Тест 4.7 Stability of the rod with rigid inserts
Verification of the LIRA-FEM software / Тест 4.7 Stability of the rod with rigid inserts / Numerical solution: Calculation with replacement of the rigid insert by a rod of high stiffness.
Numerical solution: Calculation with replacement of the rigid insert with a high stiffness rod.
Geometry:
 |
|
material characteristics: ЕA=2.7 х 105 т, EIy=EIz=2025 тм2, GI=4000 тм2,
ВС – hard insert.
Boundary conditions: Point A is pinched.
Нагрузки: Точка С:
Loading 1: Fx = 40 т,
Loading 2: Fy = -20 т,
Loading 3: Fz = 10 т.
CALCULATION RESULTS:
|
Loads |
The desired value |
Analytical solution |
Calculation results (LIRA) |
Uncertainty,% |
|
1 |
Load reserve coefficient |
3,676 |
3,677 |
0,03 |
|
2 |
6,53 |
6,34 |
0,15 | |
|
3 |
16,875 |
16,875 |
0 | |
|
1 |
Reserve coefficient taking into account bending-twisting forms |
2,92 |
2,92 |
0 |
|
2 |
5,54 |
5,54 |
0 | |
|
3 |
12,25 |
12,25 |
0 |
Preview image: Array
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