우주발사체 음향/진동 저감 및 시험 평가 기술

The current status of acoustic and vibration mitigation, test and evaluation technology for the space launch vehicle development is introduced in this paper. First, various dynamic loads exerted on a launch vehicle during its operation are summarized. Prediction methods of lift-off acoustic loads and designs of acoustic protection systems for launcher fairings are addressed. Vibration mitigation techniques, e.g., shock and vibration isolators for avionics, whole spacecraft vibration isolation system, dampers for struts, and damped composite sandwich panels are also covered. As test and evaluation techniques, full vehicle modal testing (ground vibration testing) and sinusoidal vibration testing methods are explained.