Onboard multivariate hazard assessment for UIKKU chemical tanker by Gaidai reliability method DOI Creative Commons
Oleg Gaidai, Alia Ashraf,

Jinlu Sheng

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 1(1)

Published: Oct. 7, 2024

The current study outlines a novel multimodal structural reliability methodology, suitable for naval dynamic systems, that are either numerically simulated, or directly physically measured. Cross-correlations between the system's principal/key dimensions/components, along with high dimensionality of complex not easily addressed by existing methods, mostly univariate bivariate. objective this had been to apply reliability/hazard assessment methodology UIKKU chemical tanker onboard measurements demonstrate efficiency proposed methodology. Current investigation utilized measured ice loadings, exerted on hull and propulsion devices during its Arctic voyage. Onboard data recordings then were interpreted gain knowledge about load levels. instrumented so ice-induced loads/stresses vessel shell plating monitored at various key locations, both in longitudinal as well vertical directions, vessel's hull. Longitudinal bending stresses several locations accelerations analyze global behaviour when colliding e.g., moderately heavy ridges. In addition onboard, Russian partners icebreaker Capitan Dranitsyn real-time measure strains/stresses within belt grillage, located bow. Icebreaker acted escort whole Obtained results may be harmonize IACS Polar ship rules. study, measuring system results, voyage have briefly represented.

Language: Английский

Applying the multivariate Gaidai reliability method in combination with an efficient deconvolution scheme to prediction of extreme ocean wave heights DOI
Oleg Gaidai, Yu Cao, Fang Wang

et al.

Marine Systems & Ocean Technology, Journal Year: 2024, Volume and Issue: 19(1-2), P. 165 - 178

Published: Aug. 9, 2024

Language: Английский

Citations

17
Panamax cargo-vessel excessive-roll dynamics based on novel deconvolution method DOI
Oleg Gaidai, Alia Ashraf, Yu Cao

et al.

Probabilistic Engineering Mechanics, Journal Year: 2024, Volume and Issue: 77, P. 103676 - 103676

Published: July 1, 2024

Language: Английский

Citations

16
Novel multivariate design concept for floating wind turbines by Gaidai multivariate reliability method and deconvolution scheme DOI Creative Commons
Oleg Gaidai, Zirui Liu, Yu Cao

et al.

Journal of low frequency noise, vibration and active control, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 22, 2024

Development of novel risk and reliability assessment methods is intended to support safer construction offshore structures, subjected environmental wave loads. Current study investigated 10-MW FWT (i.e., Floating Wind Turbine), operating under realistic conditions. While increasing safety, enhanced may eventually help reduce manufacturing maintenance costs. Excessive structural dynamics being usually caused by stressors, acting on system. Environmental loads resulting from ambient wind motions are typical for structures. work advocates a methodology that allows reliable forecasting failure/damage risks, arising excessive dynamics. Recently developed Gaidai multivariate along with state-of-the-art deconvolution method had been employed. Unlike existing approaches such as Weibull-type, GP Generalized Pareto), POT Peaks Over the Threshold), etc., recommended does not rely any pre-assumed functional class, when extrapolating failure probability tail. Practical advantages suggested combined scheme over, is, 4-parameter Weibull’s extrapolation demonstrated. Suggested makes effective use even limited underlying datasets, enabling robust accurate projections multidimensional system risks. Overall methodological performance suggests numerically stable extreme forecasts bending moments might be obtained, utilizing methodology. Deconvolution approach more than parametric techniques, due its non-parametric nature.

Language: Английский

Citations

16
Design prognostics for 4400 TEU container vessel by multi‐variate Gaidai reliability approach DOI Creative Commons

Yan Zhu,

Oleg Gaidai,

Jinlu Sheng

et al.

IET Intelligent Transport Systems, Journal Year: 2025, Volume and Issue: 19(1)

Published: Jan. 1, 2025

Abstract This case study introduces an innovative multivariate methodology for assessing the lifetime of marine engineering systems, specifically in cargo vessel transportation. The analysis focused on stress data collected onboard a 4400 TEU container during multiple trans‐Atlantic voyages. One major challenges transport lies mitigating risk loss due to excessive whipping loads. Accurate prediction extreme levels deck panels remains difficult, primarily because nonlinear and non‐stationary nature wave ship motion interactions. Higher‐order dynamic effects, such as second‐ third‐order responses, often become significant when ships operate under adverse environmental conditions, amplifying influences. Laboratory simulations, constrained by characteristics scale similarity issues, may not always provide reliable results. Consequently, from vessels navigating weather conditions serves critical resource comprehensive assessment. primary goal this was validate demonstrate effectiveness novel evaluation approach, leveraging measurements areal pressure core dataset. Gaidai proved be robust tool failure, hazard, damage risks complex, panel hull systems.

Language: Английский

Citations

5
State-of-the-art Gaidai hypersurface risk assessment for semi-submersible wind turbines, accounting for memory effects DOI Creative Commons
Oleg Gaidai, Fang Wang,

Jinlu Sheng

et al.

Energy Conversion and Management X, Journal Year: 2025, Volume and Issue: unknown, P. 100946 - 100946

Published: Feb. 1, 2025

Language: Английский

Citations

4
Lifetime assessment for container ship by multimodal Gaidai risk evaluation method DOI Creative Commons
Oleg Gaidai, Alia Ashraf, Yu Cao

et al.

Deleted Journal, Journal Year: 2025, Volume and Issue: 2(1)

Published: Jan. 6, 2025

This study presents a novel lifetime assessment technique that may be used in cargo vessel transportation marine engineering applications. onboard measured 4400 TEU container ship panel stress data was analyzed, the during numerous trans-Atlantic crossings. The risk of loss caused by excessive whipping loads is one key issues with transportation. It challenging to predict accuracy deck stresses due complex nonlinear and nonstationary properties wave motions. 2nd higher order motion effects are typically observed when sailing severe, stormy environment, influence nonlinearity grows noticeably. Depending on flow characteristics similarity ratios employed, laboratory testing also dispute. Because this, information acquired from ships operating extreme weather conditions offers unique insight into risks evaluation, as whole. highlights multidimensional reliability approach, based inherent qualities multivariate raw underlying dataset itself. main objective current had been benchmark Gaidai using areal pressure dynamic system dataset. evaluation methodology enabled efficient failure, hazard or damage for variety non-linear hull systems.

Language: Английский

Citations

3
Experimental Gaidai multi-modal risk assessment approach for wind energy harvesters DOI Creative Commons
Oleg Gaidai,

Jinlu Sheng,

Alia Ashraf

et al.

Applications in Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 100209 - 100209

Published: Feb. 1, 2025

Language: Английский

Citations

3
State-of-the-art multivariate lifetime assessment methodology for offshore renewable energy systems, utilizing novel deconvolution extrapolation scheme DOI
Oleg Gaidai, Fang Wang,

Jinlu Sheng

et al.

Proceedings of the Institution of Mechanical Engineers Part O Journal of Risk and Reliability, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Green, renewable energy attracts growing popularity as global attention shifts toward carbon-neutral technologies. One such viable alternative is offshore wind power, harvested by FOWTs (Floating Offshore Wind Turbines). In the contemporary business, play a key role, generating industrial volumes of clean electricity. Accurate operational life assessment FOWT structure critical design and technical safety concern, since excessive environmental loads may lead to structural damage. Utilizing OpenFAST (Fatigue, Aerodynamics, Structures Turbulence) aeroelastic simulator, nonlinear reactions could be modelled accurately. The current study introduces state-of-the-art reliability lifetime approach, intended serve designers when evaluating risks, given in-situ loading patterns. primary benefits recommended approach lie within its capacity address dynamic systems’ high-dimensionality, along with complex cross-correlations between system’s components. A novel deconvolution extrapolation scheme has been employed obtain conservative values. advantage above existing parametric methods, widely used in studies, non-parametric feature, that increases accuracy forecasts.

Language: Английский

Citations

3
Shuttle tanker operational reliability study by Gaidai multivariate risk assessment method, utilizing deconvolution scheme DOI Creative Commons
Oleg Gaidai, Hongchen Li, Yu Cao

et al.

Transportation Research Interdisciplinary Perspectives, Journal Year: 2024, Volume and Issue: 26, P. 101194 - 101194

Published: July 1, 2024

FPSO (Floating Production, Storage and Offloading) or FLNG Liquefied Natural Gas) vessels produce store crude oil liquified natural gas before being transported by ST (Shuttle Tanker). Robust prediction of excessive mooring hawser stresses crucial for structural design operational safety. Offloading activities may result in line tensions, impacting environmental Current study employed ANSYS-AQWA software to simulate dynamics, subjected wind-wave hydrodynamic loads, given realistic in-situ conditions. State-of-the-art multi-dimensional risk assessment methodology, presented this work based on direct MC (Monte Carlo) simulations, however, it is equally applicable measured data. Advocated methodology effectively utilizes underlying dataset, offering accurate failure/damage assessment. aims benchmark recently developed multivariate Gaidai approach, allowing the straightforward yet efficient failure damage risks nonlinear dynamic offshore/naval system as a whole. Primary benefit proposed lies its multi-dimensionality, can encompass virtually infinite number system's dimensions/components, each having distinct physical dimension. In contrast, traditional reliability methods are usually limited maximum two-dimensional systems. Novel deconvolution extrapolation scheme offers additional advantage, non-parametrical nature, opposed existing parametric techniques.

Language: Английский

Citations

15
ocean windspeeds forecast by Gaidai multivariate risk assessment method, utilizing deconvolution scheme DOI Creative Commons
Oleg Gaidai, Alia Ashraf, Yu Cao

et al.

Results in Engineering, Journal Year: 2024, Volume and Issue: 23, P. 102796 - 102796

Published: Aug. 28, 2024

Language: Английский

Citations

15