兰大《结构力学》春在线作业

1、兰大结构力学13春在线作业114 spring 13 autumn big orchid structural mechanics 13 spring online homework 1Total score: 100 test time: -Radio examinationJudgment questionRadio examination questions (20 questions, 60 points)1. figure 48. The shape of the structure M diagram is ()A.B.C.D.Full marks: 32. figure 36.

2、The axial force of rod 1 in the structure is ()A. 0B. -ql/2C. -qlD. -2qlFull marks: 33. Fig. 46 the critical load for the maximum bending moment of the section C under the action of the moving beam is (KN)A. 50B. 40C. 60D. 80Full marks: 34. in Figure 40, the influence line of the cross section of st

3、atically determinate beam C is ()A.B.C.D.Full marks: 35. figure 45 the relative horizontal displacement of the two points of the structure A (B)A.B.C.D.Full marks: 36. in any case, the system that adds a two dollar body to a geometrically variable system is a geometric systemA. variableB. transients

4、C. is invariant and without redundant constraintsD. invariant, there are two redundant constraintsHomework answer did not upload, first for everyone to review the use, if you need to answer the specific see my registration name to find perfect score: 3 points7. when the dynamic balance method is use

5、d to perform dynamic analysis, the inertia forceA. doesnt really existB. actually acts on a particleC. actually exists, but does not act on particlesD. vertical vibration exists, and other directions do not existFull marks: 38. commonly used structural types of bars include ()A. beam, arch, bent and

6、 so onB. beam, arch, rigid frame, etc.C. beam, arch, suspension structure, etc.D. beam, rigid frame, suspension structure, etc.Full marks: 39., figure 124, which cannot apply the dynamic coefficient method to calculate the dynamic displacement amplitudeA.B.C.D.Full marks: 310. The system with the sa

7、me internal force and displacement dynamic coefficient is calculated when the system (excluding the distribution mass of beam) is calculated in Figure 117A.B.C.D.Full marks: 311. figure 59 the most disadvantageous position of the beam to produce the maximum bending moment of the section K under movi

8、ng load is ()A.B.C.D.Full marks: 312. figure 49 the axial force of the truss a (as the tension is positive) is ()A.B.C.D.Full marks: 313., figure 33, ranging from three hinged rigid frame MBA is equal to ()A. 0.8Pa (left pull)B. 0.8Pa (right hand pull)C. 1.2Pa (left pull)D. 1.2Pa (right hand pull)Fu

9、ll marks: 314., one of the necessary conditions for the displacement by graph multiplication is ()The bending moment diagram under A. unit load is a straight lineThe B. structure can be divided into equal section straight bar sectionC. all member EI are constant and identicalD. results must be stati

10、cally determinateFull marks: 315. in Figure 101, the more convenient structure is solved by displacementA.B.C.D.Full marks: 316. in displacement method, the angular displacement at the hinged end and the line displacement at the supporting end are taken as the basic unknown quantitiesA. absolutely n

11、otB. under certain conditions canC. yes, but not necessaryD homework answer did not upload, first for everyone to review the use, if you need to answer the specific see my registration name to find. MustFull marks: 317. Fig. 57 the influence line of the support reaction force R in the beam is ()A.B.

12、C.D.Full marks: 318. figure 103 structural displacement law think mapping condition is ()A.B.C.D.Full marks: 319. Figure 60. The influence line of the support reaction force RC should be ()A.B.C.D.Full marks: 320. Figure 43 is the influence of the moment of the cross section of the cantilever beam.

13、The line shape is ()A.B.C.D.Full marks: 314 spring 13 autumn big orchid structural mechanics 13 spring online homework 1Total score: 100 test time: -Radio examinationJudgment questionJudgment questions (a total of 10 questions, a total of 40 points)1. the influence line of the cross section bending

14、moment of the simply supported beam is the same as that of the M diagram with the concentrated force P in the spanA. errorB. correctFull marks: 4The 2. force method, the basic unknown quantity = the redundant constraint number of the structure = the number of statically indeterminate times of the st

15、ructureA. errorB. correctFull marks: 43. the critical load position of statically determinate bending moment is usually the most unfavorable load positionA. errorB. correctHomework answer did not upload, first for everyone to review the use, if you need to answer the specific see my registration nam

16、e to find perfect score: 4 points4. rigid plates are objects that do not change the geometry and size of a system and can be considered as rigid bodies.A. errorB. correctFull marks: 45., Figure 18 system belongs to geometric invariant systemA. errorB. correctFull marks: 46. the graph of the internal

17、 force change of a given section under the moving load of a unit is called the influence line of internal forceA. errorB. correctFull marks: 47. in Figure 38, the two systems except the AB part have the same internal forcesA. errorB. correctFull marks: 48. deformation in the balance is a necessary a

18、nd sufficient condition for any virtual displacement, force, the reactive power is equal to the sum of each micro segment of the internal force in the virtual work and the deformation of the sum.A. errorB. correctFull marks: 49. the reasonable arch of any three hinged arch is a parabola of two timesA.