Simple Structure

A three-mass system—a simple structure—is used mainly for illustration purposes, and to make examples easy to follow. Its simplicity allows for easy analysis, and for straightforward interpretation. Also, solution properties and numerical data can be displayed in a compact form.

The system is shown in Fig. 1.1. In this figure mi, mi, and m represent system masses, ki, ki, fe, and k*, are stiffness coefficients, while di, di, di, and d4, are damping coefficients. This structure has six states, or three degrees of freedom.

-

2

3

-A/M-

71

71

71

71

11

11

11

11

d1

d2

d3

d4

Figure 1.1. A simple structure.

Figure 1.1. A simple structure.

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