v2.06.103 SHLL103 — Harmonic response of a rotor with two disks and two non-symmetric bearings, subject to the gyroscopic effect

Summary:

This test makes it possible to validate the calculation of the harmonic response of a system of rotating shafts taking into account the gyroscopic effect and the bearings with non-symmetric characteristics.

In this test, we have a rotor model with two disks, supported by two hydrodynamic bearings, whose linearized stiffness and damping matrices are non-symmetric. This example and the corresponding reference results are taken from the qualification manual for ROTORINSA, [bib2], a finite element calculation software designed to predict the dynamic behavior of rotors under bending.

A good agreement is observed between the Code_Aster results and the reference solution.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
• 2. Reference solution
  • 2.1. Calculation method
  • 2.2. Reference quantities and results
  • 2.3. Bibliographical references
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Loading
• 4. Results
  • 4.1. Rotor stopped (OMEGA = 0 rpm)
  • 4.2. Rotor rotating at OMEGA = 40000 rpm
  • 4.3. Rotor rotating at OMEGA = 50000 rpm
  • 4.4. Rotor rotating at OMEGA = 60000 rpm
• 5. Summary of results