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Eksploatacja i Niezawodność – Maintenance and Reliability最新文献

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Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines. 重型柴油机缸套活塞撞击引起的空化建模与评价。
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-19 DOI: 10.17531/ein/169644
Dong Liu, Nannan Sun, G. Zhu, Hengchao Cao, Tie Wang, Guoxing Li, F. Gu
{"title":"Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines.","authors":"Dong Liu, Nannan Sun, G. Zhu, Hengchao Cao, Tie Wang, Guoxing Li, F. Gu","doi":"10.17531/ein/169644","DOIUrl":"https://doi.org/10.17531/ein/169644","url":null,"abstract":"Cavitation erosion of cylinder liner seriously affects the operational reliability and service life of heavy-duty diesel engines. The accuracy of the modeling-based cavitation risk evaluation is limited by the unclear correspondence between cylinder liner vibration and coolant cavitation. This report is intended to investigate the correspondence between cylinder liner vibration and coolant pressure by combining vibration cavitation test, pressure gradient calculation, and visualization observation. The cavitation risk of the cylinder liner under piston slap is also quantitatively analyzed based on the nonlinear structural dynamics model. The results show that the occurrence of cavitation will cause a nonlinear relationship between the cylinder liner acceleration and the coolant pressure. The difference in cavitation risk for each cylinder is related to the structural modal characteristics of the crankcase. In addition, the effect of piston-liner clearance and piston pin offset on the cavitation risk is investigated based on the dynamics model.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117189983","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
An adaptive method based on PC-Kriging for system reliability analysis of truss structures 基于PC-Kriging的桁架结构系统可靠性分析自适应方法
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-13 DOI: 10.17531/ein/169497
Pengyu Chen, C. Zhao, Hejun Yao, Shengnan Zhao
{"title":"An adaptive method based on PC-Kriging for system reliability analysis of truss structures","authors":"Pengyu Chen, C. Zhao, Hejun Yao, Shengnan Zhao","doi":"10.17531/ein/169497","DOIUrl":"https://doi.org/10.17531/ein/169497","url":null,"abstract":"In practice, a truss consists of a large number of members which makes it a complex system. This leads to difficulties to estimate the system reliability due to computational costs. An adaptive method is thereby proposed to deal with this issue. It constructs a global metamodel to quickly estimate the rough reliability index of a truss. According to the estimated reliability index, the differential evolution algorithm is performed to generate more samples located in an expanded domain so that more representative failure modes can be identified. Combined with AK-SYSi, local metamodels of representative failure mods are built, and updated through active learning. When the convergence criterion is satisfied, the results of system reliability analysis can be obtained. Eventually, two examples of truss structures are studied to illustrate the superiority of the proposed method in balancing accuracy and efficiency. The results indicate that the proposed method makes a good balance between accuracy and efficiency when it is applied to analyze the system reliability of the truss.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116248955","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
An effective hybrid method for analysis the large-scale reliability block diagram model 一种分析大型可靠性方框图模型的有效混合方法
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-12 DOI: 10.17531/ein/169408
Yashi Ping, Yi Ren, Zhifeng Li, Dezhen Yang, Chao Yang
{"title":"An effective hybrid method for analysis the large-scale reliability block diagram model","authors":"Yashi Ping, Yi Ren, Zhifeng Li, Dezhen Yang, Chao Yang","doi":"10.17531/ein/169408","DOIUrl":"https://doi.org/10.17531/ein/169408","url":null,"abstract":"The reliability block diagram (RBD) is a graphical tool used for reliability modeling and analysis in various industries, including shipbuilding, aviation, and aerospace. Typically, RBDs are transformed into Bayesian networks for quantitative analysis of systems. Bayesian networks are probabilistic graphical models that can capture the uncertainties and causal relationships in complex systems. They can provide various reliability metrics such as failure probability, mean time to failure, availability, etc. However, these techniques have several drawbacks, especially for large-scale models, such as being extremely time and memory-consuming. To address these issues, we propose a hybrid method for quantitative analysis of large-scale RBDs based on the structure identification approach and binary decision diagrams. Theoretical analysis and case verification demonstrate that the proposed method is significantly more efficient than the current one.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132906928","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
Cascading failures and maintenance optimization of urban transportation networks 城市交通网络级联故障与维修优化
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-06 DOI: 10.17531/ein/168826
Hongyan Dui, Yulu Zhang, Liwei Chen, Shaomin Wu
{"title":"Cascading failures and maintenance optimization of urban transportation networks","authors":"Hongyan Dui, Yulu Zhang, Liwei Chen, Shaomin Wu","doi":"10.17531/ein/168826","DOIUrl":"https://doi.org/10.17531/ein/168826","url":null,"abstract":"A convenient urban transportation network facilitates a high-quality life and a high-growth economy. Due to cascading failures being a ticklish question triggering continuous road congestion, the maintenance plan is momentous to restore the urban transportation network. Considering fault edges are removed and cars slowly drive out of these edges to ease traffic congestion, a traffic distribution model is proposed to analyze the cascading failures process. To resume the transportation network, this paper proposes a maintenance optimization with minimizing maintenance time. It recovers the cascading failures from two perspectives: the intra-area maintenance model and the inter-area maintenance model. At last, a transportation network of a city in China is regarded as a case study to illuminate the feasibility of the proposed models. The results show that on the premise of dividing traffic areas, it is reasonable to adopt the intra-area maintenance plan for cascading failures. Compared with the intra-area maintenance plan, the inter-area maintenance plan saves more time.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"43 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114136015","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
Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations 基于流-热-固耦合分析和蒙特卡罗验证仿真的透平多点损伤可靠性分析
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-05 DOI: 10.17531/ein/168771
W. Qian, X. Zeng, Shuang-hua Huang, X. Yin
{"title":"Reliability analysis of multi-site damage with failure dependency of the turbine based on flow-thermal-solid coupling analysis and the Monte Carlo validated simulations","authors":"W. Qian, X. Zeng, Shuang-hua Huang, X. Yin","doi":"10.17531/ein/168771","DOIUrl":"https://doi.org/10.17531/ein/168771","url":null,"abstract":"The harsh environmental loads may lead to strength failure in the turbine in an aero-engine. To accurately assess the strength reliability of the turbine under multiple loads, the stress distributions of 41 danger sites of a turbine under thermal, centrifugal, and pneumatic loads were determined by the flow-thermal-solid coupling analysis using ANSYS. Second, based on the flow-thermal-solid coupling analysis and response surface method, the probabilistic analysis model of stress at the danger site was established. And the probabilistic distribution of stress was determined by sampling and hypothesis testing. Finally, the reliability model of the turbine with multi-site damage and failure dependency was established, by which a reliability of 0.99802 was calculated. And the actual reliability of the turbine was 0.99626 determined by the Monte Carlo simulations, which verified the model in precision. The results indicated that the reliability model has a high efficiency and higher precision than the traditional reliability model with failure independence.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117115970","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
Optimization of Square-shaped Bolted Joints Based on Improved Particle Swarm Optimization Algorithm 基于改进粒子群算法的方形螺栓连接优化
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-05 DOI: 10.17531/ein/168487
Kui Chen, Cheng Yang, Yongsheng Zhao, Peng Niu, Nana Niu, Hongchao Wu
{"title":"Optimization of Square-shaped Bolted Joints Based on Improved Particle Swarm Optimization Algorithm","authors":"Kui Chen, Cheng Yang, Yongsheng Zhao, Peng Niu, Nana Niu, Hongchao Wu","doi":"10.17531/ein/168487","DOIUrl":"https://doi.org/10.17531/ein/168487","url":null,"abstract":"The bolted joint is widely used in heavy-duty CNC machine tools, which has huge influence on working precision and overall stiffness of CNC machine. The process parameters of group bolt assembly directly affect the stiffness of the connected parts. The dynamic model of bolted joints is established based on the fractal theory, and the overall stiffness of joint surface is calculated. In order to improve the total stiffness of bolted assembly, an improved particle swarm optimization algorithm with combination of time-varying weights and contraction factor is proposed. The input parameters are preloading of bolts, fractal dimension, roughness, and object thickness. The main goal is to maximize the global rigidity. The optimization results show that improved algorithm has better convergence, faster calculation speed, preferable results, and higher optimization performance than standard particle swarm optimization algorithm. Moreover, the global rigidity optimization is achieved.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115243053","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
Stability test of Hyperloop vehicle in different movement conditions 超级高铁车辆在不同运动条件下的稳定性试验
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-07-05 DOI: 10.17531/ein/169204
R. Kowalik, J. Kisilowski, T. Łusiak, Leszek Gil
{"title":"Stability test of Hyperloop vehicle in different movement conditions","authors":"R. Kowalik, J. Kisilowski, T. Łusiak, Leszek Gil","doi":"10.17531/ein/169204","DOIUrl":"https://doi.org/10.17531/ein/169204","url":null,"abstract":"A mathematical model is presented for the slide as a continuous system along which a moving force from the capsule moves, and the capsule as a discrete system. The displacements of the magnet elements were determined by performing simulations. Simulations were carried out with ANSYS software using FEM (Finite Element Method) calculations. The results will determine the nature of the capsule's movement. The results of the simulations were used to study stability in a technical and stochastic sense (Lyapunov criterion) for non-linear systems, taking into account the conditions present in the magnet and guide element system. Transverse displacements of the electromagnets were used in the technical stochastic stability study. The paper also presents a method for determining technical and stochastic stability for the Hyperloop vehicle for different speeds and taking into account the displacements of the levitation set. The probability of unsteady Hyperloop motion was then determined.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131026701","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
Influence of impact load form on dynamic response of chock-shield support 冲击载荷形式对挡块支架动力响应的影响
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-06-25 DOI: 10.17531/ein/168316
Z. Meng, Chen Ma, Yunyue Xie
{"title":"Influence of impact load form on dynamic response of chock-shield support","authors":"Z. Meng, Chen Ma, Yunyue Xie","doi":"10.17531/ein/168316","DOIUrl":"https://doi.org/10.17531/ein/168316","url":null,"abstract":"Chock-shield support is usually used in undergroud coal mining to protect the roof. However, as the mining depth gets deeper, impact load that came from the roof becomes stronger and more frequent. This causes the support to bear a large number of dynamic loads, and reducing its reliability. To improve the support performance of the chock-shield support, the mixed-kinetic model was established using the mechanical-hydraulic co-simulation method. The load distribution law of the support joint under impact load form different stability forces, impact load amplitude, and impact frequency is discussed. The mechanical-hydraulic cooperative response of the chock-shield support are obtained. The results show that different joints show typical non-uniformity characteristic during the loading process. The proposed mechanical-hydraulic co-simulation method can more accurately obtain the dangerous points of hydraulic support reliability. The results of this study will help to improve the reliability of the chock-shield support.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131884983","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: 1
Fault diagnosis of machines operating in variable conditions using artificial neural network not requiring training data from a faulty machine 使用人工神经网络对在可变条件下运行的机器进行故障诊断，而不需要来自故障机器的训练数据
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-06-15 DOI: 10.17531/ein/168109
P. Pawlik, Konrad Kania, Bartosz Przysucha
{"title":"Fault diagnosis of machines operating in variable conditions using artificial neural network not requiring training data from a faulty machine","authors":"P. Pawlik, Konrad Kania, Bartosz Przysucha","doi":"10.17531/ein/168109","DOIUrl":"https://doi.org/10.17531/ein/168109","url":null,"abstract":"The fault diagnosis for maintenance of machines operating in variable conditions requires special dedicated methods. Variable load or temperature conditions affect the vibration signal values. The article presents a new approach to diagnosing rotating machines using an artificial neural network, the training of which does not require data from the damaged machine. This is a new approach not previously found in the literature. Until now, neural networks have been used for machine diagnosis in the form of classifiers, where data from individual faults were required. A new diagnostic parameter rDPNS (Relative Differences Product of Network Statistics) as a function of the machine's shaft order was proposed as a kind of new order spectrum independent of the machine's operating conditions. The presented work analyses the use of the proposed method to diagnose misalignment and unbalance. The results of an experiment carried out in the laboratory demonstrated the effectiveness of the proposed method.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122713264","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: 1
A Novel Approach to the Screw Feeder Design to Improve the Reliability of Briquetting Process in the Roller Press 提高辊压机成型过程可靠性的螺旋给料机设计新方法
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2023-06-14 DOI: 10.17531/ein/167967
K. Baiul, S. Vashchenko, Olexander Khudyakov, M. Bembenek, A. Zinchenko, P. Krot, N. Solodka
{"title":"A Novel Approach to the Screw Feeder Design to Improve the Reliability of Briquetting Process in the Roller Press","authors":"K. Baiul, S. Vashchenko, Olexander Khudyakov, M. Bembenek, A. Zinchenko, P. Krot, N. Solodka","doi":"10.17531/ein/167967","DOIUrl":"https://doi.org/10.17531/ein/167967","url":null,"abstract":"The screw feeder design for the pre-compaction of bulk materials to be briquetted in a roll press is considered to increase the overall reliability. The relationship between the parameters of the screw feeder and its technological characteristics is investigated by the example of two fine-grained materials. A new mathematical model and design algorithm have been developed, which takes into account the properties of materials, the roller press parameters, the shape of the briquettes, and their deformation after compaction. The relationship between the pre-compaction pressure and the material stack height at the inlet is determined. The relations between the torque, the screw pitch, and the material stack height above the inlet, as well as the drive power and the screw pitch on productivity, are investigated. In experiments, using the proposed design, the compaction ratio of the peat increases by 22-27%, and hydrolyzed lignin – by 14-17%. The proposed approach allows for preventing drive overloading and ensures the reliable operation of pre-compaction devices for the roller presses.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132041498","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: 1
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