Tham khảo tài liệu 'bruhn - analysis and design of flight vehicles structures episode 1 part 9', 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 AS. 43 Influence coefficients Ans 1 Re-solve the Ubly redundant beam or Example Problem B page by matrix methods. The redundant reactions should be given ftq symbols. See Example Problem 13a page . 13 Re-solve Example Problem 5 page by matrix methods. For simplicity make your choice of generalized forces Including those designated as X and Y in the example so that Figs. and can be used to give the gỉr loadings. 14 By matrix methods re-solve Example Problem 4 p. using 3 equal bay divisions along the panel 3 times redundant . Use the same structural dimensions as In Example Problem 20 p. . Compare the results with those obtained from the formulas developed m Example Problem 4. 15 Show that the matrix equation eq. 21 Is modified to cover the Initial stress problems of Art. by writing jjrsj QsJ - ậrn n ESrll where At Is the Initial Imperfection associated with force Qj. Refer to the argument leading to eq. 11 of Art. . 16 Using the equation of problem 15 above re-solve Example Problem 6 p. . 17 Using the equation of problem 15 above re-solve Example Problem 7 p. . 18 Using the matrix methods of Art. re-solve Example Problem 9 p. . 19 For the doubly symmetric four flange box beam of Example Problem 15 p. determine the redundant stresses q q and qia if one flange Is heated to a temperature T uniform spanwise above the remainder of the structure. Ans. 2081 J 1599 741 I REFERENCES. See references at the end of Chapter A-7. Douglas DC 8 airplane. Photograph showing simulated aerodynamic load being applied to main entrance door of fuselage test section. A8. 44 STATICALLY INDETERMINATE STRUCTURES PROOF TEST OF DOUGLAS AIRCRAFT MODEL DC-6 DOUGLAS DC-8 AIRPLANE. An outboard engine pylon mounted on a section of wing for static and Rutter tests. The steel box represents the .
