서지주요정보
탄성원형 평판에 탄성구의 충돌로 인한 음압복사 = Sound radiation from the impact of a ball on elastic circular plates
서명 / 저자 탄성원형 평판에 탄성구의 충돌로 인한 음압복사 = Sound radiation from the impact of a ball on elastic circular plates / 김도중.
저자명 김도중 ; Kim, Do-Joong
발행사항 [서울 : 한국과학기술원, 1983].
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소장정보

등록번호

4102194

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 8304

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초록정보

In this thesis, sound radiation from the impact of balls on elastic plates with various velocities have been examined by the theoretical and experimental works. In order to obtain the characteristics of the contact force, dynamic response and sound field from the impact of a ball on elastic circular plates, a theoretical approach and some experiments have been performed. In the theoretical development the Hertz contact theory, plate vibration and acoustics were employed. Sound generation are due to radiation from the suddenly accelerated ball-sphere and radiation from the vibrating plate. The experimental studies have been made of the sound generated by the impact of balls onto plates, ranging in radius of the circular plates from 7 to 14 cm and in their thickness from 1.2 to 3 mm. Steel balls, ranging in size from 1.502 to 2.84 cm in diameter, were used in a series of experiments in which the balls were impacted on to the center of the plate with various velocities. Momentum change and plate motions were also measured to aid in identification of the mechanisms of sound generation. The experimental results of the momentum change, contact force, transient vibratory motion and maximum sound pressure from the impact were compared with theoretical results. It was found that experimental results were well matched with theories. Momentum of the ball can be transfered to the plate by not only one contact but also two or three contacts. Such a multi-contact occured during one impact are appeared predominantly when large balls impact thin plates. The major contribution on the peak sound pressure radiated from the impact of a ball on an elastic plate is due to the flexural vibration of the plate but not of the acceleration of the ball.

서지기타정보

서지기타정보
청구기호 {MME 8304
형태사항 vi, 75 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Do-Joong Kim
지도교수의 한글표기 : 이병호
지도교수의 영문표기 : Byung-Ho Lee
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 41-42
주제 Sound radiation pressure.
Impact.
Vibration --Research.
Momentum transfer.
탄성 역학. --과학기술용어시소러스
음압. --과학기술용어시소러스
음파 방사. --과학기술용어시소러스
음향 방출. --과학기술용어시소러스
충격파. --과학기술용어시소러스
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