Uncertainty of estimated rainflow damage for random loads
(2009) In Marine Structures 22(2). p.261-274- Abstract
- One way to assess the uncertainty in fatigue damage analysis is to use a so-called safety index. In the computation of such an index the coefficient of variation for the accumulated damage is needed. Employing the rainflow cycle count method for fatigue damage leads to, in most cases, complicated calculations. Here we present a new and simplified method to estimate the coefficient of variation for the accumulated damage when only one sample path of the load is available. Non-stationary, slowly changing, Gaussian loads are given special attention. The approach is illustrated by means of stationary Gaussian loads with nine different spectra, a measured non-Gaussian load, a skewed load and the wave load accumulated during one year in a... (More)
- One way to assess the uncertainty in fatigue damage analysis is to use a so-called safety index. In the computation of such an index the coefficient of variation for the accumulated damage is needed. Employing the rainflow cycle count method for fatigue damage leads to, in most cases, complicated calculations. Here we present a new and simplified method to estimate the coefficient of variation for the accumulated damage when only one sample path of the load is available. Non-stationary, slowly changing, Gaussian loads are given special attention. The approach is illustrated by means of stationary Gaussian loads with nine different spectra, a measured non-Gaussian load, a skewed load and the wave load accumulated during one year in a "seasonally changing environment". (C) 2008 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1400202
- author
- Bengtsson, Anders ; Bogsjö, Klas LU and Rychlik, Igor
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Coefficient of variation, Rainflow damage, Damage variability
- in
- Marine Structures
- volume
- 22
- issue
- 2
- pages
- 261 - 274
- publisher
- Elsevier
- external identifiers
-
- wos:000265151000010
- scopus:61849162217
- ISSN
- 1873-4170
- DOI
- 10.1016/j.marstruc.2008.05.001
- language
- English
- LU publication?
- yes
- id
- 059c5d4d-021e-4538-8dfb-4f73e9bc15a3 (old id 1400202)
- date added to LUP
- 2016-04-01 12:27:17
- date last changed
- 2022-01-27 03:55:14
@article{059c5d4d-021e-4538-8dfb-4f73e9bc15a3,
abstract = {{One way to assess the uncertainty in fatigue damage analysis is to use a so-called safety index. In the computation of such an index the coefficient of variation for the accumulated damage is needed. Employing the rainflow cycle count method for fatigue damage leads to, in most cases, complicated calculations. Here we present a new and simplified method to estimate the coefficient of variation for the accumulated damage when only one sample path of the load is available. Non-stationary, slowly changing, Gaussian loads are given special attention. The approach is illustrated by means of stationary Gaussian loads with nine different spectra, a measured non-Gaussian load, a skewed load and the wave load accumulated during one year in a "seasonally changing environment". (C) 2008 Elsevier Ltd. All rights reserved.}},
author = {{Bengtsson, Anders and Bogsjö, Klas and Rychlik, Igor}},
issn = {{1873-4170}},
keywords = {{Coefficient of variation; Rainflow damage; Damage variability}},
language = {{eng}},
number = {{2}},
pages = {{261--274}},
publisher = {{Elsevier}},
series = {{Marine Structures}},
title = {{Uncertainty of estimated rainflow damage for random loads}},
url = {{http://dx.doi.org/10.1016/j.marstruc.2008.05.001}},
doi = {{10.1016/j.marstruc.2008.05.001}},
volume = {{22}},
year = {{2009}},
}