Extended Solution of a Trimmed Vehicle Finite Element Model in the Mid-Frequency Range

Sipos, Dávid; Brandstetter, Markus; Guellec, Antoine; Jacqmot, Jonathan; Feszty, Dániel

doi:10.4271/2020-01-1549

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…The virtual SEA model can be used to extend the prediction of noise level up to 4 kHz using the ACTRAN extended solution [21,22]. Figure 11 displays the noise level prediction obtained up to 4000 Hz.…”

Section: Extended Solutionmentioning

confidence: 99%

A Comparative Study of a Hybrid Experimental–Statistical Energy Analysis Model with Advanced Transfer Path Analysis for Analyzing Interior Noise of a Tiltrotor Aircraft

Sohrabi,

Segura Torres,

Cierco Molins

et al. 2023

Applied Sciences

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The excessive noise present within an aircraft cabin during flight operations constitutes a notable origin of fatigue, stress, and communication impediments for both pilots and passengers. Ensuring the comfort, well-being, and safety of passengers and crew members necessitates the accurate anticipation of noise levels. This study concerns the computation of structure-borne noise levels within the cabin of a tiltrotor aircraft. This investigation employed two distinct methodologies: advanced transfer path analysis (ATPA) and statistical energy analysis (SEA). To assess the results obtained with the ATPA approach, the acquired outcomes were compared with empirically measured sound pressure levels during airplane mode operations. The contributions of air-borne and structure-borne noises were calculated with the ATPA methodology. On the other hand, the structure-borne noise was calculated with a hybrid experimental–SEA model with ACTRAN software, and its results were compared with those of the ATPA method. The results show a good agreement between these methods at high frequencies, while at low frequencies, certain adjustments or modifications to the SEA model are necessary to predict the noise levels.

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Section: Extended Solutionmentioning

confidence: 99%

A Comparative Study of a Hybrid Experimental–Statistical Energy Analysis Model with Advanced Transfer Path Analysis for Analyzing Interior Noise of a Tiltrotor Aircraft

Sohrabi,

Segura Torres,

Cierco Molins

et al. 2023

Applied Sciences

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“…These coefficients are the Damping Loss Factors (DLF) and the Coupling Loss Factors (CLF) that represents the dissipated and the exchanged power in the system. Various approaches are available to obtain them, such as analytical SEA [1][2][3]; experimental SEA (also called as Power Injection Method-PIM) [4][5][6][7]; and Virtual SEA [8][9]. The latter attempts to put the PIM into the virtual environment using FEM, thus eliminating the necessity of conducting experiments.…”

Section: Introductionmentioning

confidence: 99%

Validation of finite element connection modeling by comparison of experimental and virtual power injection methods

Sipos¹,

Treszkai²,

Feszty³

2022

J. vibroeng.

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There are several ways to obtain the matrix of damping loss factors and coupling loss factors for Statistical Energy Analysis. The most recent approach is Virtual SEA, where the Power Injection Method is performed virtually on a finite element model. In order to validate this approach, the most common connection types are investigated in this paper through an L-junction of two coupled steel plates. Virtual SEA and experimental Power Injection Method results are compared in a bent, line welded, superglued and spotwelded variants. The respective finite element connection representation is also validated during the comparison. It was found that with the correct simulation setup, Virtual SEA provides good agreement with the experimental results. In case of the spotwelded variants, further investigations were necessary regarding the parameters of the connection. The influence of these parameters was evaluated and the greatest source of deviations in the results is found.

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Extended Solution of a Trimmed Vehicle Finite Element Model in the Mid-Frequency Range

Cited by 2 publications

References 14 publications

A Comparative Study of a Hybrid Experimental–Statistical Energy Analysis Model with Advanced Transfer Path Analysis for Analyzing Interior Noise of a Tiltrotor Aircraft

A Comparative Study of a Hybrid Experimental–Statistical Energy Analysis Model with Advanced Transfer Path Analysis for Analyzing Interior Noise of a Tiltrotor Aircraft

Validation of finite element connection modeling by comparison of experimental and virtual power injection methods

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