CORDIS
EU research results

CORDIS

English EN

SEA Applied to the Prediction of High Frequency Vibrations in Aircraft Engines

Objective

Designed to achieve reduction in fuel consumption, the Ultra-High Bypass and High Propulsive Efficiency Geared Turbofan engine incorporates evolutions likely to produce high frequency (HF) vibration excitations which propagate through the structure. Numerical simulation is an efficient tool to control vibrations hence supporting the mechanical design. Where Finite Element (FE) based approaches show limitations due to computational hardware performances and HF dispersion management, Statistical Energy Analysis (SEA) stand as proven and effective method for this frequency range to predict the vibrational energy transfers across partitions – subsystems – of a structure. Challenges of SEA modelling consist of the structure partitioning which usually requires expertise and the accuracy loss at lower frequencies where the high stiffness of parts or complexity of junctions counter the method initial assumptions. Those statements depend strongly on the studied structure, therefore the objective of the proposed project is to develop and demonstrate a SEA modelling process to predict the vibration propagated in a typical complex engine frame. In this scope, best modelling practices from detailed numerical analysis are engaged to both support an extensive test campaign preparation including test vehicle design and manufacture, and produce models covering the target frequency range: from 400Hz to 10kHz. A crucial phase consists in the validation and update of these models from tests post-processing techniques and known methods such as Experimental SEA, Decay Rate damping estimation or input conductance as well as innovative inverse approaches relying on optimization loops. From the comprehensive comparison of these different methods with tests results, a best methods and associated modelling practices are delivered to the topic leader. CETIM and ESI join their complementary competences to develop the modelling and experimental know how applied to the HF vibrations assessment.
Leaflet | Map data © OpenStreetMap contributors, Credit: EC-GISCO, © EuroGeographics for the administrative boundaries

Coordinator

CENTRE TECHNIQUE DES INDUSTRIES MECANIQUES

Address

Avenue Felix Louat 52
60304 Senlis Cedex

France

Activity type

Research Organisations

EU Contribution

€ 495 128

Participants (1)

Sort alphabetically

Sort by EU Contribution

Expand all

ENGINEERING SYSTEM INTERNATIONAL SAS

France

EU Contribution

€ 353 330

Project information

Grant agreement ID: 831893

Status

Ongoing project

  • Start date

    1 April 2019

  • End date

    31 March 2022

Funded under:

H2020-EU.3.4.5.5.

  • Overall budget:

    € 848 459,38

  • EU contribution

    € 848 458

Coordinated by:

CENTRE TECHNIQUE DES INDUSTRIES MECANIQUES

France