Reliability Analysis Offshore Wind Turbine Support Structure Under Extreme Ocean Environmental Loads

Lee, Sang Geun; Kim, Dong Hyawn

doi:10.9765/kscoe.2014.26.1.33

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…이를 이용하면 기존 신뢰성해석 방법을 그대로 사용하면서도 해석시간 문제를 해결할 수 있고, 더불어 동적효과를 반영할 수 있다. Lee and Kim(2014) (Hasofer and Lind, 1974;Rackwitz and Fiessler, 1978). (Lee and Kim, 2014).…”

Section: 도입하였다 피크응답계수는 동일한 조건 하에 정/동적 구조해 석을 수행하여 얻은 정적응답 및 동적 피크응답의unclassified

Seismic Reliability Analysis of Offshore Wind Turbine Jacket Structure Using Stress Limit State

이¹,

김²

2016

Journal of Ocean Engineering and Technology

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Section: 도입하였다 피크응답계수는 동일한 조건 하에 정/동적 구조해 석을 수행하여 얻은 정적응답 및 동적 피크응답의unclassified

Seismic Reliability Analysis of Offshore Wind Turbine Jacket Structure Using Stress Limit State

이¹,

김²

2016

Journal of Ocean Engineering and Technology

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“…A reliability analysis must be performed using a specific failure condition or performance. Several performance conditions may be applied to offshore structures as fatigue performance [13][14][15][16][17], structural dynamic response [18], pushover collapse [19], and member stresses [20,21].…”

Section: Introductionmentioning

confidence: 99%

Determination of LRFD Environmental Load Factors of Offshore Platform in the North of Java Sea and Makassar Strait

2023

GEOMATE

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The environmental load factor in commonly used offshore platforms design code, API RP-2A (American Petroleum Institute -Recommended Practice 2A), is developed based on the environmental conditions of American waters, especially the Gulf of Mexico, which have relatively extreme environmental conditions when compared to Indonesian waters. Case studies were conducted to determine environmental load factors in Indonesian waters, particularly the North Java Sea and Makassar Strait, categorized as shallow seas. This analysis was carried out on the performance criteria of pushover failure. In this study, the base shear was analyzed to describe the strength of the structure in the form of a collapse base shear (CBS) and the load in the form of a wave base shear (WBS). CBS was obtained through pushover analysis with yield strength randomness. WBS was obtained through in-place analysis with wave height randomness. This concept was applied to the structure of the Monopod and Braced Monopod types of offshore platforms located in the North of Java Sea and Makassar Strait waters which had been optimized for the WSD and LRFD design methods. The reliability of the structure was analyzed based on the CBS and WBS values using the First Order Reliability Method (FORM) II. The reliability analysis results were in the form of a reliability index (β). North Java Sea gives a reliability index in the range from 3.58 to 4.38 for every design criteria. While Makassar Strait gives a reliability index in the range from 3.17 to 3.54 for every design criteria. With a high target safety level for the North Java Sea location, a 1.10 environmental load factor is recommended for further offshore structure design. But, for the Makassar Strait location, more studies need to be done to get better environmental load factor recommendations.

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“…However, the dynamic seismic analysis will take lots of time requiring repetitive structural analysis on the estimation of the response surface and the reliability analysis. By using the peak response factor which is defined as a ratio of dynamic response to static response, the time issue can be solved with dynamic effects (Lee and Kim, 2014).…”

Section: Introductionmentioning

confidence: 99%

Dynamic reliability analysis of offshore wind turbine support structure under earthquake

Kim¹,

Lee²,

Lee³

et al. 2015

Wind and Structures

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Seismic reliability analysis of jacket type support structure for offshore wind turbine was performed. When defining the limit state function by using dynamic response of support structure, a number of dynamic calculations should be done in such approach as First Order Reliability Method. That means analysis cost goes too much high. In this paper, a new reliability analysis approach using static response is used. Dynamic effect of the response is considered by introducing a new parameter called Peak Response Factor. The probability distribution of Peak Response Factor can be estimated by using peak value in dynamic response. The probability distribution of Peak Response Factor was obtained for a set of ground motions. Numerical example was presented to compare the proposed approach with conventional static response based approach.

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Reliability Analysis Offshore Wind Turbine Support Structure Under Extreme Ocean Environmental Loads

Cited by 4 publications

References 4 publications

Seismic Reliability Analysis of Offshore Wind Turbine Jacket Structure Using Stress Limit State

Seismic Reliability Analysis of Offshore Wind Turbine Jacket Structure Using Stress Limit State

Determination of LRFD Environmental Load Factors of Offshore Platform in the North of Java Sea and Makassar Strait

Dynamic reliability analysis of offshore wind turbine support structure under earthquake

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