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굽힘 파동 전달 특성을 이용한 빔 형상 구조물의 결빙 감지 기법
박인기(Inki Park),박준홍(Junhong Park) 한국소음진동공학회 2019 한국소음진동공학회 논문집 Vol.29 No.2
In this study, the flexural wave propagation characteristics were used to detect the ice formed on an aircraft wing. In an environmental test chamber, ice was made on a beam simulating an aircraft wing. Vibration was induced to the beam with an excitation shaker in the audio frequency range. The ice enveloped the upper surface of the wing-shaped beam. By measuring the vibration responses, dynamic characteristics were estimated by predicting the wave propagation on the beam and the ice structure. Young’s modulus of the effective complex beam varied significantly over the frequency range with the ice-covered beam. The dynamic characteristics estimated using this method were not sensitive to the temperature variation tested in this study. This method may allow the effective detection of ice formation in actual operating conditions of an aircraft.