2. Benchmark solution#

2.1. Reference quantity and result#

We test the value of \(\mathrm{RMS}\) in non-regression, on the total time of the normal force at the free end of the beam.

Two types of analyses were carried out:

  • The first analysis to consist in calculating the transient dynamic response on a modal basis consisting of the first 30 natural modes.

  • The second analysis consists in calculating the transient dynamic response on a modal basis consisting of 30 first natural modes to which static modes are added.

The calculation procedure is as follows:

  • we calculate the first 30 natural frequencies (up to \(\mathrm{4800Hz}\)) and the associated natural modes,

  • the stiffness, mass and damping matrices are projected onto a modal basis,

  • efforts are projected on a modal basis.

  • the dynamic transient response is calculated on a modal basis

  • we calculate RMS out of the total time of the normal force at node \(\mathrm{N2}\)

We do not have a RMS reference value for this problem so we present the two results independently.

2.2. Reference quantity#

  • RMS_T_TOTAL: value RMS based on the total normal force time (FORCE_NORMALE) at node \(\mathrm{N2}\).