Open Access

ABSTRACT

Vibro-Acoustic Prediction by Mechanical Impedance Method

by SAKO Fumiko¹, ADACHI Yukihiro¹, SHI Qinzhong², TSUCHIHASHI Masahiro², HAGIWARA Ichiro³

1 Master, Department of Mechanichal Sciences and Engineering, Tokyo Inst. Of Tech., Japan
2 Japan Aerospace Exploration Agency, Japan
3 Department of Mechanichal Sciences and Engineering, Tokyo Inst. Of Tech., Japan

The International Conference on Computational & Experimental Engineering and Sciences 2008, 6(4), 229-232. https://doi.org/10.3970/icces.2008.006.229

Abstract

Satellite equipment experience severe high random acoustic loads during launch phase. [1\hbox {}] Accurate prediction of this random vibration is demanded to prevent equipmtnt from trouble. In this paper, a new approach for vibro-acoustic coupling analysis is proposed to obtain more accurate prediction. The proposed method applies Mechanical Impedance Method to vibro-acoustic coupling analysis with FEM model of structure and SEA model of sound system. \newline The analysis of simple model is conducted to study the proposed method. The result from the comparison shows this method provides more accurate prediction with structure impedance calculated from area-excitation analysis than from point-excitation analysis.

---