34 11 2012 11 SHIP SCIENCE AND TECHNOLOGY Vol. 34 No. 11 Nov. 2012 0 430064 GB150-98 ASME THR3 +. 4 A 1672-7649 2012 11-0075 - 07 doi 10. 3404 /j. issn. 1672-7649. 2012. 11. 017 Stress and fatigue analysis of clamp connection structure of decompression chambers SHI Zhan-xin GAN Lin Wuhan Second Ship Design and Research Institute Wuhan 430064 China Abstract The clamp connections are widely used in quick opening set this paper analyzes and discusses the stress of shell flange-end and clamp connection by use of GB150-98 and ASME criterion the advantage and disadvantage of the two standards are present. In addition the FEM is used to calculate the contact stress distribution disciplinarian and fatigue life which give some suggestions for design and intensity analysis of the clamp connections. Key words clamp connections finite element analysis fatigue 1 O 4 700 mm 3 MPa GB150 1 ASME Ⅷ 2-18 ~ + 55 16 Mn σ t = 150 MPa 1 2 2. 1 GB150-1998 G7 O 60 E 3. 5 MPa 740 mm 10 mm 0. 25 F =1 289 598 N F a =20 057 N 2011-12 - 28 2012-01 - 09 1983 -
76 34 2. 1. 1 Fig. 1 1 a-a b-b a-a σ ma = 74. 4 MPa σ a = 15. 74 MPa σ 0a =90. 15 MPa 0. 9 σ t =135 MPa b-b σ mb = 21. 77 MPa τ b = 13. 789 MPa σ 0b =32. 3 MPa 0. 9 σ t =135 MPa 2. 1. 2 1 The clamp connections of quick opening set 1 a-a b-b a-a σ ma = 151. 13 MPa σ a = 29 MPa σ 0a =180 MPa 0. 9 σ t =135 MPa b-b σ mb = 24 MPa τ b = 14 MPa σ 0b =35. 29 MPa 0. 9 σ t =135 MPa 5. 2 a-a σ 0 a 2. 2 ASME Ⅷ 24 ASME GB150 2. 2. 1 S 1 S 3 S 1 = 194 MPa < 225 MPa GB150 S 2 = 56. 8 MPa < 150 MPa S 3 = 19. 877 MPa < 120 MPa S 4 = 12. 5 MPa < 120 MPa 2. 2. 2 S 5 = 106. 71 MPa < 225 MPa S 6 = 81. 86 MPa < 225 MPa S 7 = 21. 54 MPa < 120 MPa S 8 = 12. 73 MPa < 150 MPa S 9 = 35. 42 MPa < 240 MPa 2. 3 GB150 ASME GB150 GB150 3 3. 1 1 /4
11 77 2. 5 槡 Rδ 220 mm 3. 2 3. 2. 1 solid95 contact170 target174 3 2 2 Fig. 2 The FEM of the clamp connections 3. 2. 2 1 7. 8 t 3 MPa 740 mm 12. 415 MPa 3 MPa 12. 41 MPa 1 1 3 0. 15 2 7. 8 t 0. 74 MPa 3 4 3. 3 PCG 5 ~ 12
78 34 5 ~ 12 Hertz 4 4. 1 1 9 13 4. 2 Ansys Membrane Bending Membrane Plus Bending Peak Total 14 ~ 22
11 79
80 34 4. 3 4 16 Mn S m = 150 MPa Tab. 1 1 1 The mises stress assess in condition one 1 /MPa MPa A-A B-B C-C D-D E-E F1-F1 F2-F2 F3-F3 G-G P L + P b 141. 8 P L + P b 1. 5 S m = 225 P L + P b + Q 160. 2 P L + P b + Q 3 S m = 450 P L + P b 109. 6 P L + P b 1. 5 S m = 225 P L + P b + Q 160. 2 P L + P b + Q 3 S m = 450 P L + P b 94. 29 P L + P b 1. 5 S m = 225 P L + P b + Q 148. 6 P L + P b + Q 3 S m = 450 P L + P b 64. 72 P L + P b 1. 5 S m = 225 P L + P b + Q 148. 6 P L + P b + Q 3 S m = 450 P L + P b 51. 13 P L + P b 1. 5 S m = 225 P L + P b + Q 93. 94 P L + P b + Q 3 S m = 450 P L + P b 57. 94 P L + P b 1. 5 S m = 225 P L + P b + Q 79. 02 P L + P b + Q 3 S m = 450 P L + P b 79. 67 P L + P b 1. 5 S m = 225 P L + P b + Q 84. 985 P L + P b + Q 3 S m = 450 P L + P b 53. 02 P L + P b 1. 5 S m = 225 P L + P b + Q 72. 06 P L + P b + Q 3 S m = 450 P L + P b 52. 31 P L + P b 1. 5 S m = 225 P L + P b + Q 101. 2 P L + P b + Q 3 S m = 450 5 5. 1 1 /4 3 MPa 1 27. 56 MPa 1. 526 23 ~ 25
11 81 5. 2 Tab. 1 2 1 The stress comparison between fine mesh model and rule in condition one GB150 /MPa σ ma =151. 13 σ a = 28. 96 σ oa = 180. 1 σ mb = 23. 96 τ b = 14. 187 σ ob = 35. 29 ASTM /MPa S 1 = 193. 88 S 3 = 19. 877 /MPa 128. 9 26. 29 155. 2 21. 75 12. 47 30. 82 26 16 Mn S-N Fig. 26 The S-N fatigue curve of 16 Mn 7 S a = 125 MPa 1. 568 2 10 5 >4 800 GB150-98 JB4732 ASME 6 6. 1 JB4 732 ASME 1 000 S-N 30 4 800 2 ASME 1 2 1 GB150-98 S. 1 2 2 ASMEⅧ - 1 - S. Mises 2 S a 3. ANSYS 30 M. 164 MPa 1. 526 2010. 175-190. 250 MPa 3 S m 450 GAO Yao-dong. The thirty essence examples of mechanical MPa engineering application M. Beijing Publishing House of S a = 125 MPa Electronics Industry 2010. 175-190. 6. 2 ASME Ⅷ - 2 2010 ANNEX3. F DESIGN 4 JB4732-95 S. 5 ASMEⅧ-2 - S. FATIGUE CURVES σ uts 552 MPa 6. J. 3. F. 1 2008 37 1 30-34. Matkab 26 FAN Wan-chun WANG Yong-wei. Stress analysis of quick- opening clamp structure J. Petro-Chemical Equipment 2008 37 1 30-34.