Integrated Aero–Vibroacoustics: The Design Verification Process of Vega-C Launcher

Bianco, Davide; Adamo, Francesco; Barbarino, Mattia; Vitiello, P.; Bartoccini, D.; Federico, Luigi; Citarella, Roberto

doi:10.3390/app8010088

Cited by 20 publications

(21 citation statements)

References 13 publications

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“…In the first article [16], an innovative integrated design verification process is described, based on the bridging between a new semiempirical jet noise model and a hybrid finite-element method/statistical energy analysis (FEM/SEA) approach, for calculating the acceleration produced at the payload and equipment level within the structure of Vega-C Launcher, vibrating under the external acoustic forcing field. The result is a verification method allowing for accurate prediction of the vibroacoustics in the launcher interior, using limited computational resources and without resorting to computational fluid dynamics (CFD) data.…”

Section: The Present Issuementioning

confidence: 99%

Advances in Vibroacoustics and Aeroacustics of Aerospace and Automotive Systems

Citarella

Federico

2018

Applied Sciences

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Section: The Present Issuementioning

confidence: 99%

Advances in Vibroacoustics and Aeroacustics of Aerospace and Automotive Systems

Citarella

Federico

2018

Applied Sciences

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“…Similar approaches in which simplified acoustic sources were used to simulate more complex acoustic fields can be found in literature, e.g., the noise generated by rocket engines in [2][3][4][5]. In fact, in these works a semi-empirical jet noise model has been exploited and adapted for reconstructing the experimental acoustic near field on the external surface of a space launcher, allowing an affordable vibro-acoustic assessment based on the achieved pressure excitation.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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.

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“…Besides, the FEM/BEM method is usually used to perform the free-field sound radiation analysis of open domains. Armentani [3,4] carried out a vibroacoustic analysis for the chain cover of a four-stroke four-cylinder diesel engine through an FEM-BEM coupled approach, while Bianco [5] described an innovative integrated design verification process, based on the bridging between a new semiempirical jet noise model and a hybrid finite-element method/statistical energy analysis (FEM/SEA) approach for calculating the acceleration produced at the payload and equipment level within the structure, vibrating under the external acoustic forcing field. However, there are few studies on the vibration noise induced by the vibration of the casing in a centrifugal fan.…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

et al. 2019

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A numerical optimization is presented to reduce the vibrational noise of a centrifugal fan volute. Minimal vibrational radiated sound power was considered as the aim of the optimization. Three separate parts of volute panel thickness (ST: the side panel thickness; BT: the back panel thickness; FT: the front panel thickness) were taken as the design variables. Then, a vibrational noise optimization control method for the volute casing was proposed that considered the influence of vibroacoustic coupling. The optimization method was mainly divided into three main parts. The first was based on the simulation of unsteady flow to the fan to obtain the vibrational noise source. The second used the design of experiments (DoE) method and a weighted-average surrogate model (radial basis function, or RBF) with three design variables related to the geometries of the three-part volute panel thickness, which was used to provide the basic mathematical model for the optimization of the next part. The third part, implementing the low vibrational noise optimization for the fan volute, applied single-objective (taking volute radiated acoustical power as the objective function) and multi-objective (taking the volute radiated acoustical power and volute total mass as the objective function) methods. In addition, the fan aerodynamic performance, volute casing surface fluctuations, and vibration response were validated by experiments, showing good agreement. The optimization results showed that the vibrational noise optimization method proposed in this study can effectively reduce the vibration noise of the fan, obtaining a maximum value of noise reduction of 7.3 dB. The optimization in this study provides an important technical reference for the design of low vibroacoustic volute centrifugal compressors and fans whose fluids should be strictly kept in the system without any leakage.

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Integrated Aero–Vibroacoustics: The Design Verification Process of Vega-C Launcher

Cited by 20 publications

References 13 publications

Advances in Vibroacoustics and Aeroacustics of Aerospace and Automotive Systems

Advances in Vibroacoustics and Aeroacustics of Aerospace and Automotive Systems

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

Vibroacoustic Optimization Study for the Volute Casing of a Centrifugal Fan

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