This test is used to validate the following attributes:
You will use a 1D mesh. 

Reference: 

SpecificationsGeometry Specifications

Young Modulus (material): 

Poisson's Ratio (material): 

Density: 

Mesh Specifications: 

Restraints (Userdefined): 
The results are based on the 9 lowest normal modes of the
structure.
The percentages of errors are listed in the table below:
Mode 
Exact [Hz] 
Beam [Hz] 
Error [%] 
1 and 2 (bending modes) 
42.568 
42.531 
0.09 
3 (torsional mode) 
71.5 
71.554 
0.08 
4 (longitudinal mode) 
125.51 
125.515 
0.00 
5 and 6 (bending modes) 
145.46 
145.064 
0.27 
7 (torsional mode) 
213.24 
221.756 
3.99 
8 and 9 (bending modes) 
267.01 
265.79 
0.46 
To Perform the Test:
The simplysupported_thick_beam.CATAnalysis document presents a complete analysis of this case, computed with a mesh formed of beam elements.
To compute the case, proceed as follow:
Open the CATAnalysis document.
Compute the case and generate an image called Deformed mesh.