大工13秋《工程力学(一)》在线作业3（Engineering mechanics work 13 autumn (a) online homework 3）.docVIP

大工13秋《工程力学(一)》在线作业3（Engineering mechanics work 13 autumn (a) online homework 3） Great works 13 autumn Engineering Mechanics (1) online homework 3 Total score: 100 test time: - test scores: 82 Single question judgment First, radio questions (10 questions, 60 points) Score: 42V 1. cuts a beam or single rigid knot, equivalent to removing (a) an excess constraint. A. 1 B. 2 C. 3 D. 4 The correct answer: C Full Score: 6 points: 6 In the 2. span, the simply supported beam at the end of the concentrated force F is taken, and the magnitude of the shear force across the middle section of C is (). A. F/2 B. -F/2 C. F D. is uncertain The correct answer: D Full Score: 6 points: 0 3. about the principle of virtual work of deformable bodies, the following statement is incorrect. A. the external force system must be a balanced force system B. displacement must satisfy the conditions of virtual displacement C. force and displacement are related between the two states D. is applicable to any deformable body of force deformation relation The correct answer: C Full Score: 6 points: 6 4., the moment distribution method is used to calculate the lateral displacement of the rigid frame, and the transfer coefficient is equal to the vertical support of the uniform straight rod. A. 0 B. 0.5 C. 1 D. -1 The correct answer: D Full Score: 6 points: 0 5. the reasonable axis of the three hinged arch is under the action of radial uniform load. A. arc line B. parabola C. catenary D. sine curve The correct answer: A Full Score: 6 points: 6 6. the following options do not belong to the premise of the multiplication of the graph to calculate the displacement. The A. bar section is a straight rod with equal section The physical parameters of each rod section of B. are constant At least one of the integrand of C. is a straight line figure D. two integrand are straight lines The correct answer: D Full Score: 6 points: 0 7. when the support of the statically determinate structure moves. The A. member has n