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This test lets you check analysis free vibrations results for a compressor blade in the context of a modal (or frequency) case. You will use 2D meshes. |
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Reference:
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Length: |
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Radius: |
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Thickness: |
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Angle: |
Young Modulus (material): |
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Poisson's Ratio (material): |
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Density: ρ = 7857.2 Kg/m3 |
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Mesh Specifications: |
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Restraints: |
The table below presents the frequencies of the first six modes (mesh specifications: 11 x 11 nodes).
Mode |
Reference value |
Computed value [Hz] |
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Linear triangle |
Parabolic triangle |
Linear quadrangle |
Parabolic quadrangle |
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1 |
85.6 |
84.2461 |
82.8426 |
83.6888 |
85.7079 |
2 |
134.5 |
141.824 |
136.908 |
136.16 |
138.555 |
3 |
259.0 |
248.017 |
242.163 |
252.195 |
245.927 |
4 |
351.0 |
341.879 |
333.202 |
337.331 |
340.94 |
5 |
395.0 |
380.636 |
373.174 |
381.633 |
382.989 |
6 |
531.0 |
538.508 |
517.818 |
546.994 |
527.982 |
To Perform the Test:
The Free_vibrations_compressor_blade_QD8.CATAnalysis document presents a complete analysis of this case, computed with a mesh formed of parabolic and quadrangular elements (QD8).
To compute the case with linear quadrangle (QD4), linear triangle (TR3) and parabolic triangle (TR6) elements, proceed as follow:
Open the CATAnalysis document.
In the Advanced Meshing Tools workbench, replace the mesh specifications as indicated above.
In the Generative Structural Analysis workbench, compute the case.