Single DegreeOfFreedom Systems

A single-degree-of-freedom system (SDF) is defined as a system whose motion can defined by a single parameter. Systems shown in figure 3.1 are systems of SDF. As shown in the figure only one parameter (u, x or 0 ) is required to define the position of the particle at each second.

For a system shown in 3.1—a, if we try to apply a dynamic force f (t), the equation of the motion can be written as:

Figure 3.1: Systems of single degree of freedom

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