ROTORINSA

Higher Edu - Research dev card
Development from the higher education and research community
  • Creation or important update: 25/11/11
  • Minor correction: 23/11/12
Keywords

ROTORINSA : prediction of the dynamic behavior of rotors in bending

This software was developed (or is under development) within the higher education and research community. Its stability can vary (see fields below) and its working state is not guaranteed.

 

General software features

This finite element software is devoted to the prediction of the steady state behavior of monorotors in bending.
Modeling
Node: 4 degrees of freedom.
Shaft: two-node beam element, classical stiffness and mass matrices, axial forces, shear, rotatory inertia and gyroscopic effect are taken into account.
Disk: one-node disk element, rigid and defined by mass and gyroscopic matrices.
Bearings: stiffness and damping matrices which can be non-symmetric and can vary as a function of the speed of rotation; active magnetic bearings.
Specific elements: modeling of particular effects such as couplings, magnetic attraction, stator …

ROTORINSA predicts:
In Statics:
- The deflection of the shaft subjected to gravity and/or forces which can be concentrated.

In Dynamics:
- Natural frequencies and modes in rotation, Campbell diagram, instabilities and damping factors.
- Mass unbalance response, asynchronous force response, response to a harmonic force fixed in space.
- Maximum stresses in the shafts, loads on bearings.
- Elementary energies.

Context in which the software is used

ROTORINSA is used for rotating machinery design and modification of the architecture of existing machines.
ROTORINSA is implemented on more than 20 industrial sites. It has been and it is still used for training at INSA-Lyon in France and in foreign countries.

The expertise of the laboratory has been greatly gained from contracts with companies and state organizations over a period of nearly 30 years.

Publications related to the software

The software is based on the theory presented in:
1. Rotordynamics Prediction in Engineering by Michel Lalanne and Guy Ferraris. J. Wiley, 254 p, 2nd edition 1998.
ISBN 0 471 97288 6
2. Dynamique des rotors en flexion. Guy Ferraris, Michel Lalanne. Techniques de l’ingénieur Traité
GĂ©nie MĂ©canique, B5 110, 1996.

ROTORINSA User manual
Marie Ange ANDRIANOELY - Guy FERRARIS - Michel LALANNE - Alain BERLIOZ - Alain THIVILLIER
Version 4.0.4 2011

ROTORINSA Qualification manual
Guy FERRARIS - Marie Ange ANDRIANOELY - Michel LALANNE - Alain BERLIOZ - Alain THIVILLIER
Version 4.0.4 2011