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research-article

RIG AND ENGINE VALIDATION OF THE NON-LINEAR FORCED RESPONSE ANALYSIS PERFORMED BY THE TOOL ORAGL

[+] Author and Article Information
Andreas Hartung

MTU Aero Engines AG, Dachauer Straße 665, 80995 Munich, Germany
andreas.hartung@mtu.de

Hans-Peter Hackenberg

MTU Aero Engines AG, Dachauer Straße 665, 80995 Munich, Germany
hans-peter.hackenberg@mtu.de

Malte Krack

University of Stuttgart, Pfaffenwaldring 6, 70569 Stuttgart, Germany
malte.krack@ila.uni-stuttgart.de

Johann Gross

University of Stuttgart, Pfaffenwaldring 6, 70569 Stuttgart, Germany
johann.gross@ila.uni-stuttgart.de

Torsten Heinze

Leibniz University of Hannover, Appelstraße 11, 30167 Hannover, Germany
heinze@ids.uni-hannover.de

Lars Panning-von Scheidt

Leibniz University of Hannover, Appelstraße 11, 30167 Hannover, Germany
panning@ids.uni-hannover.de

1Corresponding author.

ASME doi:10.1115/1.4041160 History: Received July 02, 2018; Revised July 25, 2018

Abstract

Since the first non-linear forced response validation of frictionally coupled bladed disks, more than 20 years have passed, and numerous incremental modeling and simulation refinements were proposed. With the present work, we intend to assess how much we have improved since then. To this end, we present findings of an exhaustive validation campaign designed to systematically validate the non-linear vibration prediction for the different friction joints at blade roots, interlocked shrouds and under-platform dampers. An original approach for the identification of crucial contact properties is developed. By using the Dynamic Lagrangian contact formulation and a refined spatial contact discretization, it is demonstrated that the delicate identification of contact stiffness properties can be circumvented. The friction coefficient is measured in a separate test, and determined as unique function of temperature, preload, wear state. Rotating rig and engine measurements are compared against simulations with the tool OrAgL, developed jointly by the Leibniz Universität Hannover and the University of Stuttgart, in which state of the art Component Mode Synthesis and Harmonic Balance methods are implemented.

Copyright (c) 2018 by ASME
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