3
Two Degrees-of-Freedom Systems
In the previous chapter, we considered single degree-of-freedom vibration systems. We showed that many complex systems that one encounters in real life can be approximated as a single degree-of-freedom system to obtain a first-level assessment of vibration problem. We now consider more complex idealization of the real-world systems. The real-world systems usually are multi-degrees-of-freedom systems. To begin with, we shall now deal with a two-degrees-of-freedom system.
The systems that require two independent coordinates to describe their motion are called two degrees-of-freedom systems. Figs. 3.1–3.3 show some typical systems, which belong to the category of two degrees-of-freedom systems.
Figure 3.1 Two ...
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