Tham khảo tài liệu 'bruhn - analysis and design of flight vehicles structures episode 2 part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | ANALYSIS AND DESIGN OF FLIGHT VEHICLE STRUCTURES TABLE Section Properties at sta. 30 Total Stringer Loads at sta. 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 z y ơc F 2 a .Pg stringer Area Arm Arm az az 2 ay ay 2 az y ơb No. a 2 y z - z y - ỹ -1500 a ơb ơc a .50 4. 90 48. 1 -5. 60 -14800 -503 -7651 b . 10 - -0. 79 18. 82 -21090 -503 -2159 c .10 0 0 0 0 22. 10 - -21447 -503 -2195 d . 10 17. 72 1. 77 -15647 -503 -1615 e .68 6. 47 - 7088 -503 -5011 f .66 - -6. 47 - -11282 -503 7100 . g . 20 -3 54 5. 81 -17583 -503 3416 h .20 0 -4 20 0 0 0 - 17943 -503 3489 1 . 20 - 7 92 12135 -503 2327 i .26 - -2 55 28. 6 - 3570 -503 797 Sum 2. 98 6. 28 -1500 Reference Z and Y axes are taken as the centerline axes. z -3. 29 -1. 10 ỷ 6. 28 ly 520. 2 - 2. 98 X 1. Ĩ02 516. 6 Iz 299. 2 - X 2. Il2 lZy - X 2. 11 X -1. 10 _h S 0 and. the similar columns of Table gives the calculations for station 30 . Before the bending and shear stresses can be calculated the external bending moments shears and normal forces at stations 0 and 30 must be known. At station 0 - The bending moment about y neutral axis at station 0 equals My Pz 150 Px 4000x150 611300 . Mz - py 150 - Px -1000x150 1500 x -146310 . The shears at station 0 are vz Pz -4000 Vy py -1000 lb. The normal load Pn at station 0 referred to centroid of section equals zpx -1500 lb. In a similar manner the values at station 30 are see Fig. My 4000x120 492150 . Mz -1000x120 116820 pn -1500 lb. vz 4000 lb. Vy -1000 lb. Calculation of
