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
Verification examples
- Section 1 Linear static problems for rod systems, plates and shells, three-dimensional problems
- Section 2 Physically nonlinear problems
- Section 3 Geometrically nonlinear problems for threads, cable-stayed trusses, rods, membranes and plates
- Section 4 Задачи устойчивости, в основном изгибно-крутильные формы потери устойчивости
- Section 5 Modal analysis
- Section 6 Linear dynamic problems
- Section 7 Static and dynamic problems with one-sided constraints
- Section 8 Geometric characteristics of the section
- Section 9 Procritical calculations
- Section 10 Problems of stationary and non-stationary heat conduction
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