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

被引:8
|
作者
Pirk, Rogerio [1 ,2 ]
Souto, Carlos d'Andrade [1 ,2 ]
机构
[1] Inst Aeronaut & Espaco, BR-12228904 Sao Jose Dos Campos, SP, Brazil
[2] Inst Tecnol Aeronaut, Sao Jose Dos Campos, SP, Brazil
关键词
Launcher; Payload fairing; Vibro-acoustics; Coupled analysis; Hybrid analysis;
D O I
10.5028/jatm.v7i1.392
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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.
引用
收藏
页码:101 / 109
页数:9
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