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-   -   [ANSYS Meshing] help me for modal analysis of steel structure (http://www.cfd-online.com/Forums/ansys-meshing/95066-help-me-modal-analysis-steel-structure.html)

Eng medo December 5, 2011 07:43

help me for modal analysis of steel structure
 
3 Attachment(s)
i want to make modal analysis of steel structure

Problem Description
Section properties:
Columns:
Box section 4 x 4 cm, thickness 2 mm
Beams:
Box section 4 x 2 cm, thickness 1.5 mm

Material properties:
Weight per unit volume γ = 7.849 t/m3
Poisson’s ratio σ = 0.3
Modulus of elasticity E = 2x107 t/m2

Weight of steel plates:
140 kg at each floor
Their mass is concentrated at columns

Notes:
• All column to beam connections are completely rigid
• Columns are fixed at base.

http://www.cfd-online.com/Forums/att...1&d=1323085197http://www.cfd-online.com/Forums/att...1&d=1323085301http://www.cfd-online.com/Forums/att...1&d=1323085301
i want to ask about

1- element type
2- meshing options
3- how to apply loads due to weight
4-how to get the damping with natural frequencies and mode shapes
5- 'All column to beam connections are completely rigid; what is the mean of this statement in the options of analysis


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