船舶结构载荷的不确定性

Proceedings of 3rd International Symposium on Uncertainty Modeling and Analysis and Annual Conference of the North American Fuzzy Information Processing Society Pub Date : 1995-03-17 DOI:10.1109/ISUMA.1995.527739

K. Atua, B. Ayyub

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引用次数: 0

摘要

结构可靠性分析要求对所选破坏模式的强度和载荷的不确定性进行表征。本文的目的是研究与船体梁上的垂直波浪弯矩有关的不确定性。此外，还研究了鞭挞效应的不确定性。采用谱分析方法计算了船舶在有和无鞭笞情况下的最大寿命波浪载荷。这种类型的分析需要知道一组基本的随机变量。采用蒙特卡罗模拟方法，通过随机生成这些基本随机变量，并计算船舶上的波浪和摆动载荷，研究了波浪和摆动弯矩的不确定性。对这些基本随机变量的变异性对波浪荷载不确定性的影响进行了参数化研究。

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Uncertainties in loads for ships structures

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.

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Proceedings of 3rd International Symposium on Uncertainty Modeling and Analysis and Annual Conference of the North American Fuzzy Information Processing Society

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