Modal Analysis using Hammer or Shaker Excitation

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 behaviour can be predicted in different situations. Modal analysis is used in a wide variety of applications from securing structural integrity to improving comfort. 

Modal analysis has 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. This is often referred to as Classical Modal Analysis to distinguish it from Operational Modal Analysis using non-measured ambient or self-generated excitation.

This webinar is the forth in a series of structural dynamics webinars. Previous webinar recordings available: Introduction to Structural Dynamics Measurements and Analysis, Operating Deflection Shapes Analysis, Operational Modal Analysis (OMA).

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