Selecting the Correct Hammer and Hammer Tips for Frequency Response Function (FRF) Testing

Hammer model selection involves determining the size and mass of the hammer, which will provide the force amplitude and frequency content required for proper excitation of the structure under test.  Each hammer's corresponding frequency response plots indicate the frequency content of the force impulse that can be achieved using the variety of supplied tips. An extender mass, supplied with most hammers, allows further tuning by concentrating more energy at lower frequencies.

The hammer for the CMAC 5056, CMAC 5057 and CMAC 5058 kits has been selected as it offers the best options for general use.  Note: Details on how to select the correct tip can be found later in this application note.