Study On High Intensity Reverberation Room Acoustic Spectrum Characteristics Analysis And Test Technology

Test of the acoustic environment is an important part of reliability engineering andspacecraft development process, with the aerospace, military equipment performance andreliability have become increasingly demanding in recent decades, the requirements ofsound environmental testingis also rising. The lowest total sound pressure level of acoustictesting of spacecraft to achieve140dB, the most commonly used acoustic test equipment isa reverberation chamber, structural stiffness, bulky spacecraft make a sound test in thereverberation room is a general trend. Therefore, the spectral characteristics of highintensity sound of the reverberation chamber and test research has great significance.Development in the world aerospace uses high intensity reverberation chamber briefly.Elaboration and analysis of system performance of the sound source, the modalfrequencies and modal density, the reverberation time, the spatial variation of the gassource system gas supply and gas source stability factor to control the effect of the soundspectrum.Research and analysis of the spectral characteristics of this project the sound of thereverberation chamber, mainly from the volume and modal density of the reverberationchamber, reverberation time, sound power and sound pressure level, the spatial variation,air system, media, and for several of the most important indicator of the stability of gaswith the gas source to start the design of theoretical calculations and after the completionof the practical effect of the comparison and analysis.From the actual needs of the scientific research and production, combined with differentcarrying the actual telemetry gives the envelope of the sound spectrum conditions and arebeing developed in the theoretical analysis derived from the sound spectrum of the controlscheme selected and the actual results to compare and analyze. Verified by experiments, toachieve the design specifications and test requirements of the spacecraft products.Reverberation chamber construction planning of high intensity, the index calculationof the sound source system and configuration analysis, the choice of the air system, testcontrol program development and spacecraft ground Dynamics EnvironmentalEngineering has a strong reference.