Vibro Acoustic Response of the Satellite Telescope (2nd Report, The Higher Frequency Response Analysis)

The goal of this research is to analyze vibration response when the main mirror in a Satellite Solar-B optical telescope assembly (OTA) is subjected to an acoustic load. Specifically, in this second report, we focused on high frequency band vibration in which the satellite's local vibration mode is the main vibration. First, we studied methods of analyzing the response of the OTA structure and calculated the response using a Statistical Energy Analysis (SEA) method. Next, we measured the response multiple from the OTA structure to the main mirror and multiplied this by the previous response analysis results of the OTA structure to calculate the response of the main mirror. Regarding response RMS, the calculation results and the acoustic test results matched with an error of less than 3 dB. During these studies, we also confirmed significant vibration attenuation effects in such structures as the shield tubes that we designed.