Hybrid FE-SEA Modeling and Experimental Validation of an Aircraft Floor Structure for the Analysis of Vibration Isolators

Azevedo, Gregório G.; Bustamante, Marcelo; Cordioli, Júlio A.; Greges, Samir N. Y.; Weisbeck, Jeff; Oliveira, André de

doi:10.4271/2012-36-0526

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…It was shown that the hybrid model could accurately predict absolute panel vibration and cavity SPL. Azevedo [16] modeled the floor structure of an aircraft using the hybrid method to predict the response of the vibration and the results was experimentally validated. Cordioli [17] investigated the transmission loss of various slits based on the hybrid FE-SEA method, and analyzed the parameters of influencing the transmission loss of the typical slits and seals.…”

Section: Introductionmentioning

confidence: 99%

Structural-acoustic modeling and analysis of an engineering machinery cab in the mid-frequency range

Gong¹,

Jiao²,

Nguyen³

2019

Vib. proced.

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The hybrid finite element method and statistical energy method was used to study the vibro-acoustic coupling characteristics of an engineering vehicle cab. The parameters of the statistical energy method, such as modal densities, damping loss factors and coupling loss factors of substructures, were acquired by numerical and analytical methods. The acoustic-structure coupling of the cab was established based on the modal densities of substructures. The vibration and noise excitations of the cab were measured by test and the sound pressure level response of the driver's ear was predicted. It was shown that the prediction results based on the hybrid method are in agreement with the experiments and the proposed method can be applied to predict the mid-frequency response of complex vibro-acoustic coupling systems with a moderate computational cost and accuracy.

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Section: Introductionmentioning

confidence: 99%

Structural-acoustic modeling and analysis of an engineering machinery cab in the mid-frequency range

Gong¹,

Jiao²,

Nguyen³

2019

Vib. proced.

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Obtaining Structure-borne Input for Hybrid FEA/SEA Engine Enclosure Models through a Simplified Transfer Path Analysis

Zhen

Copley

Londhe

et al. 2015

SAE Int. J. Commer. Veh.

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Estimation of Response of Composite Shells to Acoustic Excitation Using Sea and Its Experimental Verification

Josephine Kelvina Florence,

Renji

2023

joast

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Shells made up of composite material are extensively used in aerospace structures as they offer excellent specific strength and stiffness properties over their metallic counterparts. These elements experience high frequency and high intensity acoustic loads during the launch. Response behaviour of structures in the high frequency region is analyzed in a Statistical Energy Analysis (SEA) framework. Though the methodology of estimating the response using SEA exists, its applications to composite cylindrical shells and how they compare with experimental results are seldom reported. Present work fills this gap. Acceleration and strain responses of a typical composite sandwich cylinder under diffused acoustic field are estimated in SEA framework. Modal densities and coupling loss factors are estimated using expressions. The dissipation loss factors are determined experimentally. Same cylinder is subjected to diffused acoustic field in reverberation chamber and the accelerations and strains are measured. The work presents how much the theoretically estimated responses compare with the experimentally obtained results. It is seen that the acceleration responses compare reasonably well, but needs improvement. The strain-velocity relations compare very well. Acceleration and strain bounds such that 99 % of all measurements are within are also predicted which could be used in the structural design.

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Hybrid FE-SEA Modeling and Experimental Validation of an Aircraft Floor Structure for the Analysis of Vibration Isolators

Cited by 3 publications

References 7 publications

Structural-acoustic modeling and analysis of an engineering machinery cab in the mid-frequency range

Structural-acoustic modeling and analysis of an engineering machinery cab in the mid-frequency range

Obtaining Structure-borne Input for Hybrid FEA/SEA Engine Enclosure Models through a Simplified Transfer Path Analysis

Estimation of Response of Composite Shells to Acoustic Excitation Using Sea and Its Experimental Verification

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