Vibration Model
Home Up Introduction Harmonic Motion Vibration Model Natural Frequency Viscously Damped Free Vibration Forced Harmonic Vibration Rotating Unbalance

 

Vibration Model

The basic vibration model of a simple oscillatory system consists of a mass, a massless spring, and a damper. The spring supporting the mass is assumed to be of negligible mass. Its force-deflection relationship is considered to be linear, following Hooke's law, , where the stiffness k is measured in newtons/meter.

The viscous damping, generally represented by a dashpot, is described by a force proportional to the velocity, or . The damping coefficient c is measured in newtons/meter/second.

Figure 2 Spring-Mass System and Free-Body Diagram