Тест 3.12 Square diaphragm with pliable contour
Verification of the LIRA-FEM software / Тест 3.12 Square diaphragm with pliable contour / Source: Yeremeev P. G., Prisyazhnoi V. B. Experimental studies of square membranes with pliable contour. // Structural Mechanics and Design of Structures, pp. 58 - 61.
Source: Eremeyev P. G., Prisyazhnoi V. B. Experimental studies of square membranes with pliable contour. // Structural Mechanics and Design of Structures, pp. 58 - 61.
Geometry:
 |
а = 1.1 м; t = 0.5 м. |
Material characteristics: Е = 7 х 106 т/м2, v = 0.3, EF = 1280 т, EI = 0.075 тм2, GIk = 0.1 тм.
Boundary conditions: Vertical movements of the contour are forbidden.
Stresses: Uniformly distributed load over the area p = 0.6 т/м2.
The structure was modeled with membrane finite elements (FE 341-membrane), a 40 x 40 FE breakdown, and rod finite elements for strong bending (FE 309).
CALCULATION RESULTS:
|
Point |
The desired value |
Natural experiment |
Calculation results (LIRA) |
Uncertainty,% |
|
x = l/2 |
Deflection δ, mm |
38,8 |
38,85 |
0,13 |
|
|
Nmax, т (в контуре) |
-1,1 |
-1,1 |
0 |
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