2. Benchmark solution

2.1. Calculation method used for the reference solution

Resolution based on a modal projection (consisting of natural modes with a blocked interface and static constrained modes calculated by the Code_Aster) performed by MISS3D in the frequency domain on finite border elements. There is also the possibility of performing this resolution by Code_Aster using the harmonic resolution operator after having recovered from MISS3D the ground impedances and the seismic forces that vary according to the frequency.

Return to time post-processed by MISS3D by inverse Fourier transform.

Return to the physical basis of a harmonic or transitory evolution resulting from Code_Aster.

2.2. Benchmark results

Harmonic responses at the upper nodes (N800, N1500, and N2700) at frequencies close to resonances.

Maximum transient accelerations at these same points for a spectrum EUR of \(0.25g\).

2.3. Uncertainty about the solution

Digital solution.

2.4. Bibliographical references

• User manual and reference for MISS3D - (version 5.6) (D. CLOUTEAU - Lab MSSM - ECP).

• Aster interface - MISS3D: principle and use (G. DEVESA - Technical Note HP‑62/95/038/B.