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Eksploatacja i Niezawodność – Maintenance and Reliability最新文献

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Numerical model of interaction of a mobile lift chain with a main gas pipeline pipe in the process of repair work 维修过程中移动式升降机链条与天然气管道主干管相互作用的数值模型
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-04-14 DOI: 10.17531/ein/187159
Maciej Dutkiewicz, Andriy Andrusyak, Andrii Kychma, V. Vytvytskyi, A. Velychkovych
{"title":"Numerical model of interaction of a mobile lift chain with a main gas pipeline pipe in the process of repair work","authors":"Maciej Dutkiewicz, Andriy Andrusyak, Andrii Kychma, V. Vytvytskyi, A. Velychkovych","doi":"10.17531/ein/187159","DOIUrl":"https://doi.org/10.17531/ein/187159","url":null,"abstract":"The paper proposes an original design of a mobile lifting device for diagnosing and repairing support nodes of above-ground segments of gas pipelines without stopping gas transportation. When using such a device, the rollers of the lifting chain interact with the surface of the pipe, which can possibly cause additional stresses in the gas pipeline. At the first stage of studying this problem, a model of a typical gas pipeline overhead crossing for the Carpathian region was built and the maximum operating force that should be developed by the mobile lift during repair operations was determined. At the second stage, a finite-element model of the interaction of the mobile lift chain with the main gas pipeline pipe was built. The additional equivalent stresses arising from the contact of the rollers of the lifting chain with the pipe surface were estimated. Recommendations are given to ensure the safe operation of the gas pipeline when using a mobile lift for local lifting of the pipe above the support of above-ground segments of gas pipelines.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140704885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strain-based running-reliability characterisation in time-domain for risk monitoring under various load conditions 基于应变的时域运行可靠性表征，用于各种负载条件下的风险监测
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-04-14 DOI: 10.17531/ein/186825
Salvinder Singh Karam Singh, L. Abdullah, Shahrum Abdullah, Abdul Hadi Azman, Ahmad Kamal Ariffin
{"title":"Strain-based running-reliability characterisation in time-domain for risk monitoring under various load conditions","authors":"Salvinder Singh Karam Singh, L. Abdullah, Shahrum Abdullah, Abdul Hadi Azman, Ahmad Kamal Ariffin","doi":"10.17531/ein/186825","DOIUrl":"https://doi.org/10.17531/ein/186825","url":null,"abstract":"This aim of this paper is to characterise the strain-based fatigue life data in time-domain using the newly modelled running-reliability technique that considers the load sequence effect. Current established conventional strain life models do not consider dependence for fatigue life of low or high amplitudes, on which with occur first in the load history. Finite element analysis is carried out to ensure the strain signals are captured at the most critical region during road test at various conditions. Fatigue life of 2.74 × 104 to 6.07 × 105 cycle/block with mean cycle to failure of 4.32 × 106 to 7.00 × 106 cycle/block is predicted based on the cycle sequence effect using cycle-counting method. The newly modelled running-reliability technique is formulated to extract the features of high amplitude excitation obtained from the strain signals for characterising the fatigue reliability features under load sequence effect. Hence, the reliability-hazard relationship for fatigue reliability characterisation of strain-based approach in time-domain using running-reliability technique.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"225 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140704572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bayesian inference for the inverse Weibull distribution based on symmetric and asymmetric balanced loss functions with application 基于对称和非对称平衡损失函数的反韦布勒分布贝叶斯推断及其应用
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-04-14 DOI: 10.17531/ein/187158
Mustafa M. Hasaballah, Yusra A. Tashkandy, Oluwafemi Samsin Balogun, M. E. Bakr
{"title":"Bayesian inference for the inverse Weibull distribution based on symmetric and asymmetric balanced loss functions with application","authors":"Mustafa M. Hasaballah, Yusra A. Tashkandy, Oluwafemi Samsin Balogun, M. E. Bakr","doi":"10.17531/ein/187158","DOIUrl":"https://doi.org/10.17531/ein/187158","url":null,"abstract":"In this study, the unified hybrid censored approach is employed to estimate the parameters of the inverse Weibull distribution, as well as the survival and hazard rate functions. Parameter estimates are obtained using both Bayesian and Maximum Likelihood approaches, with Bayesian estimates acquired through Lindley's approximation method using three distinct balanced loss functions. These encompass both symmetric and asymmetric balanced loss functions, specifically the balanced squared error (BSE) loss function, the balanced linear exponential (BLINEX) loss function, and the balanced general entropy (BGE) loss function. We conduct a simulation study to compare the effectiveness of various estimators, and a real-world data analysis is presented to illustrate practical implementation. Ultimately, our findings indicate that Bayesian parameter estimates consistently outperform their Maximum Likelihood counterparts across all methods.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"187 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140706563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bayesian calculation of optimal burn-in policy for heterogeneous items under two-dimensional warranty 用贝叶斯方法计算二维保证下异质物品的最佳烧毁策略
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-04-14 DOI: 10.17531/ein/186824
Yinzhao Wei, Xiaoliang Ling, Sanyang Liu
{"title":"Bayesian calculation of optimal burn-in policy for heterogeneous items under two-dimensional warranty","authors":"Yinzhao Wei, Xiaoliang Ling, Sanyang Liu","doi":"10.17531/ein/186824","DOIUrl":"https://doi.org/10.17531/ein/186824","url":null,"abstract":"Various burn-in procedures have been greatly used to screen weak items and reduce warranty costs. This paper proposes a new burn-in model for heterogeneous items with non-renewing two-dimensional warranty. All failures within burn-in and warranty are assumed to be repaired through the minimal repair. Then we screen the items according to the failure information of the items during burn-in. We establish a cost-based model to optimize the mean total cost of each item put into the market. We demonstrate that the optimal burn-in time or usage rate should reach its upper bound under some conditions. In practice, the reliability and mean total cost of an item may be random due to the uncertainty of parameters in the model. Therefore, we also propose a Bayesian method to calculate the mean total cost and optimal burn-in policy of an item, which fully considers the uncertainty of parameters in the model. An example is also given to demonstrate the proposed burn-in model and Bayesian method.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"26 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140705398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fusion model based RUL prediction method of lithium-ion battery under working conditions 基于融合模型的工作条件下锂离子电池 RUL 预测方法
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-04-05 DOI: 10.17531/ein/186537
Pengya Fang, Xiaoxiao Sui, Anhao Zhang, Di Wang, Liping Yin
{"title":"Fusion model based RUL prediction method of lithium-ion battery under working conditions","authors":"Pengya Fang, Xiaoxiao Sui, Anhao Zhang, Di Wang, Liping Yin","doi":"10.17531/ein/186537","DOIUrl":"https://doi.org/10.17531/ein/186537","url":null,"abstract":"Under working conditions, since the remaining useful life (RUL) prediction of lithium-ion battery is subject to uncertainties of random charging and discharging, and infeasibility of battery capacity test, a fusion model based RUL prediction method was proposed. First, the feature learning method of lithium-ion batteries was developed by synthesizing manual extraction and one-dimensional convolutional neural network (1DCNN) extraction. Then, a fused method was proposed to estimate the historical available capacity through exploring the spatial and temporal relationship of features, and the long short-term memory (LSTM) network model was adopted for predicting the RUL of lithium-ion battery. The proposed method was verified through the comparison of different methods, and the results show that it can realize highly precise and stable capacity estimation and RUL prediction under working conditions.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"217 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140740155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on Microwave-assisted TBM Double-edged Cutter Rock-breaking Efficiency and its Positional Relationship 微波辅助 TBM 双刃凿岩机破岩效率及其位置关系研究
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-04-05 DOI: 10.17531/ein/186447
Sen Wen, Lin Du, Qingmei Kong, Min Zhang, Xinru Ding
{"title":"Study on Microwave-assisted TBM Double-edged Cutter Rock-breaking Efficiency and its Positional Relationship","authors":"Sen Wen, Lin Du, Qingmei Kong, Min Zhang, Xinru Ding","doi":"10.17531/ein/186447","DOIUrl":"https://doi.org/10.17531/ein/186447","url":null,"abstract":"In this study, based on a microwave test, the discrete element program (PFC) is used to establish a microwave-assisted disc cutter rock-breaking model and explore the influence law of the positional relationship between microwave radiation and disc cutter penetration on rock-breaking efficiency, and the results show that: The improvement of the positional relationship has a significant effect on improving the rock-breaking efficiency, and the double-edged cutter reaches and minimum rock-breaking specific energy when breaking the rock in the center position with a waveguide spacing of 90 mm and in the inner and outer positions with a waveguide spacing of 150 mm; When the waveguide spacing is 150mm, the double-edged cutter with cutter spacing of 110mm, 130mm, and 190mm have their advantages in rock-breaking efficiency and economic benefits, which should be selected according to the actual needs of the project. The follow-up research should also fully consider the rock type, microwave parameters, cutter profile, engineering environment, and other factors for in-depth investigation.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"79 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140736355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental study and modelling of an air-cooled proton exchange membrane fuel cell stack in the static and dynamic performance 空气冷却质子交换膜燃料电池堆静态和动态性能的实验研究与建模
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-03-01 DOI: 10.17531/ein/184232
I. Pielecha, F. Szwajca
{"title":"Experimental study and modelling of an air-cooled proton exchange membrane fuel cell stack in the static and dynamic performance","authors":"I. Pielecha, F. Szwajca","doi":"10.17531/ein/184232","DOIUrl":"https://doi.org/10.17531/ein/184232","url":null,"abstract":"Research on Proton Exchange Membrane fuel cells is an important area in the field of modern energy sources. Such fuel cells are characterized by high efficiency and fast response times, making them a promising solution for sustainable energy production. Fuel cells operate under both static and dynamic conditions. Such varying operating conditions result in achieving different efficiency of fuel cell systems. This study attempts an experimental and modeled efficiency evaluation of a 1.2 kW open-cathode air-cooled fuel cell stack under static and dynamic conditions. A Sankey energy balance and an analysis of the balance components were determined for the fuel cell stack operating in these two operating states. Simultaneous modeling of the fuel cell under both static and dynamic conditions was carried out. The efficiency values of the fuel cell stack were found to be slightly higher under static conditions than under dynamic conditions. Modeling fuel cells in static and dynamic conditions results in slightly different parameters (better conformance was obtained for static models).","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"29 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140087658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Defect Categorization of Ribbon Blender Worm Gearbox Worm Wheel and Bearing Based on Artificial Neural Network 基于人工神经网络的带式搅拌机蜗杆齿轮箱蜗轮和轴承缺陷分类
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-03-01 DOI: 10.17531/ein/185371
R. Barshikar, Harshvardhan P. Ghongade, Anjali Bhadre, Harjitkumar U. Pawar, Harshal S. Rane
{"title":"Defect Categorization of Ribbon Blender Worm Gearbox Worm Wheel and Bearing Based on Artificial Neural Network","authors":"R. Barshikar, Harshvardhan P. Ghongade, Anjali Bhadre, Harjitkumar U. Pawar, Harshal S. Rane","doi":"10.17531/ein/185371","DOIUrl":"https://doi.org/10.17531/ein/185371","url":null,"abstract":"There is a demand for worm gearboxes in diversified industrial fields that include machinery such as escalators, ribbon blenders, pulverisers, bowl mills, etc. because of their peculiar characteristics like torque and quick retardation. The most commonly occurring defects in a worm gear box are scratches that develop in the worm gear and in bearings. Early defect categorization is required to prevent a sudden breakdown that would decrease production. The defect is depicted in different cases, which include defects in the gear tooth and the outer and inner races of the bearing. In another case, the defect is considered in the gear tooth as well as the bearing. The severity is designated using the ANN. The experiments were performed under these conditions with a good worm gearbox to capture vibration response signatures. Using these values as an input to the ANN, the model is trained. Experimental results show that vibration amplitude increases with fault progression in the worm gearbox, and the trained ANN model effectively categorizes worm gearbox faults with an accuracy of 97.12%.","PeriodicalId":508934,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"16 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140084018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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