1. Reference problem

1.1. Geometry

Point masses:	\({m}_{{P}_{1}}={m}_{{P}_{2}}={m}_{{P}_{3}}=\dots \dots ={m}_{{P}_{8}}=m\)
Link stiffness:	\({k}_{\mathrm{AP1}}={k}_{\mathrm{P1P2}}={k}_{\mathrm{P2P3}}=\dots \dots ={k}_{\mathrm{P8B}}=k\)
Viscous damping:	\({c}_{\mathrm{AP1}}={c}_{\mathrm{P1P2}}={c}_{\mathrm{P2P3}}=\dots \dots ={c}_{\mathrm{P8B}}=c\)

1.2. Material properties

Linear elastic translation spring	\(k={10}^{5}N/m\)
Point mass	\(m=10\mathrm{Kg}\)
Unidirectional viscous damping	\(c=50N/(m/s)\)

1.3. Boundary conditions and loads

Boundary conditions:

Points \(A\) and \(B\): recessed \((u=0)\).

Loading: Sinusoidal concentrated force with variable frequency at point \({P}_{4}\)

Point \({P}_{4}\)	\({F}_{{x}_{4}}\mathrm{=}{F}_{0}\mathrm{sin}\Omega t\)	\(\Omega \mathrm{=}2\pi f\) \(5\mathrm{Hz}\le f\le 40\mathrm{Hz}\)
		\({F}_{0}\mathrm{=}\mathit{constante}\mathrm{=}\mathrm{1N}\)
Other points \({P}_{i}\)	\({f}_{{x}_{i}}=0\)

1.4. Initial conditions

Not applicable to the study of the permanent harmonic regime.