modal-analysis-hammer-shaker

Modal Analysis Using Hammer or Shaker Excitation

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WEBINAR OVERVIEW:

In modal analysis a model of the dynamic properties of a structure is created. The model is described by a set of modal parameters from which the structural behavior can be predicted in different situations. Modal analysis is used in a wide variety of applications from securing structural integrity to improving comfort.

Modal measurements have traditionally been performed by exciting the structure with a measured force using either a hammer or one or more shakers, and measuring the responses using accelerometers. Frequency Response Functions between excitations and responses are calculated, and the modal parameters extracted. This is often referred to as Classical Modal Analysis to distinguish it from Operational Modal Analysis using non-measured ambient or self-generated excitation.

WHAT YOU WILL LEARN:

  • Brief overview of classical modal analysis
  • How to perform measurements using impact hammer or shaker excitation
  • An overview of frequently used excitation signals
  • How to use mode indicator functions
  • An overview of modal parameter identification techniques
  • Validation of the obtained modal parameters

This webinar is part of a series on Structural dynamics measurement and analysis.

Webinar Details
Start time
18 May 2021 11:00
Registration deadline
No deadline
Duration
75-minutes
Type
Virtual
Price
Free

Instructor(s)
Niels-Jørgen Jacobsen
Language
English