DLX 02: slender frame – eigenmodes

Description

Material Modulus of elasticity E = 210 000 N/mm^2
Density \rho = 7800kg/m^3
Poisson’s ratio \nu = 0.3
Geometry Cross-sections b= 4.8mm
h=29mm
Boundary conditions Points A Fixed supports
For all bars R_z, M_x and M_y fixed
to impose 2D behaviour
Mesh No. of divisions 12

Results

Eigen mode Shape Independent reference Diamonds Difference
1 8,8Hz 8,8Hz 0,00%
2 29,5Hz 29,4Hz -0,34%
3 43,8Hz 43,8Hz 0,00%
4 56,3Hz 56,3Hz 0,00%
5 96,2Hz 96,2Hz 0,00%
6 102,6Hz 102,7Hz 0,10%
7 147,1Hz 147,1Hz 0,00%
8 174,8Hz 174,9Hz 0,06%
9 178,8Hz 178,9Hz 0,06%
10 206,0Hz 206,2Hz 0,10%
11 266,4Hz 266,7Hz 0,11%
12 320,0Hz 320,5Hz 0,16%
13 335,0Hz 335,5Hz 0,15%

References

  • Mécaniciens, S. F. D. (1990). Guide de validation des progiciels de calcul des structures: SDLSX 01: flexion d’une portique symétrique
  • Tested in Diamonds 2023r01.

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