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2 • using ansys for finite eLement anaLysis
structure to harmonically time-varying loads. This tutorial was created
using ANSYS 7.0. The purpose of this tutorial is to explain the steps
required to perform harmonic analysis on the cantilever beam shown as
follows.
0.01 m
0.01 m
1.0 m
Modulus of elasticity (E) = 206800(10 6 ) N/m 2
Density = 7830 kg/m3
We will now conduct a harmonic forced response test by applying a
cyclic load (harmonic) at the end of the beam. The frequency of the load
will be varied from 1–100 Hz. The following figure depicts the beam
with the application of the load.
Cyclic load
Magnitude: 100 N
Frequency range: 1–100 Hz.
ANSYS provides three methods for conducting a harmonic analy-
sis. These three methods are the Full, Reduced, and Modal Superposition
methods. This example demonstrates the Full method because it is simple
and easy to use as compared to the other two methods. However, this
method makes use of the full stiffness and mass matrices and thus is the
slower and costlier option.
1.1.1 Step-by-Step ANSyS SolutioN
1.1.1.1 Preprocessing: Defining the Problem
Student should be able to make simple cantilever model himself or other-
wise use the following command list:
