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Review of Artificial Neural Networks for Wind Turbine Fatigue Prediction

Structural Durability & Health Monitoring 2024年第6期18卷 707-737页

作者： Husam AlShannaq Aly Mousaad Aly Windstorm impact Science and Engineering(WISE)Research LabLouisiana State UniversityBaton RougeLA 70803USA

Wind turbines have emerged as a prominent renewable energy source *** monitoring and detection methods are crucial to enhance their operational effectiveness,particularly in identifying fatigue-related *** review focuses on leveraging artificial neural networks(ANNs)for wind turbine monitoring and fatigue detection,aiming to provide a valuable reference for researchers in this domain and related *** various ANN techniques,including General Regression Neural Network(GRNN),Support Vector Machine(SVM),Cuckoo Search Neural Network(CSNN),Backpropagation Neural Network(BPNN),Particle Swarm Optimization Artificial Neural Network(PSO-ANN),Convolutional Neural Network(CNN),and nonlinear autoregressive networks with exogenous inputs(NARX),we investigate the impact of average wind speed on stress transfer function and fatigue damage in wind turbine *** findings indicate significant precision levels exhibited by GRNN and SVM,making them suitable for practical *** demonstrates superiority over BPNN and PSO-ANN in predicting blade fatigue life,showcasing enhanced accuracy,computational speed,precision,and convergence rate towards the global ***,CNN and NARX models display exceptional accuracy in classification *** results underscore the potential of ANNs in addressing challenges in wind turbine monitoring and fatigue ***,it’s important to acknowledge limitations such as data availability and model *** research should explore integrating real-time data and advanced optimization techniques to improve prediction accuracy and applicability in real-world *** summary,this review contributes to advancing the understanding of ANNs’efficacy in wind turbine monitoring and fatigue detection,offering insights and methodologies that can inform future research and practical applications in renewable energy systems.

关键词： Wind turbine fatigue prediction artificial neural network

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Dynamic Multi-Physics Behaviors and Performance Loss of Cylindrical Batteries Upon Low-Velocity impact Loading

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ENERGY & ENVIRONMENTAL MATERIALS 2024年第6期7卷 184-192页

作者： Huang, Qingdan Bai, Yang Luo, Han Jia, Yikai Zhang, Chao Northwestern Polytech Univ Sch Civil Aviat Xian 710072 Peoples R China Key lab impact Protect & Safety Assessment Civil A Taicang 215400 Peoples R China Northwestern Polytech Univ Sch Aeronaut Xian 710072 Peoples R China EVE Energy Co Ltd Huizhou 516006 Peoples R China

In challenging operational environments, Lithium-ion batteries (LIBs) inevitably experience mechanical stresses, including impacts and extrusion, which can lead to battery damage, failure, and even the occurrence of fire and explosion incidents. Consequently, it is imperative to investigate the safety performance of LIBs under mechanical loads. This study is grounded in a more realistic coupling scenario consisting of electrochemical cycling and low-velocity impact. We systematically and experimentally uncovered the mechanical, electrochemical, and thermal responses, damage behavior, and corresponding mechanisms under various conditions. Our study demonstrates that higher impact energy results in increased structural stiffness, maximum temperature, and maximum voltage drop. Furthermore, heightened impact energy significantly influences the electrical resistance parameters within the internal resistance. We also examined the effects of State of Charge (SOC) and C-rates. The methodology and experimental findings will offer insights for enhancing the safety design, conducting risk assessments, and enabling the cascading utilization of energy storage systems based on LIBs. In this study, the impact of low-velocity impacts on the performance and safety of LIBs is explored. Various conditions, such as impact energy, State of Charge (SOC), and C-rates, systematically reveal mechanical, electrochemical, and thermal responses, as well as damage behaviors. The study demonstrates that higher energy leads to increased structural stiffness, maximum temperature, and maximum voltage drop. Additionally, heightened impact energy and SOC significantly influence electrochemical parameters, including charging capacity and internal resistance. image

关键词： cycling performance damaged battery lithium-ion battery low-velocity impact mechanical safety LITHIUM-ION BATTERY SHORT-CIRCUIT MECHANICAL-BEHAVIOR POUCH CELLS COMPUTATIONAL MODEL ELECTRIC VEHICLES THERMAL-BEHAVIOR STRAIN-RATE DEFORMATION OVERCHARGE

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Biaxial tensile behavior of CoCrFeNi high-entropy alloy under dynamic and proportional loadings

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CHINESE JOURNAL OF AERONAUTICS 2024年第9期37卷 475-489页

作者： Li, Haoyang Gao, Liqiang Qi, Lin Feng, Yajing Wang, Jingyu Li, Yulong Yu, Qifeng Northwestern Polytech Univ Sch Aeronaut Xian 710072 Peoples R China Northwestern Polytech Univ Shaanxi Key Lab Impact Dynam & Engn Applicat Xian 710072 Peoples R China Northwestern Polytech Univ Sch Civil Aviat Suzhou 215699 Peoples R China NPU Yangzi River Delta Res Inst Suzhou 215400 Peoples R China

The dynamic failure behavior of CoCrFeNi High-Entropy Alloy (HEA) under plane biaxial stress was investigated in detail. The dynamic biaxial tensile tests were conducted using an Electromagnetic Biaxial Split Hopkinson Tensile Bar (EBSHTB) system. For comparison, the quasi-static uniaxial and biaxial tensile tests, as well as dynamic uniaxial tensile tests, were performed respectively. A cruciform specimen suitable for large plastic deformation was designed and employed in the experiments. The Finite Element Method (FEM) verified that the improved cruciform specimen could satisfy the basic requirements. The feasibility of the proposed specimen was further confirmed through loading tests. Finally, the quasi-static and dynamic yield loci of the HEA in the first quadrant of the principal stress space were plotted. The results indicate that the alloy exhibits obvious strain hardening effect and strain rate strengthening effect, the yield locus and plastic work contours can be accurately described by Hill'48 criterion. (c) 2024 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics. This is an open access article under the CC BY-NC-ND license .

关键词： High-entropy alloys Biaxial tensile test Cruciform specimen Electromagnetic split Hop- kinson bar Digital image correlation

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Comparative study of mechanical-electrical-thermal responses of pouch, cylindrical, and prismatic lithium-ion cells under mechanical abuse

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Science China(Technological Sciences) 2018年第10期61卷 1472-1482页

作者： LI Wei XIA Yong CHEN GuanHua SAHRAEI Elham State Key laboratory of Automotive Safety and Energy Department of Automotive Engineering Tsinghua University impact and crashworthiness lab Massachusetts Institute of Technology Electric Vehicle Safety lab The George Mason University

In the study, mechanical abuse tests mainly in the form of indentation were performed on the cylindrical cell, pouch cell, and prismatic cell. The mechanical force-displacement response, open circuit voltage(OCV), and temperature distribution were recorded and compared. In spherical head indentation tests of the pouch and prismatic cell and lateral indentation of the cylindrical cell, the peak force is strongly correlated with OCV drop and local temperature increase. However, in flat-end cylinder indentation tests, the internal mechanical damage is progressively developed, and the OCV drop and the temperature increase occur before the peak force. The fracture surfaces of the post-mortem samples were examined to investigate the correlation between fracture patterns and internal short circuit(ISC) behaviors(OCVand temperature distribution). Two distinct fracture patterns were observed that the in-plane fracture induced by biaxial stretching and inter-layers' fracture induced by shearing. A strong correlation is observed between the number of shear fractures and OCV drop. An increase in the number of inter-layers' fractures increases the rate of OCV drop. Additionally, the fracture patterns influence the ISC area and location,thereby affecting the heat generation and conduction as well as the temperature distribution.

关键词： mechanical abuse fracture pattern mechanical-electrical-thermal response lithium-ion battery

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Stress-state dependence of dynamic strain aging:Thermal hardening and blue brittleness

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International Journal of Minerals,Metallurgy and Materials 2021年第5期28卷 854-866页

作者： Wen-qi Liu Jun-he Lian Advanced Manufacturing and Materials Department of Mechanical EngineeringAalto UniversityPuumiehenkuja 302150 EspooFinland impact and crashworthiness lab Department of Mechanical EngineeringMassachusetts Institute of Technology77 Massachusetts AvenueCambridgeMA 02139-4307USA

This study aims to discover the stress-state dependence of the dynamic strain aging(DSA)effect on the deformation and fracture behavior of high-strength dual-phase(DP)steel at different deformation temperatures(25-400°C)and reveal the damage mechanisms under these various *** achieve different stress states,predesigned specimens with different geometric features were *** electron microscopy was applied to analyze the fracture modes(e.g.,dimple or shear mode)and underlying damage mechanism of the investigated *** is present in this DP steel,showing the Portevin-Le Chatelier(PLC)effect with serrated flow behavior,thermal hardening,and blue brittleness *** show that the stress state contributes distinctly to the DSA effect in terms of the magnitude of thermal hardening and the pattern of blue *** low stress triaxiality or Lode angle parameter promotes DSA-induced blue ***,the damage mechanisms also show dependence on the stress states in conjunction with the DSA effect.

关键词： dynamic strain aging effect Portevin-Le Chatelier effect damage mechanism dimple fracture shear fracture dual-phase steel

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Energy release characteristics of PTFE/Al/TiH2 reactive jet with different TiH2 content

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DEFENCE TECHNOLOGY 2024年第9期39卷 168-176页

作者： Jiang, Chunlan Zhang, Jingbo Hu, Rong Mao, Liang Li, Ming Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing 100081 Peoples R China

Titanium hydride (TiH2), a promising high-energy additive, is doped into PTFE/Al to optimize the energy output structure of the reactive jet and strive for better aftereffect damage ability to the target. Six types of PTFE/Al/TiH2 reactive liners with different TiH2 content are prepared by the molding and sintering method. The energy release characteristics of PTFE/Al/TiH2 reactive jet are tested by the transient explosion energy test, and are characterized from pressure and temperature. The reaction delay time, pressure history, and temperature history of the energy release process are obtained, then the actual value of released energy and reaction efficiency of the reactive jet are calculated. The results show that the peak pressure and temperature of the PTFE/Al/TiH2 jet initially increase and then decrease with increasing TiH2 content. When the TiH2 content is 10%, the actual value of released energy and reaction efficiency increased by 24% and 6.4%, respectively, compared to the PTFE/Al jet. The reaction duration of the reactive material is significantly prolonged as the TiH2 content increased from 0% to 30%. Finally, combined with the energy release behaviors of PAT material and the dynamic deformation process of liner, the enhancement mechanism of TiH2 on energy release of the reactive jet is expounded. (c) 2024 China Ordnance Society. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://***/ licenses/by-nc-nd/4.0/).

关键词： PTFE/Al/TiH2 Reactive materials Shaped charge impact energy release characteristics TITANIUM

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Structure–performance relationship of Au nanoclusters in electrocatalysis:Metal core and ligand structure

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Carbon Energy 2024年第8期6卷 63-89页

作者： Bowen Li Lianmei Kang Yongfeng Lun Jinli Yu Shuqin Song Yi Wang The Key lab of Low‐Carbon Chemistry&Energy Conservation of Guangdong Province PCFM LabSchool of Chemical Engineering and TechnologySchool of Materials Science and EngineeringSun Yat‐sen UniversityGuangzhouChina Department of Chemistry City University of Hong KongHong KongChina

Remarkable progress has characterized the field of electrocatalysis in recent decades,driven in part by an enhanced comprehension of catalyst structures and mechanisms at the *** precise metal nanoclusters,serving as exemplary models,significantly expand the range of accessible structures through diverse cores and ligands,creating an exceptional platform for the investigation of catalytic ***,ligand‐protected Au nanoclusters(NCs)with precisely defined core numbers offer a distinct advantage in elucidating the correlation between their specific structures and the reaction mechanisms in *** strategic modulation of the fine microstructures of Au NCs presents crucial opportunities for tailoring their electrocatalytic performance across various *** review delves into the profound structural effects of Au NC cores and ligands in electrocatalysis,elucidating their underlying mechanisms.A detailed exploration of the fundamentals of Au NCs,considering core and ligand structures,***,the interaction between the core and ligand structures of Au NCs and their impact on electrocatalytic performance in diverse reactions are *** the discourse,challenges and personal prospects are presented to guide the rational design of efficient electrocatalysts and advance electrocatalytic reactions.

关键词： Au nanoclusters core electrocatalytic performance ligand structures

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Establishing the link between D-mannose and juvenile grass carp ( Ctenopharyngodon idella): ): Improved growth and intestinal structure associated with endoplasmic reticulum stress, mitophagy, and apical junctional complexes

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ANIMAL NUTRITION 2024年第3期18卷 450-463页

作者： Zhang, Chong Feng, Lin Wu, Pei Liu, Yang Jin, Xiaowan Ren, Hongmei Li, Hua Wu, Fali Zhou, Xiaoqiu Jiang, Weidan Sichuan Agr Univ Anim Nutr Inst Chengdu 611130 Peoples R China Sichuan Agr Univ Univ Key Lab Sichuan Prov Fish Nutr & Safety Prod Chengdu 611130 Peoples R China Minist Agr & Rural Affairs Minist Educ Key Lab Anim Dis Resistance Nutr Key Lab Sichuan Prov Chengdu 611130 Peoples R China

D-mannose, essential for protein glycosylation, has been reported to have immunomodulatory effects and to maintain intestinal flora homeostasis. In addition to evaluating growth performance, we examined the impact of D-mannose on the structure of epithelial cells and apical junction complexes in the animal intestine. All 1800 grass carp (16.20 +/- 0.01 g) were randomly divided into six treatments with six replicates of 50 fish each and fed with six different levels of D-mannose (0.52, 1.75, 3.02, 4.28, 5.50 and 6.78 g/kg diet) for 70 d. The study revealed that D-mannose increased feed intake (P P 0.05). Dmannose supplementation at 1.75 g/kg increased crude protein content in fish and lipid production value (P P < 0.05). D-mannose supplementation at 4.28 g/kg increased intestinal length, intestinal weight and fold height of grass carp compared to the control group (P P < 0.05). This improvement may be attributed to the phosphomannose isomerase (PMI)-mediated enhancement of glycolysis. This study found that Dmannose supplementation at 4.28 or 3.02 g/kg reduced serum diamine oxidase activity or D-lactate content (P P < 0.05) and improved cellular and intercellular structures for the first time. The improvement of cellular redox homeostasis involves alleviating endoplasmic reticulum (ER) stress through the inositolrequiring enzyme 1 (IRE1), RNA-dependent protein kinase-like ER kinase (PERK), and activating transcription factor 6 (ATF6) signaling pathways. The alleviation of ER stress may be linked to the phosphomannomutase (PMM)-mediated enhancement of protein glycosylation. In addition, ubiquitindependent [PTEN-induced putative kinase 1 (PINK1)/Parkin] and ubiquitin-independent [BCL2interacting protein 3-like (BNIP3L), BCL2-interacting protein 3 (BNIP3), and FUN14 domain containing 1 (FUNDC1)] mitophagy may play a role in maintaining cellular redox homeostas

关键词： Grass carp ( Ctenopharyngodon idella ) D-mannose Intestine structure Endoplasmic reticulum stress Mitophagy Apical junctional complex NF-KAPPA-B ANTIOXIDANT STATUS OXIDATIVE STRESS PHYSICAL BARRIER TIGHT JUNCTIONS GRADED-LEVELS HOMEOSTASIS APOPTOSIS NRF2 MITOCHONDRIAL

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Experimental and theoretical analysis of loading characteristics of electret fi lter media for charged particles

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PARTICUOLOGY 2024年第10期93卷 87-98页

作者： Cai, Yiqi Cai, Rongrong Zhang, Lizhi South China Univ Technol Sch Chem & Chem Engn Key Lab Enhanced Heat Transfer & Energy Conservat Educ Minist Guangzhou 510640 Peoples R China South China Univ Technol State Key Lab Subtrop Bldg Sci Guangzhou 510640 Peoples R China

The degradation of filtration performance in electret filter media during usage poses a significant challenge. Pre-charging of aerosols has been identified as an effective method to mitigate this issue. However, the effects of particle charging characteristics on the loading characteristics of electret filters still need a comprehensive understanding. In this study, a needle-cylinder corona charger was employed to pre-charge aerosols, and the particle charge state was determined by multiphysics simulation. The effects of particle charge polarity and charge quantity on the loading performance of the electret filter were quantitatively investigated. The results showed that the particle charge polarity had a negligible impact on the loading performance under the condition of the equivalent particle charge quantity. In addition, the charged particles effectively improved the efficiency degradation during the loading process of electret media, with higher charge quantities resulting in more pronounced improvements. The electrostatic attenuation factor showed a negative exponential correlation with the particle charge quantity. This was attributed to the uneven particle deposition on fiber surface due to the attraction of charged particles by the opposite charges on the electret fibers, which alleviated the effect of electrostatic shielding. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.

关键词： Electret filter Charged particles Loading characteristic Corona charging Electrostatic screening NUMERICAL-SIMULATION FILTER FILTRATION AEROSOL PERFORMANCE COLLECTION TRANSPORT MODEL

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impact of metal polluted sewage water on soil nematode assemblages in agricultural settings of Aligarh,India

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Soil Ecology Letters 2024年第1期6卷 61-75页

作者： Mohammed F.S.A.Ghanem Shahid Afzal Humira Nesar Zarrin Imran Wasim Ahmad Nematode Biodiversity Research lab Department of ZoologyAligarh Muslim UniversityAligarh 202002India

Sewage water in agriculture threatens human health and soil ecosystems through metal *** show promise as bioindicators of soil health due to their abundance and position in soil food ***-polluted water decreased abundance of certain nematode groups and Sigma Maturity *** pollution positively affected nematode groups with r-selected life *** water has been inappropriately used in agriculture,posing possible threats to human health and the soil ecosystems by its constituent pollutants,especially heavy *** evaluation of its influences on soil biomes needs to consider the response of soil *** soil organisms,nematodes are seen as the best promising candidates for bioindicators of soil *** in,we collected soil samples from fresh water irrigated field from three sites(S1,S2 and S3)and sewage water irrigated distance gradient(5 m-40 m),to assess the influence of metal(Cu,Zn,Cd,Mn,Pb)polluted water on various characteristics of nematode *** results indicated that the heavy metals decreased the abundance of C-p3 nematodes,herbivores,and predatory nematodes as well as sigma maturity index,whereas,C-p1,C-p2,bacterivore and fungivore nematodes abundance and diversity positively responded to the metal ***,nematode genera with r-selected life cycle were positively affected and those with K-selected life cycle were negatively affected by metal *** nematode community has potential to be used as indicator of pollution stress in agricultural soils to check soil health and sustainability.

关键词： heavy metals sewage irigation agriculture nematodes bioindicators

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