1. Reference problem

1.1. Geometry

Consider a rectangular steel plate of \(\mathrm{2m}\mathrm{\times }\mathrm{1m}\mathrm{\times }\mathrm{1cm}\).

1.2. Material properties

The material is isotropic elastic whose properties are:

• \(E=210000\mathit{MPa}\)

• \(\nu =0.3\)

1.3. Boundary conditions and loads

The plate is simply supported on its 4 corners: the translations are blocked, the rotations are free.

1.4. Initial conditions

Not applicable for modal analysis.