표제지
목차
I. 서론 8
1.1. 연구배경 8
1.2. 연구의 필요성과 관련 현황 9
1.2-1. 연구의 필요성 9
1.2-2. 메인 드라이브 실린더의 기능 및 역할 12
1.3. 실린더 튜브의 두께에 대한 이론해석 13
II. 구조해석 14
2.1. 해석모델 및 격자생성 14
2.2. 경계조건 및 해석 결과 16
III. 좌굴해석 21
3.1. 해석모델 및 격자생성 21
3.2. 경계조건 및 해석 결과 23
IV. 유동해석 28
4.1. 해석모델 및 격자생성 28
4.2. 경계조건 30
4.3. 해석결과 32
V. 결론 54
참고문헌 55
국문요약 56
ABSTRACT 57
Table 1. Pressure-station safety coefficient 13
Table 2. Mesh information of cylinder for stress analysis 15
Table 3. Material properties of cylinder for stress analysis 16
Table 4. Mesh information for buckling analysis 22
Table 5. Material properties for buckling analysis 23
Table 6. Load multiplier of each mode shape 27
Table 7. Mesh information of cylinder for flow analysis 30
Table 8. Properties of lubricant ISO VG 46 30
Fig. 1. Concrete pump truck 10
Fig. 2. Structure of a concrete pump truck 11
Fig. 3. Main drive cylinder 12
Fig. 4. Main components of main drive hydraulic cylinder 14
Fig. 5. Grid generation of cylinder for stress analysis 15
Fig. 6. Boundary conditions of stress analysis 17
Fig. 7. Results of stress analysis of cylinder 18
Fig. 8. Max. equivalent Stress variation vs tube thickness 19
Fig. 9. Safety factor variation vs tube thickness 20
Fig. 10. Grid generation of cylinder for buckling analysis 22
Fig. 11. Total deformation of each mode shape 26
Fig. 12. Grid generation for transient flow analysis 29
Fig. 13. Piston boundary condition 31
Fig. 14. Pressure distribution as piston moves forward 36
Fig. 15. Speed distribution as piston moves forward 41
Fig. 16. Pressure distribution as piston moves backward 46
Fig. 17. Speed distribution as piston moves backward 51
Fig. 18. Change in flow as you move forward 52
Fig. 19. Change in flow as you move backward 53