A Novel Optimization Framework to Replicate the Vibro-Acoustics Response of an Aircraft Fuselage

Venanzio Giannella,Mattia Barbarino,Luigi Federico,Riccardo Lombardi,Roberto Citarella,Matteo Maria Pisani

doi:10.3390/app10072473

Abstract

In this work, a novel optimization framework, based on a Multi-Disciplinary Optimization (MDO) procedure, applied to the vibro-acoustic Finite Element Method (FEM) model of an aircraft fuselage mock-up, is proposed. The MDO procedure, based on an Efficient Global Optimization (EGO)-like approach, is implemented to characterize acoustic sources that replicate the sound pressure field generated by the engines on the fuselage. A realistic sound pressure field, evaluated by aeroacoustic simulations, was considered as the reference acoustic load, whereas two equivalent sound fields, displayed by two different arrays of microphones and generated by the same configuration of monopoles, were calculated by the proposed vibro-acoustic FEM-MDO procedure. The proposed FEM-MDO framework enables to set up ground experimental tests on aircraft components, useful to replicate their vibro-acoustic performances as if tested in flight. More in general, such a procedure can also be used as a reference tool to design simplified tests starting from more complex ones.

Highlights

Nowadays, an accurate evaluation of noise generation and propagation has become a key concern, especially in the areas in which the comfort for end users has become a turning point
A Finite Element Method-Multi-Disciplinary Optimization (FEM-MDO) framework has been proposed to characterize sets of acoustic sources that replicate the sound field produced by the real engines on an aircraft fuselage mock-up
Compared between Reference Case (RC) and SC1

Summary

Introduction

An accurate evaluation of noise generation and propagation has become a key concern, especially in the areas in which the comfort for end users has become a turning point. The aeronautics industry requires several experimental tests during the designing processes that, very often, present huge costs and generally are not simple to carry out with a reasonable accuracy. A Finite Element Method-Multi-Disciplinary Optimization (FEM-MDO) framework has been proposed to characterize sets of acoustic sources that replicate the sound field produced by the real engines on an aircraft fuselage mock-up. This procedure would enable to set up ground experimental tests on aircraft components, useful to replicate their vibro-acoustic performances as if

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