Benchmark solution ===================== Calculation method ----------------- The co-localized harmonic response at point A is calculated by a direct method, frequency by frequency. So, frequency by frequency: * we define a viscoelastic material whose properties are interpolated from the data of; * the assembled mass and hysteretic stiffness matrices are calculated; * we solve the dynamic equation on a physical basis (operator DYNA_LINE_HARM [:external:ref:`U4.53.11 `]). Reference quantities and results ----------------------------------- The tests are carried out on the frequency response co-localized to point A at 1 Hz, 100 Hz, and 500 Hz. Uncertainty about the solution ---------------------------- Digital solution.