To Glossary

mode indicator function MIF

Standard

ECSS-E-ST-32-11C - Modal survey assessment (31 July 2008)

Definition

measure for phase purity of the measured mode shapes using a single reference

Notes

  • NOTE 1 The most common definitions applied by different modal analysis systems are: a. Breitbach (1972): b. Hunt (1984): where xj is the complex valued response at the jth structural point: ,
  • NOTE 2 MIF = 1 indicates a perfectly excited mode shape
  • NOTE 3 MIF << 1 indicates either no resonances in the frequency range or inappropriately excited modes.
  • NOTE 4 The mass weighting is often neglected.
  • NOTE 5 The MIF is a special case of the MMIF (see 3.2.35).

Relations

Glossary app image

ECSS Glossary mobile applications

ECSS Glossary mobile apps available from iOS and Android store and ECSS Glossary Plugin for MS Word available from Microsoft Appstore
Search the online Glossary

Glossary app icon
Download ECSS eGlossary App
Android | iOS
Glossary app icon
Microsoft Office Word Plugin
Download plugin