95年 - 95 淡江大學轉學考工程力學#55970

科目：轉學考-工程力學 | 年份：95年 | 選擇題數：0 | 申論題數：6

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所屬科目：轉學考-工程力學

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申論題 (6)

【已刪除】1. A rigid horizontal bar is supported by a hinge al A and by two steel cables BD and CE, which are of equal length L = 0.8 m，cross-sectional area A = 140 mm2, and E ~ 200 GPa. Please calculate the stress in each cable due to a force of 40 kN, applied as shown in Figure I. (20%)

【已刪除】2. Please determine the reactions R_Ax，R_Ay, R_By，R_Ey and Rf y of the cantilever structure as shown in Figure 2. (20%)

【已刪除】3. Please draw the shear and moment diagrams for the beam sliown in Figure 3. (20%)

【已刪除】4. The 200-kg glider B is being towed by airplane A, which is flying horizontally with a constant speed of 220 km/h. The low cable has a length r = 60 m and may be assumed to form a straight line. The glider is gaining altitude and when θ reaches 15°, the angle is increasing at the constant rate θ^•=5 deg/s. At the same time the tension in the tow cable is 1520 N for this position. Please calculate the aerodynamic lift L and drag D acting on the glider. (20%)

(a) the speed vb of the slider as it passes position B and

(b) the maximum deflection δ of the spring. (20%)