Xu, Jinsong (2000) Estimation of wave-induced ship hull bending moment from ship motion measurements. Doctoral (PhD) thesis, Memorial University of Newfoundland.
- Accepted Version
Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
A time-domain technique is developed for the real-time estimation of wave-induced vertical bending moment from the coupled heave and pitch motion measurements. The estimated values can be compared with those obtained from the strain gauge readings to ensure the validity of Hull Response Monitoring Systems (HRMS). -- A general time-domain relationship between the vertical bending moment and the coupled heave and pitch motions was formulated through a Fourier transform of the frequency-domain mathematical model. The instantaneous bending moment value was approximated by a function of the heaving and pitching displacements, velocities, and accelerations. A neural network technique was developed to identify this unknown function through a learning process. -- The application of the proposed technique to the experimental data demonstrated the validity of the methodology. The simulation results suggested that this technique could be used in conjunction with a time-domain simulation package to provide a numerical estimation model.
|Item Type:||Thesis (Doctoral (PhD))|
|Additional Information:||Bibliography: leaves 117-120.|
|Department(s):||Engineering and Applied Science, Faculty of|
|Library of Congress Subject Heading:||Hulls (Naval architecture); Wave resistance (Hydrodynamics)--Mathematical models; Bending moment--Mathematical models|
Actions (login required)