Dynamical analysis of multi-stage cyclic structures

Denis Laxalde (1, 2) , Fabrice Thouverez (1) , Jean-Pierre Lombard (2)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
2 SNECMA Siège [Courcouronnes]

This paper deals with the dynamical analysis of a multi-stage assembly of cyclic structures such as, for example, turbomachinery compressor or turbines. If such assemblies are traditionally modelled stage by stage, the inter-stage coupling effect can sometime be important. As an answer to this issue, we propose a new method which combines a cyclic modelling of each stage with a realistic inter-stage coupling. Study cases are presented to evaluate the efficiency of the method.

Mots clés: Multi-stage; Bladed disk; Cyclic symmetry; Modal analysis

Domaines: Vibrations [physics.class-ph]; Mécanique des structures [physics.class-ph]

Denis Laxalde, Fabrice Thouverez, Jean-Pierre Lombard. Dynamical analysis of multi-stage cyclic structures. Mechanics Research Communications, 2007, 34 (4), pp.379-384. ⟨10.1016/j.mechrescom.2007.02.004⟩. ⟨hal-00227538⟩