Skip to main content

2012 | OriginalPaper | Buchkapitel

29. A Comparison of Multiple Impact Testing Methods

verfasst von : Kevin L. Napolitano, Nathanael C. Yoder, Ralph D. Brillhart

Erschienen in: Topics in Modal Analysis I, Volume 5

Verlag: Springer New York

Aktivieren Sie unsere intelligente Suche um passende Fachinhalte oder Patente zu finden.

search-config
loading …

Abstract

Impact testing has proven to be a valuable tool for performing modal tests, especially when the frequency response functions from many single-input impact tests are combined together to help extract all observable modes from a structure. This type of testing is historically known as multiple reference impact testing (MRIT) when multiple response measurements are acquired for each test. In each of these single-input tests, the impact hammer is used to excite the structure once per frame of data and all response signals are allowed to decay to zero before the frame ends.
Impact testing may also involve situations where there is more than one impact per frame, whether the multiple impacts are due to a single impact hammer impacting the test article multiple times, multiple impact hammers impacting the structure once each per frame, or multiple impact hammers impacting the structure multiple times per frame. The potential reason for performing multiple impacts per frame of data is to introduce more energy into the test article. The potential reasons for using multiple impact hammers are, as with multiple shaker testing, to decrease testing time and to distribute energy throughout the structure.
This paper investigates and compares testing results from each of the testing methods described above, and then discusses the signal processing issues involved with each method. Single impact per acquisition frame methods provide the highest coherence levels at the peak frequencies. However, implementing different signal processing methods can significantly improve coherence at resonance in the case of the multiple impact per frame tests. Some clear benefits in frequency response function quality can be observed when comparing the various impact techniques.

Sie haben noch keine Lizenz? Dann Informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Literatur
1.
Zurück zum Zitat Fladung WA, Brown DL (1993) Multiple reference impact testing. Presented at 11th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida Fladung WA, Brown DL (1993) Multiple reference impact testing. Presented at 11th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida
2.
Zurück zum Zitat Phillips AW, Allemang RJ, Fladung WA (1998) The complex modal indicator function (CMIF) as a parameter estimation method. Presented at international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida Phillips AW, Allemang RJ, Fladung WA (1998) The complex modal indicator function (CMIF) as a parameter estimation method. Presented at international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida
3.
Zurück zum Zitat Napolitano K (2006) Using FRF interpolation to help separate closely spaced modes. Presented at 24th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida Napolitano K (2006) Using FRF interpolation to help separate closely spaced modes. Presented at 24th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida
4.
Zurück zum Zitat Hunt D, Brillhart R (1991) Modal testing using multiple input random excitation. Presented at 8th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida Hunt D, Brillhart R (1991) Modal testing using multiple input random excitation. Presented at 8th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida
5.
Zurück zum Zitat Napolitano K, Linehan D (2009) Multiple sine sweep excitation for ground vibration tests. Presented at 27th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida Napolitano K, Linehan D (2009) Multiple sine sweep excitation for ground vibration tests. Presented at 27th international modal analysis conference, Hyatt Orlando Hotel and Convention Center, Kissimmee, Florida
6.
Zurück zum Zitat Harris C, Piersol A (2002) Harris’ shock and vibration handbook, 5th edn. McGraw Hill, New York, p 30, Chap 21 Harris C, Piersol A (2002) Harris’ shock and vibration handbook, 5th edn. McGraw Hill, New York, p 30, Chap 21
7.
Zurück zum Zitat Daniell P (1946) Discussion of ‘On the theoretical specification and sampling properties of autocorrelated time-series.’ J R Stat Soc 8: 88–90 Daniell P (1946) Discussion of ‘On the theoretical specification and sampling properties of autocorrelated time-series.’ J R Stat Soc 8: 88–90
Metadaten
Titel
A Comparison of Multiple Impact Testing Methods
verfasst von
Kevin L. Napolitano
Nathanael C. Yoder
Ralph D. Brillhart
Copyright-Jahr
2012
Verlag
Springer New York
DOI
https://doi.org/10.1007/978-1-4614-2425-3_29

    Marktübersichten

    Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen.