Benchmark solution
=====================


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*.


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 :math:`0.25g`.


Uncertainty about the solution
---------------------------

Digital solution.


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.