Statistical Energy Analysis On Satellite High-frequency Vibration & Isolation

For the satellite launch, the mechanical environment contains vibration, noise, overload and impact. All of these factors have great influence on the satellite function and reliability. Nowadays, adapter with bigger stiffness is popular for connection between the satellite and launch vehicle. The environmental load which is harmful to satellite performance, transfers from the adapter interface to satellite directly, and affect the sub-system and equipment later. The improvement of satellite mechanical environment will increase its launching reliability, reduce operating risk and cut down project cost.Statistical Energy Analysis method began in the 20th century 1960s aerospace industries, with the statistical point of view, from the perspective of energy to analyze complex structures under external loads response to the rapid and accurate simulation, high frequency acoustic characteristics, but also to effectively predict structural vibration products.This paper firstly introduces SEA experimental measurement technique on loss factor. According to the theoretical formula and experiment data, both the damping loss factor and coupling loss factor can be calculated. By the result comparison between experiment and AutoSEA simulation, AutoSEA is regarded as more accurate and credible dynamic analysis method. Secondly, AutoSEA provide powerful capacity on 3D modeling and diversified load setting. On the solving segment, the vibration response of energy unit for each subsystem can be expressed by pictures. Thirdly, line isolator, constrained damping layer and active payload adapter are combined within this model to realize the effective isolation.This paper fully illustrates the powerful calculating function of statistical energy analysis and AutoSEA on high frequency model. For future V&N research, SEA will show one of the most potential theories. Meanwhile, the integrative isolation design is highly efficient and economical for improving the intense vibration response to mechanical environment.