다양한 평판구조물 진동에 대한 파워흐름해석법의 실험적 연구 = Experimental Study On Power Flow Analysis of Vibration of Various Plate Structures

다국어 초록 (Multilingual Abstract)

The purpose of this thesis is to perform the experimental study on the power flow analysis of the vibration of various plate structures. In the experimental work, the characteristics of vibration of the various plate structures have been measured, which include input mobilities, loss factors, coupling loss factors and frequency response functions. The experimental models includes a simple plate, a plate covered with a damping material, a plate coupled with 90˚angle and a plate coupled with 30˚angle. The input mobilities and loss factors of the simple plate and plate covered with the damping material have been measured. Each coupled plate was divided into 2 subsystems considering the patterns of vibration on the corresponding coupled plate. The input mobility, loss factor and coupling loss factor of each subsystem of the corresponding coupled plate have been measured. Each subsystem of the corresponding coupled plate has been excited and the frequency response functions have been measured on the coupled plate. In the analytical work, the power flow analysis has been implemented to predict the frequency response functions of the coupled plates. The predicted results have been compared with the experimental results for the frequency response functions of the coupled plates. The comparison showed that the power flow analysis can be effectively used to predict the vibration of the coupled plates.

목차 (Table of Contents)

• 1. 서론 = 1
• 2. 평판구조물의 진동 해석 = 4
• 2.1 평판 진동의 일반해 = 4
• 2.1.1 단순 평판 진동의 일반해 = 4
• 2.1.2 연성평판 진동의 일반해 = 7
• 2.1.3 힘과 변위의 경계조건 = 9
• 2.2 연성된 평판 진동의 파워흐름해석[12.13] = 11
• 2.2.1 에너지 지배방정식 = 11
• 2.2.2 에너지 밀도와 인텐시티의 일반해 = 12
• 2.2.3 에너지와 파워의 경계조건 = 14
• 3. 실험 해석 이론 = 17
• 3.1 입력파워(Input Power) = 17
• 3.2 입력 모빌리티(Input Mobility) = 17
• 3.3 모드밀도(Mode Density) = 18
• 3.4 모드 수(Mode Number) = 19
• 3.5 내부손실계수(Damping Loss Factor) = 19
• 3.6 연성손실계수(Coupling Loss Factor) = 22
• 3.7 파워투과 및 반사계수(Transmission & Reflection) = 26
• 4. 실험 및 신호분석 환경 = 29
• 4.1 가진부 = 29
• 4.2 측정 센서 = 30
• 4.3 신호분석기 = 31
• 4.4 신호처리 = 32
• 5. 실험 및 결과 = 37
• 5.1 단순평판의 진동 특성 실험 = 37
• 5.2 제진평판의 진동 특성 실험 = 38
• 5.3 연성평판의 진동 특성 실험 = 40
• 6. 결론 = 86
• 참고 문헌 = 87
• 본 석사 논문과 관련된 발표 논문 = 90
• ABSTRACT = 92