کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
805275 1468214 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reliability analysis and optimisation of subsea compression system facing operational covariate stresses
ترجمه فارسی عنوان
تجزیه و تحلیل قابلیت اطمینان و بهینه سازی سیستم فشرده سازی زیر دریا در مواجهه با استرس های همگام عملیاتی
کلمات کلیدی
موسسه نفت آمریکا؛ بشکه در روز؛ موانع و تجزیه و تحلیل ریسک عملیاتی؛ مخارج سرمایه؛ تجزیه و تحلیل درخت خطا. اثرات حالات شکست و تجزیه و تحلیل حساسیت؛
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• Novel Weibull Corrosion-Covariate model for reliability analysis of subsea assets.
• Predict the accelerated degradation profile of a subsea gas compression.
• An enhanced optimisation method based on Fusell-Vesely decomposition process.
• New optimisation approach for smoothening of over- and under-designed components.
• Demonstrated a significant improvement in producing more realistic failure rate.

This paper proposes an enhanced Weibull-Corrosion Covariate model for reliability assessment of a system facing operational stresses. The newly developed model is applied to a Subsea Gas Compression System planned for offshore West Africa to predict its reliability index. System technical failure was modelled by developing a Weibull failure model incorporating a physically tested corrosion profile as stress in order to quantify the survival rate of the system under additional operational covariates including marine pH, temperature and pressure. Using Reliability Block Diagrams and enhanced Fusell-Vesely formulations, the whole system was systematically decomposed to sub-systems to analyse the criticality of each component and optimise them. Human reliability was addressed using an enhanced barrier weighting method. A rapid degradation curve is obtained on a subsea system relative to the base case subjected to a time-dependent corrosion stress factor. It reveals that subsea system components failed faster than their Mean time to failure specifications from Offshore Reliability Database as a result of cumulative marine stresses exertion. The case study demonstrated that the reliability of a subsea system can be systematically optimised by modelling the system under higher technical and organisational stresses, prioritising the critical sub-systems and making befitting provisions for redundancy and tolerances.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reliability Engineering & System Safety - Volume 156, December 2016, Pages 159–174
نویسندگان
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