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H
The Fundamentals of
Modal Testing
Application Note 243-3
n i j /m
() =
r=1
( n - 2)2 + (2n ) 2
2
Preface
Modal analysis is defined as the
study of the dynamic characteris-
tics of a mechanical structure.
This application note emphasizes
experimental modal techniques,
specifically the method known
as frequency response function
testing. Other areas are treated
in a general sense to introduce
their elementary concepts and
relationships to one another.
Although modal techniques
are mathematical in nature, the
discussion is inclined toward
practical application. Theory is
presented as needed to enhance
the logical development of ideas.
The reader will gain a sound
physical understanding of modal
analysis and be able to carry
out an effective modal survey
with confidence.
Chapter 1 provides a brief
overview of structural dynamics
theory. Chapter 2 and 3 which
is the bulk of the note