Qualification of turbine architectures in a multiphysical approach: application to a turboshaft engine

The performance of a turboshaft engine derives essentially from the performance of the turbine, which in turn is closely correlated with rotor/stator clearance at the blade tips. In this article we propose to define criteria for qualifying turbine architectures based on a geometric model which integrates variability due to the processes of obtaining parts, the assembly processes and the thermomechanical behaviour of the turbine. The geometric model proposed here integrates thermomechanical strains in 3D dimension-chains formalised by operations on polytopes (Minkowski sum and intersection).

[1]  Joseph K. Davidson,et al.  Tolerance Analysis and Allocation using Tolerance-Maps for a Power Saw Assembly , 2007 .

[2]  Jaime A. Camelio,et al.  Modeling and Control of Compliant Assembly Systems , 2006 .

[3]  Pierre Bourdet,et al.  Geometrical Behavior Laws for Computer-aided Tolerancing , 1996 .

[4]  Joseph K. Davidson,et al.  A New Mathematical Model for Geometric Tolerances as Applied to Round Faces , 2002 .

[5]  Rikard Söderberg,et al.  Computer-aided robustness analysis for compliant assemblies , 2006 .

[6]  Byeng D. Youn,et al.  Variation Propagation Analysis on Compliant Assemblies Considering Contact Interaction , 2007 .

[7]  Denis Teissandier,et al.  Operations on polytopes: application to tolerance analysis , 2011, ArXiv.

[8]  Serge Samper,et al.  Tolerance Analysis and Synthesis by Means , 2007 .

[9]  Kenneth W. Chase,et al.  Variation Simulation of Fixtured Assembly Processes for Compliant Structures Using Piecewise-Linear Analysis , 2005 .

[10]  Alain Desrochers,et al.  Computational Methodology for the Prediction of Functional Requirement Variations Across the Product Life-Cycle , 2009 .

[11]  Jean-Pierre Nadeau,et al.  Integration of thermomechanical strains into tolerancing analysis , 2009 .

[12]  Joshua U. Turner.  Relative positioning of parts in assemblies using mathematical programming , 1990, Comput. Aided Des..

[13]  Pierre Bourdet,et al.  A Study of Optimal-Criteria Identification Based on the Small-Displacement Screw Model , 1988 .