표제지
요약
목차
기호설명 12
I. 서론 13
1.1. 연구배경 13
1.2. 연구목적 및 범위 16
II. 이론적 고찰 17
2.1. 다이어프레임의 요구사양 17
2.1.1. 개요 17
2.1.2. 세부사양 18
2.2. 유한요소해석 19
2.3. 최적설계 21
III. 유한요소해석 결과 24
3.1. 다이어프레임의 초기설계안 24
3.1.1. 3차원 CAD 모델 24
3.1.2. 유한요소모델 25
3.1.3. 구조재 물성특성 26
3.2. 정특성 해석결과 27
3.3. 동특성 해석결과 30
IV. 최적설계 결과 34
4.1. 설계변수 및 목적함수 설정 34
4.2. 최적설계 결과분석 42
V. 다이어프레임 제작 및 평가 47
5.1. 다이어프레임 제작 47
5.2. 양방향 워셔 펌프 모터성능 평가 50
VI. 결론 52
참고문헌 54
Abstract 55
Table 3-1. Dimensions of initial design variables 25
Table 3-2. Properties for finite element mode 26
Table 3-3. Comparison of material properties for diaphragm 26
Table 3-4. Chemical properties for Diaphragm material 27
Table 4-1. Dimensions for structural optimization for diaphragm 35
Table 4-2. The range of optimal design constraints 39
Table 4-3. Comparison of design variables before/after optimization of diaphragm 46
Table 4-4. Comparison of stiffness variation before/after optimization of diaphragm 46
Table 5-1. Dimensions of diaphragm 49
Fig. 1-1. The overall appearance of the wiper system and washer system 14
Fig. 1-2. Holder A/B of the assembled structure 15
Fig. 2-1. Flow chart of simulated annealing method for optimization of diaphragm design 23
Fig. 3-1. Initial design of diaphragm 24
Fig. 3-2. Finite element model for diaphragm 25
Fig. 3-3. Distribution of static displacement of diaphragm 28
Fig. 3-4. Distribution of Von Mises Stress of diaphragm 28
Fig. 3-5. Comparison of static displacement with respect to thickness of the outer at I.D=6.2mm, T.I=0.8mm 29
Fig. 3-6. Comparison of static displacement with respect to inside diameter at T.O=0.4mm, T.I=0.8mm 29
Fig. 3-7. Comparison of static displacement with respect to thickness of the inner at T.O=0.4mm, I.D=6.2mm 30
Fig. 3-8. Distribution of dynamic displacement of diaphragm 31
Fig. 3-9. Displacement of diaphragm 1st mode shape 32
Fig. 3-10. Comparison of natural frequency of diaphragm with respect to thickness of the outer at I.D=6.2mm, T.I=0.8mm 32
Fig. 3-11. Comparison of natural frequency of diaphragm with respect to inside diameter at T.O=0.4mm, T.I=0.8mm 33
Fig. 3-12. Comparison of natural frequency of diaphragm with respect to thickness of the inner at T.O=0.4mm, I.D=6.2mm 33
Fig. 4-1. Design variables of diaphragm for design optimization 35
Fig. 4-2. Assignment process for optimal design variables on CATIA product engineering optimizer 36
Fig. 4-3. Assignment of initial design variables on CATIA product engineering optimizer 38
Fig. 4-4. Assignment of optimal design constraints ranges 38
Fig. 4-5. Output display of final optimal design variables on CATIA product engineering optimizer 41
Fig. 4-6. Final optimization result for diaphragm design on CATIA product engineering optimizer 43
Fig. 4-7. Distribution of static displacement of diaphragm after design optimization 44
Fig. 4-8. Distribution of Von Mises stress of diaphragm after design optimization 44
Fig. 4-9. Distribution of dynamic displacement of diaphragm after design optimization at 1st mode shape 45
Fig. 4-10. Distribution of Von Mises stress of diaphragm after design optimization at 1st mode shape 45
Fig. 5-1. System configuration of developed 2way washer pump motor system 48
Fig. 5-2. Diaphragm holder A/B assembly process 50
Fig. 5-3. Measurement result of leakage 51
Fig. 5-4. Front & Rear hydraulic pressure test 51