Vibration-based damage detection in beam structures with multiple cracks: modal curvature vs. modal flexibility methods

ALTUNIŞIK A. C., OKUR F. Y., Karaca S., KAHYA V.

NONDESTRUCTIVE TESTING AND EVALUATION, cilt.34, sa.1, ss.33-53, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 1
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1080/10589759.2018.1518445
  • Dergi Adı: NONDESTRUCTIVE TESTING AND EVALUATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.33-53
  • Anahtar Kelimeler: Damage detection, modal curvature, modal flexibility, beam, multiple cracks, IDENTIFICATION, FREQUENCY
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

This study presents damage localisation in steel cantilever beams including multiple cracks based on changes in the modal curvature and flexibility. Natural frequencies and corresponding mode shapes of circular-hollow-sectional and box-sectional steel cantilever beams are obtained by analytical and experimental models under six damage scenarios. Based on these data, the modal curvature and modal flexibility methods are employed to localise the cracks within the beams. Comparisons are made to show effectiveness of the methods in determination of crack locations.