Title :
Uncertainties in loads for ships structures
Author :
Atua, Khaled I. ; Ayyub, Bilal M.
Author_Institution :
Dept. of Civil Eng., Maryland Univ., College Park, MD, USA
Abstract :
Structural reliability analysis requires characterizing uncertainties in strength and loads for selected failure modes. The objective of this paper is to study the uncertainties associated with the vertical wave-induced bending moment on ship hull girders. Also, uncertainties in whipping effects are investigated. Spectral analysis was used to calculate the maximum life-time wave loads on a ship with and without whipping. This type of analysis requires knowing a set of basic random variables. The uncertainties in wave-induced and whipping bending moments were investigated using Monte Carlo simulation by randomly generating these basic random variables and calculating wave and whipping loads on a ship. A parameteric study was performed to investigate the effect of variability in these basic random variables on the uncertainties of wave loads
Keywords :
Monte Carlo methods; bending; failure (mechanical); ocean waves; reliability; ships; simulation; spectral analysis; structural engineering; uncertain systems; Monte Carlo simulation; failure modes; load uncertainties; maximum lifetime wave loads; parameteric study; random variables; ship hull girders; ship structures; spectral analysis; strength uncertainties; structural reliability analysis; variability; vertical wave-induced bending moment; whipping effects; Civil engineering; Density functional theory; Educational institutions; Frequency; Marine vehicles; Probability distribution; Random processes; Random variables; Spectral analysis; Uncertainty;
Conference_Titel :
Uncertainty Modeling and Analysis, 1995, and Annual Conference of the North American Fuzzy Information Processing Society. Proceedings of ISUMA - NAFIPS '95., Third International Symposium on
Conference_Location :
College Park, MD
Print_ISBN :
0-8186-7126-2
DOI :
10.1109/ISUMA.1995.527739
