표제지
국문 요약
목차
제1장 서론 10
1.1. 연구배경 및 목적 10
제2장 수치해석 방법 14
2.1. FSI 해석의 개요 14
2.2. 열유동 전산해석 17
2.2.1. 지배방정식 17
2.2.2. 난류모델 18
2.3. 구조해석 20
제3장 알루미늄 합금 차체 열유체-구조 연성해석 22
3.1. 수치해석 방법 22
3.1.1. 수치해석 모델 22
3.2. 열유동 전산해석 25
3.2.1. 수치격자 25
3.2.2. 경계조건 26
3.2.3. 전산해석 결과 28
3.3. 구조해석 32
3.3.1. 구조해석 방법 32
3.3.2. 구조해석 격자 33
3.3.3. 구조해석 결과 34
제4장 알루미늄 합금 차체 열변형 실험 43
4.1. 실험방법 및 실험장치 43
제5장 수치해석과 실험 비교 47
5.1. 열유동 해석과 열화상카메라를 이용한 온도 분포 비교 47
5.2. 구조해석과 3D 스캐너를 이용한 열변형 비교 51
제6장 결론 53
참고문헌 54
Abstract 56
Table. 1. Electric automotive sales 10
Table. 2. GHG standards of major automobile producing countries 11
Table. 3. Automotive OEM CO2 Emissions 11
Table. 4. Comparison of properties of steel and lightweight materials 11
Table. 5. The Analysis case 24
Table. 6. Boundary condition 26
Table. 7. Material properties of Silafont-36 33
Table. 8. Chemical composition of Silafont-36 43
Table. 9. Thermal imaging camera specifications 45
Table. 10. 3D scanner specification 45
Fig. 1. Aluminum alloy Automotive body 12
Fig. 2. Automotive body parts made of Silafont36 13
Fig. 3. FSI Analysis Method Conceptual Diagram 15
Fig. 4. Numerical analysis procedure 16
Fig. 5. Modeling of Automotive part and Jig 23
Fig. 6. (a) 3UP-1L Air nozzle position (b) 4UP-1L Air nozzle position 24
Fig. 7. CFD Grid system 25
Fig. 8. A schematic of computational domain 27
Fig. 9. Average temperature graph of automotive part 29
Fig. 10. Temperature distributions of automotive part by heating 30
Fig. 11. Temperature distributions of automotive part by cooling method 31
Fig. 12. Example picture of data mapping 32
Fig. 13. Example picture of data code 32
Fig. 14. FEM grid system 33
Fig. 15. Thermal deformation amount from 0s to 1800s when heating automotive parts 35
Fig. 16. Thermal deformation during cooling in NA(natural convection) case 37
Fig. 17. Thermal deformation during cooling in 3UP1L(forced convection) case 39
Fig. 18. Thermal deformation during cooling in 4UP1L(forced convection) case 41
Fig. 19. Y-axis thermal deformation at red point 42
Fig. 20. T6 heat treatment process 43
Fig. 21. (a)Before graphite spray application (b)After graphite spray application 44
Fig. 22. Heat treatment furnace 44
Fig. 23. FLIKE-RES300 45
Fig. 24. (a) 3D scanner (b) laser 45
Fig. 25. Experimental equipment 46
Fig. 26. Comparison of NA case experiment and CFD temperature distribution 48
Fig. 27. Comparison of 3UP1L case experiment and CFD temperature distribution 49
Fig. 28. Comparison of 4UP1L case experiment and CFD temperature distribution 50
Fig. 29. Comparison of FEM and 3D scanner 52