Browsing UiS Brage by Author "Gaidai, Oleg"
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Bivariate statistics of floating offshore wind turbine dynamic response under operational conditions
Xu, Xiaosen; Wang, Fang; Gaidai, Oleg; Næss, Arvid; Xing, Yihan; Wang, Junlei (Peer reviewed; Journal article, 2022)FOWT (Floating offshore wind turbines) belong to the modern offshore wind energy industry generating green renewable energy. Accurate extreme loads and response prediction during power generation is an important design ... -
A case study of offshore wind turbine positioning optimization methodology using a novel multi-stage approach
Xu, Xiaosen; Du, Lin; Zhang, Zhongyu; Gu, Jiayang; Xing, Yihan; Gaidai, Oleg; Dou, Peng (Peer reviewed; Journal article, 2022)This investigation maximize the annual energy production (AEP) of a wind farm’s layout at a specific site using a novel multi-stage approach. The downstream wind turbines’ energy production decreases due to the reduced ... -
Characterisation of extreme load responses of a 10-MW floating semi-submersible type wind turbine
Xing, Yihan; Wang, Shuaishuai; Karuvathil, Anuraj; Balakrishna, Rajiv; Gaidai, Oleg (Peer reviewed; Journal article, 2023)The global average size of offshore wind turbines has increased steadily from 1.5 MW to 6 MW from 2000 to 2020. With this backdrop, the research community has recently looked at huge 10–15 MW class floating offshore wind ... -
A comparison study of power performance and extreme load effects of large 10-MW offshore wind turbines
Wang, Shuaishuai; Xing, Yihan; Karuvathil, Anuraj; Gaidai, Oleg (Peer reviewed; Journal article, 2023)The utilisation of offshore wind turbines has rapidly increased in the last decade, which has resulted in a steady increase in wind turbine sizes. The global average offshore wind turbine size has increased from 1.5 MW to ... -
Deconvolution approach for floating wind turbines
Liu, Zirui; Gaidai, Oleg; Sun, Jiayao; Xing, Yihan (Peer reviewed; Journal article, 2023-05)Green renewable energy is produced by floating offshore wind turbines (FOWT), a crucial component of the modern offshore wind energy industry. It is a safety concern to accurately evaluate excessive weights while the FOWT ... -
Dementia death rates prediction
Gaidai, Oleg; Yakimov, Vladimir; Balakrishna, Rajiv (Peer reviewed; Journal article, 2023)Background Prevalence of dementia illness, causing certain morbidity and mortality globally, places burden on global public health. This study primary goal was to assess future risks of dying from severe dementia, given ... -
Floating wind turbines structural details fatigue life assessment
Gaidai, Oleg; Yakimov, Vladimir; Wang, Fang; Zhang, Fuxi; Balakrishna, Rajiv (Peer reviewed; Journal article, 2023)Fatigue damage prediction is essential for safety of contemporary offshore energy industrial projects, like offshore wind turbines, that are to be designed for sufficiently long operational period of time, with minimal ... -
Future world cancer death rate prediction
Gaidai, Oleg; Yan, Ping; Xing, Yihan (Peer reviewed; Journal article, 2023-01)Cancer is a worldwide illness that causes significant morbidity and death and imposes an immense cost on global public health. Modelling such a phenomenon is complex because of the non-stationarity and complexity of cancer ... -
Gaidai-Xing reliability method validation for 10-MW floating wind turbines
Gaidai, Oleg; Xing, Yihan; Xu, Jingxiang; Balakrishna, Rajiv (Peer reviewed; Journal article, 2023)In contrast to well-known bivariate statistical approach, which is known to properly forecast extreme response levels for two-dimensional systems, the research validates innovative structural reliability method, which is ... -
Improving extreme anchor tension prediction of a 10-MW floating semi-submersible type wind turbine, using highly correlated surge motion record
Gaidai, Oleg; Xing, Yihan; Wang, Fang; Wang, Shuaishuai; Yan, Ping; Næss, Arvid (Peer reviewed; Journal article, 2022-07)Extreme value prediction of the load-effect responses of complex offshore structures such as the floating wind turbine (FWT) is crucial in ultimate limit state (ULS) design. This paper considers two cases to understand the ... -
Improving extreme offshore wind speed prediction by using deconvolution
Gaidai, Oleg; Xing, Yihan; Balakrishna, Rajiv; Xu, Jingxiang (Peer reviewed; Journal article, 2023)This study proposes an innovative method for predicting extreme values in offshore engineering. This includes and is not limited to environmental loads due to offshore wind and waves and related structural reliability ... -
Improving extreme response prediction of a subsea shuttle tanker hovering in ocean current using an alternative highly correlated response signal
Gaidai, Oleg; Xing, Yihan; Balakrishna, Rajiv (Journal article; Peer reviewed, 2022-09-02)A subsea shuttle tanker (SST) is a pioneering underwater submarine specifically designed to economically transport CO2 to smaller hydrocarbon fields. During loading and unloading of the CO2, the SST hovers over the well ... -
Novel deconvolution method for extreme FPSO vessel hawser tensions during offloading operations
Gaidai, Oleg; Xu, Xiaosen; Xing, Yihan (Peer reviewed; Journal article, 2022)Robust prediction of extreme hawser tensions during Floating Production Storage and Offloading (FPSO) operations is an important safety and reliability concern. Excessive hawser tension may occur during certain environmental ... -
A novel design approach for estimation of extreme load responses of a 10-MW floating semi-submersible type floating wind turbine
Balakrishna, Rajiv; Gaidai, Oleg; Wang, Fang; Xing, Yihan; Wang, Shuaishuai (Peer reviewed; Journal article, 2022)Offshore structures are constructed to withstand extreme wind and wave-induced loads, so studying these extreme loads is vital as it allows offshore structures, e.g., wind turbines, to be designed and operated with minimal ... -
A novel design approach for estimation of extreme responses of a subsea shuttle tanker hovering in ocean current considering aft thruster failure
Xing, Yihan; Gaidai, Oleg; Ma, Yucong; Næss, Arvid; Wang, Fang (Peer reviewed; Journal article, 2022)The subsea shuttle tanker (SST) is an innovative 33 600-ton underwater cargo tanker designed to transport CO2 to marginal fields. During offloading, the SST will approach and hover in the vicinity of the subsea well. A ... -
A novel method for prediction of extreme wind speeds across parts of Southern Norway
Gaidai, Oleg; Ping, Yan; Xing, Yihan (Peer reviewed; Journal article, 2022)The paper describes a novel structural reliability method, particularly suitable for multi-dimensional environmental systems, either measured or numerically simulated over a sufficient period, resulting in sufficiently ... -
Novel methods for coupled prediction of extreme wind speeds and wave heights
Gaidai, Oleg; Xing, Yihan; Xu, Xiaosen (Peer reviewed; Journal article, 2023)Two novel methods are being outlined that, when combined, can be used for spatiotemporal analysis of wind speeds and wave heights, thus contributing to global climate studies. First, the authors provide a unique reliability ... -
Novel methods for reliability study of multi-dimensional non-linear dynamic systems
Gaidai, Oleg; Xu, Jingxiang; Yan, Ping; Xing, Yihan; Wang, Kelin; Liu, Zirui (Peer reviewed; Journal article, 2023)This research presents two unique techniques for engineering system reliability analysis of multi-dimensional non-linear dynamic structures. First, the structural reliability technique works best for multi-dimensional ... -
A novel multi regional reliability method for Covid-19 death forecast
Gaidai, Oleg; Xing, Yihan (Peer reviewed; Journal article, 2022)Novel coronavirus disease is spread worldwide with considerable morbidity and mortality and presents an enormous burden on worldwide public health. The present study describes a novel bio-system reliability approach, ... -
A novel multi-dimensional reliability approach for floating wind turbines under power production conditions
Xu, Xiaosen; Xing, Yihan; Gaidai, Oleg; Wang, Kelin; Patel, Karan Sandipkumar; Dou, Peng; Zhang, Zhongyu (Peer reviewed; Journal article, 2022-08)Floating offshore wind turbines (FOWT) generate green renewable energy and are a vital part of the modern offshore wind energy industry. Robust predicting extreme offshore loads during FOWT operations is an important safety ...