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第1,2,3,10题为填充题,只要求写结果,不要求写解题过程.其他各题要求解题过程.1.图1.1所示平衡系统中,物体Ⅰ,Ⅱ,Ⅲ,Ⅳ之间分别通过光滑铰链 A,B,C 连接.O,E 为固定支座,D,F,G,H 处为杆约束.尺寸如图,b/a=1.5.物体Ⅱ受大小为 m 的力偶作用.假定全部力均在图示平面内,且不计所有构件的自重,杆 O_3G 的内力不为零,则杆 O_4H 与杆 O_5H 所受内力之比为______(要求计算三位有效数字).
The first, second, third, and tenth questions are filled-in questions. Only the results are required and the problem-solving process is not required. The other questions require the problem-solving process. 1. In the balanced system shown in Figure 1.1, objects I, II, III, The IV is connected by the smooth hinges A, B, and C, respectively. The O, E are the fixed bearings, and the D, F, G, and H are rod restraints. The dimensions are shown in the figure, b/a=1.5. The object II is affected by the size m. The couple’s role. Assuming all the forces are in the plane of the figure, and regardless of the weight of all components, the internal force of the rod O_3G is not zero, then the ratio of the internal force of the rod O_4H to the rod O_5H is ______ (requires to calculate three significant digits ).