吉大14秋学期《结构力学》在线功课一(国外英文资料).doc

吉大14秋学期《结构力学》在线作业一(国外英文资料) Structural mechanics is an online assignment for the 14th autumn semester One, the judgment problem (altogether? 10? The question of the tao, total? 40? Cent. V 1.?? All the nodes in the first frame are just nodes. A. mistakes B. right ????????? Full marks: 4?? points 2.?? A binary is a device that connects a new node by two chains A. mistakes B. right ????????? Full marks: 4?? points 3.?? When any system is added or removed into a binary system, its motor properties remain unchanged. A. mistakes B. right ????????? Full marks: 4?? points 4.?? Without considering the deformation of the bar, the system that changes the geometry and position is called the geometric variable system. A. mistakes B. right ????????? Full marks: 4?? points 5.?? The geometric invariant system is a static structure. A. mistakes B. right ????????? Full marks: 4?? points 6.?? The schematic diagram is to remove some minor factors to simplify the schema to replace the actual structure. A. mistakes B. right ????????? Full marks: 4?? points 7.?? The difference between the necessary and redundant constraints is that the former can limit the degree of freedom of the system. A. mistakes B. right ????????? Full marks: 4?? points 8.?? All the nodes in the truss are hinge nodes. A. mistakes B. right ????????? Full marks: 4?? points 9.?? From the geometric analysis, the difference between static and static structures is that there are no redundant constraints. A. mistakes B. right ????????? Full marks: 4?? points 10.?? The arch structure is the structure of the shaft. A. mistakes B. right ????????? Full marks: 4?? points Two, one choice question (total? 10? The question of the tao, total? 40? Cent. V 1.?? The topic see pictures A. a. B. b. C. c. D. d. ????????? Full marks: 4?? points 2.?? The topic see pictures A. a. B. b. C. c. D. d. ????????? Full marks: 4?? points 3.?? The topic see pictures A. a. B. b. C. c. D. d. ????????? Full marks: 4?? points 4.?? The topic see pictures