## N. Harmonic Analysis of an In-Vacuum Elastic Structure (HAR1)

In this analysis, known harmonic displacements and/or forces are imposed on the elastic structure. The system of equations becomes:

([Kuu] - w2[M]) U= F

The user provides the prescribed displacements and/or forceson given nodes and the code computes the entire displacement field. The user controls the frequency scan. The displacements and/or forces are prescribed using the EXCITATIONS and/or LOADS commands.

The matrices are assembled and stored to file by columns. Gaussian algorithms are used to solve the problem, in single or in double precision. The internal losses of the materials can be taken into account.