Natural Frequencies of a Long Bar

Description

Calculate the first three natural frequencies of a long bar fixed at one end. The bar is 50" long and has a square cross section of side 0.9".

File Name

Browse to drive letter:\Users\Public\Public Documents\SOLIDWORKS\SOLIDWORKS version\samples\Simulation Examples\Verification\Frequency_13.SLDPRT and open the file.

Study Type

Frequency.

Mesh Type

Solid mesh.

Material Properties

Modulus of elasticity = 3 X 107 psi, Poisson's ratio = 0.3, Density = 0.2835 lb/in3.

Results

  f1 (Hz) f2 (Hz) f3 (Hz)
Theory 11.79 74.47 208.54
SOLIDWORKS Simulation 11.76 73.61 205.60

Reference

Flugge, W., “Handbook of Engineering Mechanics”, McGraw Hill Book Co. Ltd., 1962, pp61-6, 61-9.