Deterministic, Hybrid and Statistical Vibro-Acoustic Models - a Methodology to Determine the VLS Payload Fairing Acoustic Behavior

AUTOR(ES)

Pirk, Rogério, Souto, Carlos d'Andrade

FONTE

J. Aerosp. Technol. Manag.

DATA DE PUBLICAÇÃO

2015-03

RESUMO

ABSTRACT: Finite element method (FEM) and boundary element method (BEM) are methods usually applied on low-frequency coupled fluid-structure analysis. On the other hand, statistical energy analysis (SEA) is a technique applied on small wavelength bandwidth predictions. However, in the mid-frequency, where deterministic calculations are costly and confidence intervals of SEA are not satisfied, hybrid FEM/SEA models can be used. This work presents a coupled vibro-acoustic analysis methodology of the Brazilian Satellite Launcher Vehicle payload fairing. FEM/FEM model accounts for the low-frequency internal responses. The high-frequency responses are computed by a SEA coupled elasto-acoustic model, and a hybrid FEM/SEA model calculates the payload fairing mid-frequency behavior.

Documentos Relacionados

• Loudness scattering due to vibro-acoustic model variability
• Implementation of acoustic materials to the VLS-1 Fairing - a sensitivity analysis using SEA
• Numerical Study of Vibro-Acoustic Responses of Un-Baffled Multi-Layered Composite Structure under Various End Conditions and Experimental Validation
• Comparação de tecnicas de analise de caminhos de transferencia vibroacusticos
• The Deterministic Behavior of Self-Incompatibility Alleles