표제지
요약문
Abstract
목차
제1장 서론 11
제2장 이론적 배경 12
2.1. 방진 이론과 효율 12
2.1.1. 방진이론 12
2.1.2. 방진효율 14
2.1.3. 2차 시스템 (Second-order System) 14
2.1.4. 2차 시스템의 모델링 15
2.1.5. 2차 시스템의 운동방정식 표준형 16
2.1.6. 2차 시스템의 운동/진동 종류 16
2.1.7. 2차 시스템의 전달함수 (2차 폐루프 제어시스템) 17
2.2. 탄성마운트 18
2.2.1. 함정용 펌프장비 탄성마운트 설치 19
2.2.2. 이중 탄성마운트 20
2.2.3. 탄성마운트 특성 20
2.2.4. 탄성마운트 설치 펌프장비 21
2.3. 특수성능 시험 22
2.3.1. 충격 시험 22
2.3.2. 진동 시험 25
2.3.3. 공기소음 시험 25
2.3.4. 구조소음 시험 26
2.4. 탄성마운트 위치에 따른 해석 27
2.4.1. 정적 해석 27
2.4.2. 진동 해석 28
2.4.3. 충격 해석 29
2.5. 탄성마운트 최적 설계법 33
2.5.1. 목적 함수 33
2.5.2. 설계 변수 34
2.5.3. 구속 조건 34
2.6. 무게중심 계산 35
2.6.1. 총질량 35
2.6.2. 질량중심 35
2.6.3. 좌표계 35
제3장 시험방법 36
3.1. 탄성마운트 설치 및 시험 36
3.3.1. 펌프장비 탄성마운트 설치 37
3.3.2. 탄성마운트 적용 40
3.2. 펌프장비 시험 방법 42
3.2.1. 구조전동 시험 방법 42
3.2.2. 공기소음 측정 방법 43
3.2.3. 내충격 시험 방법 44
제4장 결과 및 고찰 45
4.1. 구조소음 특성 46
4.2. 공기소음 특성 56
4.3. 내충격 특성 58
제5장 결론 61
참고 문헌 62
Table 1. Performance evaluation and requirements of motor pump 22
Table 2. MIL-S-901D shock test 22
Table 3. Airborne noise acceptance criteria 25
Table 4. Structure-borne noise acceptance criteria (TYPE-II) 26
Table 5. Experiment condition (pump specifications and the number of mount) 36
Table 6. Calculation value of center of gravity of centrifugal pump 37
Table 7. Calculation value of center of gravity of screw pump 37
Table 8. Rubber elastic mount specification 40
Table 9. Specification for wire rope elastic mount 41
Table 10. Structure-borne vibration measurement conditions 42
Table 11. Measurement equipment of structure-borne vibration 42
Table 12. Airborne noise measurement conditions. 43
Table 13. Measurement equipment of airborne noise 43
Table 14. Shock measurement conditions 44
Table 15. Structure-borne noise measurement (fail data, point 1, point 2) 47
Table 16. Structure-borne noise measurement (fail data, point 3, point 4) 49
Table 17. Structure-borne noise measurement (pass data, point 1, point 2) 51
Table 18. Structure-borne noise measurement (pass data, point 3, point 4) 53
Table 19. Airborne noise results 56
Table 20. Motor pump functional inspection after impact test results 58
Fig. 1. Single degree of freedom system vibration model. 12
Fig. 2. Change in transmissibility by frequency ratio graph. 13
Fig. 3. Single degree of freedom system and free body diagram. 15
Fig. 4. Various elastic mounts. 18
Fig. 5. Elastic mount installation plot. 19
Fig. 6. Noise transfer graphs for dual mount structures. 19
Fig. 7. Elastic mount installation photographs (centrifugal pump). 21
Fig. 8. Elastic mount installation photographs (screw pump). 21
Fig. 9. Light weight impact test equipment. 23
Fig. 10. Medium weight impact test equipment. 23
Fig. 11. Relations between the peak acceleration of anvil table and... 24
Fig. 12. Vibration acceptance criteria for type II vibration (MIL-STD-167-1A:2005, TYPE II). 25
Fig. 13. Structure-borne vibratory acceleration acceptance Criteria (MIL-STD-740-2B). 26
Fig. 14. Elastic mount installation drawing. 27
Fig. 15. Elastic mount installation photograph. 36
Fig. 16. Individual position (a-1), full position (a-2) schematic diagram of the center of... 38
Fig. 17. Individual position (b-1), full position (b-2) schematic diagram of the center of... 39
Fig. 18. Rubber elastic mount (YVM) and rubber elastic mount (YVRM). 40
Fig. 19. Wire rope elastic mount drawing (top) and wire rope elastic mount... 41
Fig. 20. Structural vibration measurement positions. 42
Fig. 21. Airborne noise measurement positions and photos. 43
Fig. 22. Medium weight impact test environment. 44
Fig. 23. Installation of elastic mount using center of gravity (centrifugal pump). 45
Fig. 24. Installation of elastic mount using center of gravity (screw pump). 45
Fig. 25. Double-mount structure noise test illustration. 46
Fig. 26. Illustration of the location of the vibration sensor attachment. 46
Fig. 27. Structure-borne noise measurement (fail data, point 1). 48
Fig. 28. Structure-borne noise measurement (fail data, point 2). 48
Fig. 29. Structure-borne noise measurement (fail data, point 3). 50
Fig. 30. Structure-borne noise measurement (fail data, point 4). 50
Fig. 31. Structure-borne noise measurement (pass data, point 1). 52
Fig. 32. Structure-borne noise measurement (pass data, point 2). 52
Fig. 33. Structure-borne noise measurement (pass data, point 3). 54
Fig. 34. Structure-borne noise measurement (pass data, point 4). 54
Fig. 35. Difference between acceptance criteria and structure-borne... 55
Fig. 36. Picture of airborne noise measurement. 56
Fig. 37. Airborne noise results. 57
Fig. 38. centrifugal pump impact test (vertical) 59
Fig. 39. centrifugal pump impact test (30°inclined / side down). 59
Fig. 40. Screw pump impact test (vertical). 60
Fig. 41. Screw pump impact test (30°inclined / side down). 60