Virtual Hull Monitoring – Continuous Fatigue Assessment Without Additional Instrumentation

PDF

Authors
  1. Thompson, I.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN);THE ROYAL INSTITUTION OF NAVAL ARCHITECTS, LONDON (UK)
Abstract
A novel technique to monitor hull stresses using data currently collected on most ships is explored. This technique, referred to herein as virtual hull monitoring, uses global position signals, measured or numerically-modelled wave data, and a database of calculated stress transfer functions. This enables monitoring of short-term stress states and corresponding fatique damage accumulation for many structural locations, either onboard at at a central location, for an entire fleet. The components, benefits, and limitations of this proposed technique are discussed. Wave buoy and strain gauge measurements from a full-scale naval vessel trial are used in comparisons with hindcast wave data and the calculated stress spectra for one structural location. Close agreement between the wave data sources and corresponding stress spectra warrants further examination of virtual hull monitoring.
Keywords
Hull monitoring;structural health monitoring;virtual hull monitoring;spectral fatigue analysis;STRUC_R
Report Number
DRDC-RDDC-2018-P099 — External Literature
Date of publication
01 Jul 2018
Number of Pages
5
Reprinted from
International Journal of Maritime Engineering, Vol 160, Part A3, July September 2018, pp. A-293 A-297
DSTKIM No
CA046878
CANDIS No
807289
Format(s):
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: