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A simulation and experimental verification of the operation of the oxidising catalytic converter in diesel engine. 柴油发动机氧化催化转换器运行的模拟和实验验证。
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-18 DOI: 10.17531/ein/184090
Stanisław Kruczyński, Marcin Ślęzak
{"title":"A simulation and experimental verification of the operation of the oxidising catalytic converter in diesel engine.","authors":"Stanisław Kruczyński, Marcin Ślęzak","doi":"10.17531/ein/184090","DOIUrl":"https://doi.org/10.17531/ein/184090","url":null,"abstract":"This paper investigates an oxidizing catalytic converter in a diesel engine's particulate filter system, focusing on simulations and empirical studies. The converter, with a 1.4 dm3 volume and 400 cpsi channel density, features a platinum coating of 2.5 g/dm3. Scanning electron microscopy (SEM) examined its surface, revealing platinum and a highly porous structure with randomly distributed Pt crystallites. Simulations were conducted using AVL Boost, utilizing real exhaust gas concentrations to assess various converter volumes and channel densities for CO, HC, and NO2 conversion in NOX. These simulations were paralleled with empirical tests on an engine dynamometer. The comparison of simulation and experimental data showed that the simulation algorithm could accurately predict the converter's performance in reducing CO and HC levels and NO2 in NOX. This suggests that simulations can partly replace costly empirical research, offering a preliminary evaluation of the converter's future effectiveness.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"2 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139959388","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
Validation research of pressure decay test method for internal leakage detection of hydraulic cylinder 用于液压缸内部泄漏检测的压力衰减试验方法的验证研究
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-18 DOI: 10.17531/ein/184039
Weijie Li, Xinbo Qian, Xinyuan Chen, Feihong Li, Yan Lu
{"title":"Validation research of pressure decay test method for internal leakage detection of hydraulic cylinder","authors":"Weijie Li, Xinbo Qian, Xinyuan Chen, Feihong Li, Yan Lu","doi":"10.17531/ein/184039","DOIUrl":"https://doi.org/10.17531/ein/184039","url":null,"abstract":"Leakage test is one of the acceptance tests to ensure hydraulic cylinder reliability. Under the consideration of economic and technical maturity conditions, the existing internal leakage detection methods may be difficult to achieve rapid screening. After research, the pressure decay test method is a common method of quickly testing hydraulic cylinders for internal leakage in the manufacturing industry. However, the validity of the pressure decay test method has not been theoretically verified, limiting the versatility of the method. This paper will theoretically validate the effectiveness of the pressure decay test method and provide important theoretical support for its use as a general rapid screening method for internal leakage, thereby improving the reliability and safety of hydraulic systems. Both simulation and experimental results show that there is a linear relationship between the pressure decay rate and the internal leakage rate. Especially for working pressures greater than 16 MPa, the pressure factor has an insignificant impact on the application of this method.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"2 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139959187","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
Wasserstein Distance- EEMD Enhanced Multi-Head Graph Attention Network for Rolling Bearing Fault Diagnosis Under Different Working Conditions 不同工作条件下用于滚动轴承故障诊断的 Wasserstein Distance- EEMD 增强型多头图注意网络
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-15 DOI: 10.17531/ein/184037
Xingbing Wang, Yunfeng Yao, Chen Gao
{"title":"Wasserstein Distance- EEMD Enhanced Multi-Head Graph Attention Network for Rolling Bearing Fault Diagnosis Under Different Working Conditions","authors":"Xingbing Wang, Yunfeng Yao, Chen Gao","doi":"10.17531/ein/184037","DOIUrl":"https://doi.org/10.17531/ein/184037","url":null,"abstract":"Traditional fault diagnosis models often overlook the interconnections between segments of vibration data, resulting in the loss of critical feature information. Therefore, an efficient fault diagnosis model tailored for rolling bearings is proposed in this paper. The 1D vibration signals are first preprocessed using ensemble empirical mode decomposition (EEMD) to generate multiple intrinsic mode functions (IMF) as individual nodes. The percentage distance between each node is calculated using the Wasserstein distance (WD) to capture the relationships between nodes and use it as the edge weights to construct a node graph. An improved multi-head graph attention network (MGAT) model is established to extract features and perform classification on the node graph. This MGAT model effectively utilizes the relationships between nodes and enhances the accuracy of fault diagnosis. The experimental results demonstrate that the proposed method achieves higher accuracy compared to similar models while requiring less processing time.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"6 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963012","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
Surface roughness prediction and roughness reliability evaluation of CNC milling based on surface topography simulation 基于表面形貌模拟的数控铣削表面粗糙度预测和粗糙度可靠性评估
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/183558
Ziling Zhang, Xiaodong Lv, Baobao Qi, Yin Qi, Milu Zhang, Zhiqiang Tao
{"title":"Surface roughness prediction and roughness reliability evaluation of CNC milling based on surface topography simulation","authors":"Ziling Zhang, Xiaodong Lv, Baobao Qi, Yin Qi, Milu Zhang, Zhiqiang Tao","doi":"10.17531/ein/183558","DOIUrl":"https://doi.org/10.17531/ein/183558","url":null,"abstract":"Surface roughness is influenced by various factors with uncertainty characteristics, and roughness reliability can be used for the assessment of the surface quality of CNC milling. The paper develops a method for the assessment of surface quality by considering the coupling effect and uncertainty characteristic of various factors. According to the milling kinematics theory, the milling surface topography simulation was conducted by discretizing the cutting edge, machining time, and workpiece. Considering the coupling effect of various factors, a roughness prediction model is established by the SSA-LSSVM, and its prediction accuracy reaches more than 95%. Then, the roughness reliability model was developed by applying the response surface methodology to achieve the assessment of surface quality. The proposed method is verified by the milling experiments. The maximum values of the relative errors between the simulation and experimental results of the surface roughness and roughness reliability are 9% and 1.5% respectively, indicating the correctness of the method proposed in the paper.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"103 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785320","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
Surface roughness prediction and roughness reliability evaluation of CNC milling based on surface topography simulation 基于表面形貌模拟的数控铣削表面粗糙度预测和粗糙度可靠性评估
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/183558
Ziling Zhang, Xiaodong Lv, Baobao Qi, Yin Qi, Milu Zhang, Zhiqiang Tao
{"title":"Surface roughness prediction and roughness reliability evaluation of CNC milling based on surface topography simulation","authors":"Ziling Zhang, Xiaodong Lv, Baobao Qi, Yin Qi, Milu Zhang, Zhiqiang Tao","doi":"10.17531/ein/183558","DOIUrl":"https://doi.org/10.17531/ein/183558","url":null,"abstract":"Surface roughness is influenced by various factors with uncertainty characteristics, and roughness reliability can be used for the assessment of the surface quality of CNC milling. The paper develops a method for the assessment of surface quality by considering the coupling effect and uncertainty characteristic of various factors. According to the milling kinematics theory, the milling surface topography simulation was conducted by discretizing the cutting edge, machining time, and workpiece. Considering the coupling effect of various factors, a roughness prediction model is established by the SSA-LSSVM, and its prediction accuracy reaches more than 95%. Then, the roughness reliability model was developed by applying the response surface methodology to achieve the assessment of surface quality. The proposed method is verified by the milling experiments. The maximum values of the relative errors between the simulation and experimental results of the surface roughness and roughness reliability are 9% and 1.5% respectively, indicating the correctness of the method proposed in the paper.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"43 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139845423","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
Sandwich panel subjected to blast wave impact and accelerated fragments 夹芯板受到爆炸波冲击和加速碎片的影响
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/183698
R. Studziński, Wojciech Sumelka, M. Malendowski, T. Gajewski, H. Al-Rifaie, P. Sielicki
{"title":"Sandwich panel subjected to blast wave impact and accelerated fragments","authors":"R. Studziński, Wojciech Sumelka, M. Malendowski, T. Gajewski, H. Al-Rifaie, P. Sielicki","doi":"10.17531/ein/183698","DOIUrl":"https://doi.org/10.17531/ein/183698","url":null,"abstract":"The article presents sandwich panels subjected to blast wave impact and accelerated fragments. The research discusses results obtained from original experimental setups that fill a gap in the area of investigation of the mechanical response of sandwich panels used in civil engineering applications under accidental design situations such as blast wave impact and/or fragment penetration. In field experiments, a high-speed camera was used to record both the fragment trajectory and the deflection of the sandwich panel. The authors proposed the equivalent static load for both the global analysis of the sandwich panel and the calibration of the numerical model. In FE modelling, CONWEP algorithm was used to simulate blast wave impact, and ductile damage model material to allow perforation of the sandwich panel faces. The convergence of mesh size was analyzed. For the validated numerical model, an evaluation of the effect of the size of the fragment (diameter/mass) on the outlet velocity and the size of the inlet and outlet holes was carried out.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"114 35","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785150","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 subway sliding plug doors based on improved FMECA and Weibull distribution 基于改进的 FMECA 和 Weibull 分布的地铁塞拉门可靠性分析
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/178275
Weibo Wang, Wenxiu Liu, Yu Fang, Yongkang Zheng, Chuan Lin, Yonghua Jiang, Dong Liu
{"title":"Reliability analysis of subway sliding plug doors based on improved FMECA and Weibull distribution","authors":"Weibo Wang, Wenxiu Liu, Yu Fang, Yongkang Zheng, Chuan Lin, Yonghua Jiang, Dong Liu","doi":"10.17531/ein/178275","DOIUrl":"https://doi.org/10.17531/ein/178275","url":null,"abstract":"Using traditional FMECA to analyze the hazard of subway sliding plug door system, there are problems such as easy-to-take repetitive values, irrational allocation of expert's weights, and failure to consider the weights of evaluation factors. Hence, this paper proposes to improve FMECA by using linear interpolation to increase the differentiation of the same fault probability occurrence among various fault modes. Apply the DUOWA to dynamically assign weights to different experts. The AHP is used to endow weights to diverse evaluation factors to make them more suitable for engineering needs. The operation records of metro trains were collected from the Shanghai subway manufacturing plant for 1836 days. The hazards of the 17 common faults of the door were first analyzed using an improved FMECA,the EDCU is the component most prone to failure. Next, use a RCM strategy to determine maintenance periods for different faults. Finally, through the Weibull distribution fitting test, the fault rate function of the door is obtained, and the RUL of the door is predicted.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"35 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139845623","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
Testing and modeling the possibility of using a lamellar grinding wheel with an adaptive background structure 测试和模拟使用具有自适应背景结构的片状砂轮的可能性
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/183318
W. Zębala, Stanisław Młynarski, Ł. Ślusarczyk
{"title":"Testing and modeling the possibility of using a lamellar grinding wheel with an adaptive background structure","authors":"W. Zębala, Stanisław Młynarski, Ł. Ślusarczyk","doi":"10.17531/ein/183318","DOIUrl":"https://doi.org/10.17531/ein/183318","url":null,"abstract":"In the article, the authors present the concept of a mathematical model used to study the influence of the properties of the base materials used to produce an innovative abrasive wheel background on the operating characteristics of the final tool. This model will be used to verify various material and construction solutions. The article also covers the outcomes of research that confirm the developed model’s effectiveness in relation to the operation of lamellar grinding discs, as per their intended technological goal. The experiments involved surface grinding with grinding wheels constructed on chosen backgrounds. A dedicated research stand was designed to measure the temperature in the grinding zone without direct contact, using both new and used grinding discs. The tests incorporated various pressure levels applied by the grinding disc on the workpiece, as well as different working angles of the grinding disc.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785467","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 subway sliding plug doors based on improved FMECA and Weibull distribution 基于改进的 FMECA 和 Weibull 分布的地铁塞拉门可靠性分析
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/178275
Weibo Wang, Wenxiu Liu, Yu Fang, Yongkang Zheng, Chuan Lin, Yonghua Jiang, Dong Liu
{"title":"Reliability analysis of subway sliding plug doors based on improved FMECA and Weibull distribution","authors":"Weibo Wang, Wenxiu Liu, Yu Fang, Yongkang Zheng, Chuan Lin, Yonghua Jiang, Dong Liu","doi":"10.17531/ein/178275","DOIUrl":"https://doi.org/10.17531/ein/178275","url":null,"abstract":"Using traditional FMECA to analyze the hazard of subway sliding plug door system, there are problems such as easy-to-take repetitive values, irrational allocation of expert's weights, and failure to consider the weights of evaluation factors. Hence, this paper proposes to improve FMECA by using linear interpolation to increase the differentiation of the same fault probability occurrence among various fault modes. Apply the DUOWA to dynamically assign weights to different experts. The AHP is used to endow weights to diverse evaluation factors to make them more suitable for engineering needs. The operation records of metro trains were collected from the Shanghai subway manufacturing plant for 1836 days. The hazards of the 17 common faults of the door were first analyzed using an improved FMECA,the EDCU is the component most prone to failure. Next, use a RCM strategy to determine maintenance periods for different faults. Finally, through the Weibull distribution fitting test, the fault rate function of the door is obtained, and the RUL of the door is predicted.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"115 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785987","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
Testing and modeling the possibility of using a lamellar grinding wheel with an adaptive background structure 测试和模拟使用具有自适应背景结构的片状砂轮的可能性
Eksploatacja i Niezawodność – Maintenance and Reliability Pub Date : 2024-02-11 DOI: 10.17531/ein/183318
W. Zębala, Stanisław Młynarski, Ł. Ślusarczyk
{"title":"Testing and modeling the possibility of using a lamellar grinding wheel with an adaptive background structure","authors":"W. Zębala, Stanisław Młynarski, Ł. Ślusarczyk","doi":"10.17531/ein/183318","DOIUrl":"https://doi.org/10.17531/ein/183318","url":null,"abstract":"In the article, the authors present the concept of a mathematical model used to study the influence of the properties of the base materials used to produce an innovative abrasive wheel background on the operating characteristics of the final tool. This model will be used to verify various material and construction solutions. The article also covers the outcomes of research that confirm the developed model’s effectiveness in relation to the operation of lamellar grinding discs, as per their intended technological goal. The experiments involved surface grinding with grinding wheels constructed on chosen backgrounds. A dedicated research stand was designed to measure the temperature in the grinding zone without direct contact, using both new and used grinding discs. The tests incorporated various pressure levels applied by the grinding disc on the workpiece, as well as different working angles of the grinding disc.","PeriodicalId":335030,"journal":{"name":"Eksploatacja i Niezawodność – Maintenance and Reliability","volume":"44 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139845129","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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