图示变截面杆,设AB段和BC段的轴力分别为FNAB和FNBC ,则下列结论中正确的是________。[img=194x60]1802f50df8a2aa0.jpg[/img]
A: FNAB = 3kN,FNBC = –6kN
B: FNAB = 3kN,FNBC = –9kN
C: FNAB = 3kN,FNBC = 6kN
D: FNAB = 3kN,FNBC = 9kN
A: FNAB = 3kN,FNBC = –6kN
B: FNAB = 3kN,FNBC = –9kN
C: FNAB = 3kN,FNBC = 6kN
D: FNAB = 3kN,FNBC = 9kN
举一反三
- 图示变截面杆,设AB段和BC段的轴力分别为FNAB和FNBC ,则下列结论中正确的是________。[img=194x60]17de93ecacc6d44.jpg[/img] A: FNAB = 3kN,FNBC = –6kN B: FNAB = 3kN,FNBC = –9kN C: FNAB = 3kN,FNBC = 6kN D: FNAB = 3kN,FNBC = 9kN
- 图示受拉直杆,其中AB段与BC段内的轴力及应力关系为()。 A: FNAB=FNBCσAB=σBC B: FNAB=FNBCσAB>;σBC C: FNAB=FNBCσAB<;σBC D: FNAB<;FNBCσAB<;σBC
- 试比较如图所示杆件各段轴力的大小[img=359x100]1803be11ccb7373.png[/img] A: FNAB > FNBC > FNCD B: FNAB > FNCD >FNBC C: FNCD >FNBC > FNAB D: FNCD > FNAB > FNBC
- AB段轴力()KN。BC段轴力()KN。CD段轴力()KN。DE段轴力()KN。2fe3ecd03a02fe1ecc7d7f86645c5087
- 某船电磁计程仪指示的航速为12kn,计程仪改正率ΔL=0%,当时流速为3kn,试问顶流时该船对水速度是多少? A: 15 kn B: 12 kn C: 9 kn D: 3 kn