Modal Analysis using Hammer and Shaker Excitation

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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 excitation 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.

The webinar will:

  • Introduce the idea of modal analysis
  • Give an overview of frequently used excitation signals
  • Describe how to perform measurements using impact hammer or shaker excitation
  • Explain how to use mode indicator functions
  • Give an overview of modal parameter identification techniques
  • Describe how to validate the obtained modal parameters
Webinar Details
Start time
14 May 2020 13:00
Registration deadline
13 May 2020
Duration
1 Hour
Type
Webinar
Price
Free

Instructor(s)
Niels Jørgen Jacobsen
Language
English