1. Reference problem

1.1. Geometry

Excitation is a seismic movement of the imposed force type applied to point \(\mathrm{P4}\) in the \(\mathrm{dx}\) direction.

We are interested in the DSP of moving the \(\mathrm{P4}\) node.

1.2. Material properties

Point masses:	\(m=10\mathrm{Kg}\)
Elastic springs:	\(k={10}^{5}N/m\)
Shock absorbers:	\(c=50N/(m/s)\)

1.3. Boundary conditions and loads

The problem is one-dimensional in the \(x\) direction (1 degree of freedom per mass).

The excitement is a DSP of constant strength of level 1, between 3 and 13 \(\mathrm{Hz}\).