HUMAN SUBJECTIVE ASSESSMENT AND MULTI-FREQUENCY - MULTI- DIRECTIONAL VIBRATION MEASURED ONBOARD SHIPS

A form for subjective assessment of shipboard vibration data is presented together with the comparative analysis of the recorded vibration data for three ships, using six different types of processing (narrow band analysis with Hanning and flat top windows in average and hold max modes, 1/1 octave band analysis and 1/3 octave band analysis). Frequency components are weighed by the lower ISO 6954 curve. The single direction vibration spectrum, as well as the three directional spectra, is represented by a single number. The correlation analysis between the single number representation and the subjective assessment shows that the best correlation coefficient of 0.895 is obtained for the 1/1 octave band analysis and that the vibration velocity values below 1 mm/s are not significant. The subjective assessment is mainly related to the predominant direction of the total vibration content in a point.

  • Supplemental Notes:
    • Brodogradnja, v 44 n 1, Jan-March 1996, p 25 [9 p, 5 ref, 12 tab, 9 fig]
  • Authors:
    • Bobanac, N
  • Publication Date: 1996

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00727958
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM