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BRAVO SIGNED

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

Total Cost €

0

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.

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

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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