Lifetime assessment for container ship by multimodal Gaidai risk evaluation method

Deleted Journal, Год журнала: 2025, Номер 2(1)

Опубликована: Янв. 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.

Язык: Английский

---

Experimental Gaidai multi-modal risk assessment approach for wind energy harvesters

Applications in Engineering Science, Год журнала: 2025, Номер unknown, С. 100209 - 100209

Опубликована: Фев. 1, 2025

Язык: Английский

---

State-of-the-art multivariate lifetime assessment methodology for offshore renewable energy systems, utilizing novel deconvolution extrapolation scheme

Proceedings of the Institution of Mechanical Engineers Part O Journal of Risk and Reliability, Год журнала: 2025, Номер unknown

Опубликована: Март 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.

Язык: Английский

---

Design prognostics for 4400 TEU container vessel by multi‐variate Gaidai reliability approach

IET Intelligent Transport Systems, Год журнала: 2025, Номер 19(1)

Опубликована: Янв. 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.

Язык: Английский

---

Multi-variate structural reliability assessment for wind energy harvester by Gaidai risk assessment method

Mechanics Based Design of Structures and Machines, Год журнала: 2025, Номер unknown, С. 1 - 14

Опубликована: Апрель 10, 2025

Язык: Английский

---

Future worldwide coronavirus disease 2019 epidemic predictions by Gaidai multivariate risk evaluation method

Analytical Science Advances, Год журнала: 2024, Номер 5(7-8)

Опубликована: Авг. 1, 2024

Accurate estimation of pandemic likelihood in every US state interest and at any time. Coronavirus disease 2019 (COVID-19) is an infectious illness with a high potential for global dissemination low rates fatality morbidity, placing some strains on national public health systems. This research intends to benchmark novel technique, that enables hazard assessment, based available clinical data, dynamically observed patient numbers while taking into account pertinent territorial temporal mapping. Multicentre, population-based, biostatistical strategies have been utilized process raw/unfiltered medical survey data. The expansion extreme value statistics from the univariate bivariate situation meets numerous challenges. First, types theorem cannot be directly extended (2D) case,-not mention challenges system dimensionality higher than 2D. Assessing outbreak risks future outbreaks nation/region interest. Existing bio-statistical approaches do not always benefits effectively handling large regional cross-correlation between various observations. These methods deal observations multi-regional phenomena. Apply contemporary, statistical/reliability techniques current study outlines bio-system assessment technique particularly suited environmental, bio, systems, over representative period. With use Gaidai multivariate approach, epidemic spatiotemporal may properly assessed. Based approach applied variety applications. study's primary finding was outbreaks, along matching confidence range. Future COVID-19/severe acute respiratory syndrome coronavirus 2 (SARS-COV2) examined study; however, COVID-19/SARS-COV2 infection transmission mechanisms discussed.

Язык: Английский

---

Multivariate risk assessment for offshore structures by Gaidai risk evaluation method under an accumulation of fatigue damage, utilizing novel deconvolution scheme

Structures, Год журнала: 2024, Номер 70, С. 107691 - 107691

Опубликована: Ноя. 1, 2024

Язык: Английский

---

Greenland Wind-Wave Bivariate Dynamics by Gaidai Natural Hazard Spatiotemporal Evaluation Approach

Atmosphere, Год журнала: 2024, Номер 15(11), С. 1357 - 1357

Опубликована: Ноя. 12, 2024

The current work presents a case study for the state-of-the-art multimodal risk assessment approach, which is especially appropriate environmental wind-wave dynamic systems that are either directly physically observed or numerically modeled. High dimensionality of system and cross-correlations between its primary dimensions components make it quite challenging existing reliability methods. goal this investigation has been application novel multivariate hazard methodology to combined windspeed correlated wave-height unfiltered/raw dataset, was recorded in 2024 by situ NOAA buoy located southeast offshore Greenland. Existing hazard/risk methods mostly limited univariate at most bivariate systems. It well known interaction windspeeds corresponding wave heights results multimodal, nonstationary, nonlinear with cross-correlated components. Alleged global warming may represent additional factor/covariate, affecting ocean related dynamics. Accurate necessary naval, marine, structures operate within particular offshore/ocean zones interest, susceptible nonstationary weather conditions. Benchmarking spatiotemporal efficiently extract relevant information from underlying field objective work. proposed evaluation presented assist designers engineers effectively assess structural risks ocean-driven wind-wave-related environmental/structural key result lies demonstration methodological superiority, compared popular copula approach.

Язык: Английский

---

Limit hypersurface state-of-the-art damage assessment approach for a galloping energy harvester, accounting for memory effects

Journal of Vibration and Control, Год журнала: 2024, Номер unknown

Опубликована: Сен. 13, 2024

Energy harvesters (i.e., EH) constituting nowadays an essential part of renewable energy engineering; hence, apart from numerical modeling, experimental studies are necessary, reliable input for durable design and structural safety assessments. In the current study, galloping EH’s performance was analyzed, utilizing extensive laboratory wind-tunnel tests, conducted under realistic windspeed conditions. The novel multivariate risks assessment methodology, presented in study is particularly feasible multi-dimensional nonlinear EH dynamic systems, that have been either directly Monte Carlo MC) numerically simulated or physically measured over a representative temporal lapse, providing piecewise ergodic time series. As shown this analysis, suggested methodology accurately enables accurate predictions system’s failure/hazard damage risks, based on laboratory-measured dynamics. Furthermore, inter-correlations between various systems’ critical components not always easily handled by classic risk techniques, when dealing with high-dimensional raw primary goal validation benchmarking which can extract pertinent information, contained within dynamics, lab-recorded histories. conclusion, hypersurface generic, additional capability to accurately, yet efficiently predict damage/failure variety multidimensional systems. Relatively narrow confidence bands reported forecasted failure levels, indicating both robustness setup, as well practical virtues advocated Gaidai methodology. Note being mathematically exact does rely pre-assumptions it general purpose.

Язык: Английский

---

Onboard multivariate hazard assessment for UIKKU chemical tanker by Gaidai reliability method

Deleted Journal, Год журнала: 2024, Номер 1(1)

Опубликована: Окт. 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.

Язык: Английский

---