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항공기 외부 장착물 장착 경계조건의 중력 방향에 따른 동특성 영향 분석
박지환(Jihwan Park),정회인(Hoein Jeong),이유경(Yukyoung Lee),안선규 (Sungyu Ahn) 한국소음진동공학회 2020 한국소음진동공학회 논문집 Vol.30 No.5
In order to verify durability in the vibration environment of the Swaybrace-Lug mounting type aircraft external store, vibration testing was carried out in accordance with the MIL-STD-810. The vibration test fixture transmits vibrations that began at the bottom of the test fixture in contrast to direct vibrations in the Swaybrace-Lug mounting structure. Therefore, the inherent frequency of vibration may vary due to the influence of the test fixture and the vibration applied to the store may become excessive. Additionally, reverse mount vibration test fixture was designed for direct attachment to the Swaybrace-Lug mounting structure. To confirm this hypothesis, the resonant frequency and resonant response of the forward mounting and reverse mounting were compared at the frequency of interest. Additionally, confirmation was done by applying the Modal Assurance Criterion to objectively identify dynamic differences in mode frequencies.