonic vibration.