표제지
목차
Abstract 8
I. 서론 10
1. 연구 배경 및 목적 10
2. 연구 범위 12
II. 연구내용 14
1. KPP 성능 및 착륙장치 형식 결정 14
1) KPP Aircraft Design Specification (ADS) 분석 14
2) KPP 착륙장치 형식 15
2. KPP 착륙장치 배치설계 (Layout) 18
1) MLG Static Ground Point 배치 18
2) NLG Static Ground Point 배치 18
3) 착륙장치 정적 하중 배분 고려사항 19
4) 착륙장치 Turn-over Angle 및 MLG Tread 19
3. KPP 착륙장치 성능/하중해석 20
1) KPP Sink Speed 20
2) Basic Landing Condition Loads 21
3) 착륙장치 Stroke 계산 22
4) 하중계산과 착륙장치 배치 설계 Iteration 24
4. RSM(Response Surface Methodology) 기법을 이용한 주륜착륙장치 최적 설계 26
1) 4340 Steel의 재질 특성 27
2) 최적화 기법 27
3) KPP 주륜착륙장치의 최적화 설계 38
IV. 결론 53
참고 문헌 55
Table 1. Leaf spring type vs. oleo-pneumatic type shock absorber comparison 16
Table 2. Fixed vs. retractable type comparison 16
Table 3. Basic landing condition load analysis results 21
Table 4. NLG/MLG stroke calculation results 24
Table 5. Load iteration results by in-house S/W 25
Table 6. MLG strut test points 39
Table 7. ADAMS analysis results 43
Table 8. R² adj values of regressions(이미지참조) 47
Table 9. Optimized strut 47
Table 10. 15 test point models and anlaysis results 50
Table 11. KPP analysed model vs. optimization value comparison 52
Fig. 1. Landing gear design optimization process 13
Fig. 2. KPP P300 configuration 14
Fig. 3. MLG tire curve 17
Fig. 4. NLG tire curve 17
Fig. 5. MLG ground contact point layout 18
Fig. 6. NLG ground contact point layout 19
Fig. 7. Turn-over angle & MLG wheel tread layout 20
Fig. 8. Ideal shock absorbing diagram 22
Fig. 9. KPP landing gear systems layout design 25
Fig. 10. Response surface process 31
Fig. 11. Full factorial method for 3 design variables 33
Fig. 11. CCD method for 3 design variables 34
Fig .12. Result of D-Optimal method for 3design variables 35
Fig. 13. Main landing gear strut basic configuration 38
Fig. 14. Case 1 40
Fig. 15. Case 2 40
Fig. 16. Case 3 41
Fig. 17. Case 4 41
Fig. 18. Case 5 42
Fig. 19. ADAMS analysis model (Case 1) 43
Fig. 20. Case 1 ADAMS analysis results 44
Fig. 21. Case 2 ADAMS analysis results 44
Fig. 22. Case 3 ADAMS analysis results 45
Fig. 23. Case 4 ADAMS analysis results 45
Fig. 24. Case 5 ADAMS analysis results 46
Fig. 25. Optimized MLG strut 48
Fig. 26. ADAMS interface model 51
Fig. 27. KPP analysed model ADAMS simulation results 51