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BRAVO SIGNED

Establishing Blend Repair limit of blisks –from A perspective of Vibration amplificatiOn

Total Cost €

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EC-Contrib. €

0

Partnership

0

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 BRAVO project word cloud

Explore the words cloud of the BRAVO project. It provides you a very rough idea of what is the project "BRAVO" about.

vibration    blisk    competence    scientific    3d    deviations    er    aeroengines    location    variances    capability    independence    tests    allowable    group    employing    possessing    transferable    industry    mistuning    reliability    blade    skills    optical    blades    simulations    scanning    blending    fails    blend    rig    exert    geometric    blended    maturity    damaged    limit    extremely    evaluation    model    traveling    modal    exacerbate    holistic    sustainment    efficient    philosophy    innovative    wave    subject    cycle    maximum    bench    optically    interdisciplinary    blisks    deepened    accounted    potentially    competitiveness    extensive    fatigue    contractors    rational    limits    supervisor    excitation    population    leader    issue    limited    bravo    aviation    tool    repaired    predictive    repair    measured    intrinsic    spinning    bladed    industrial    disk    underlying    relying    size    geometry    blends    dynamics    benefit    deterministic    excessive    professional    forced    operations    expensive    fundamental    probabilistic   

Project "BRAVO" data sheet

The following table provides information about the project.

Coordinator
POLITECNICO DI TORINO 

Organization address
address: CORSO DUCA DEGLI ABRUZZI 24
city: TORINO
postcode: 10129
website: www.polito.it

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Italy [IT]
 Total cost 183˙473 €
 EC max contribution 183˙473 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2019
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2020
 Duration (year-month-day) from 2020-09-16   to  2022-09-15

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    POLITECNICO DI TORINO IT (TORINO) coordinator 183˙473.00

Map

 Project objective

Efficient sustainment of the extremely expensive blisks in advanced aeroengines requires that damaged blades can be cost-effectively repaired by blending operations with high reliability. However, limited understanding of blending effects on the forced response of blisks challenges the rational determination of blend limits, i.e., the maximum allowable blend size, location and number in a damaged blisk. The underlying fundamental issue is whether or not the blends will exacerbate the intrinsic geometric mistuning such that the blisk is subject to excessive vibration level and fails from high cycle fatigue.

The project BRAVO aims to develop a comprehensive vibration evaluation tool for blended blisks and establish the repair philosophy on blend limits. By employing the state-of-the-art 3D optical geometry scanning technology, geometry variances due to both blends and intrinsic blade geometric deviations can be effectively accounted for. Major scientific advances include: Novel deterministic methodologies of forced response analysis for blended blisks relying on the optically based as-measured model. Holistic vibration evaluation of blended blisks by comparing the as-measured-model-based simulations, modal tests, bench test under traveling wave excitation and spinning rig tests. Innovative probabilistic assessment for predictive evaluation of a population of possible blends and further determination of a tailored blend limit for a damaged blisk.

A highly interdisciplinary collaboration will benefit both the ER with extensive experience in bladed disk dynamics, and the supervisor possessing top-level research capability in blade vibration testing. With deepened competence in both technical and transferable skills, the ER will reach a high level of professional maturity and scientific independence as a group leader.

Results will potentially exert a strong industrial impact for repair contractors, contributing to the competitiveness of European aviation industry.

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The information about "BRAVO" are provided by the European Opendata Portal: CORDIS opendata.

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