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International Journal of Reliability and Safety最新文献

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Complementary optimal age maintenance (COAM) policy for repairable systems 可修系统的互补最优寿命维持(COAM)策略
International Journal of Reliability and Safety Pub Date : 2020-03-11 DOI: 10.1504/ijrs.2020.10027560
N. Udoh, E. Effanga, C. E. Onwukwe
{"title":"Complementary optimal age maintenance (COAM) policy for repairable systems","authors":"N. Udoh, E. Effanga, C. E. Onwukwe","doi":"10.1504/ijrs.2020.10027560","DOIUrl":"https://doi.org/10.1504/ijrs.2020.10027560","url":null,"abstract":"A Complementary Optimal Age Maintenance (COAM) policy is proposed in this work for repairable systems which require high level of availability and safety standard by exploiting the comparative advantage of minimum expected cost-based optimal age replacement policy and maximum limiting availability-based optimal age replacement policy. The failure distribution, cost of preventive and failure maintenance and downtime of preventive and failure maintenance, which affect the age at which an operating system is replaced, were used to formulate the expected cost and limiting availability functions for repairable systems.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48002093","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
Optimal design of accelerated degradation test plan under modified ramp-stress loading 修正斜坡应力载荷下加速退化试验方案的优化设计
International Journal of Reliability and Safety Pub Date : 2020-03-11 DOI: 10.1504/ijrs.2020.10027566
P. Srivastava, Manisha
{"title":"Optimal design of accelerated degradation test plan under modified ramp-stress loading","authors":"P. Srivastava, Manisha","doi":"10.1504/ijrs.2020.10027566","DOIUrl":"https://doi.org/10.1504/ijrs.2020.10027566","url":null,"abstract":"This paper deals with the design of optimal modified ramp-stress Accelerated Degradation Test (ADT) using the assumption that the product's degradation path follows Wiener process. In an ADT, failure occurs when the performance characteristic crosses the critical value the first time. The model parameters are estimated using method of maximum likelihood. The optimum plan consists of finding the optimum number of specimens, optimum stress change point(s), and optimum stress rates by minimising asymptotic variance of estimate of q-th quantile life at use condition, subject to the constraint that total testing or experimental cost does not exceed a pre-specified budget. A numerical example is given to demonstrate the proposed model. Sensitivity analysis is carried out to examine the robustness of the proposed plan. A comparative study is performed to highlight the merit of the proposed plan.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"125 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41247903","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
A log-third order polynomial normal transformation approach for high-reliability estimation with scarce samples 稀疏样本高可靠性估计的对数三阶多项式正态变换方法
International Journal of Reliability and Safety Pub Date : 2020-03-11 DOI: 10.1504/ijrs.2020.10027561
Palaniappan Ramu, Harshal D. Kaushik
{"title":"A log-third order polynomial normal transformation approach for high-reliability estimation with scarce samples","authors":"Palaniappan Ramu, Harshal D. Kaushik","doi":"10.1504/ijrs.2020.10027561","DOIUrl":"https://doi.org/10.1504/ijrs.2020.10027561","url":null,"abstract":"Normal transformations are often used in reliability analysis. A Third order Polynomial Normal Transformation (TPNT) approach is used in this work. The underlying idea is to approximate the Cumulative Distribution Function (CDF) of the response in probit space using a third order polynomial while imposing monotonicity constraints. The current work proposes to apply log transformation to the ordinate of the transformed CDF and hence names the approach Log-TPNT. The log transformed data assists in improved fitting to the tails of the distribution resulting in better predictions of extreme values. Log-TPNT is demonstrated on a suite of statistical distributions covering all types of tails and analytical examples that cover aspects of high dimensions, non-linearity and system reliability. Results reveal that Log-TPNT can predict the response values corresponding to high reliability, with samples as scarce as 9. Finally, the variations associated with the response estimates are quantified using bootstrap.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43071769","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
Development and application of a novel hybrid occupational risk assessment model 一种新型混合职业风险评估模型的开发与应用
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10035801
Muhammet Gul
{"title":"Development and application of a novel hybrid occupational risk assessment model","authors":"Muhammet Gul","doi":"10.1504/IJRS.2020.10035801","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10035801","url":null,"abstract":"","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"507 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709549","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: 2
Local stress analysis of the lattice boom considering parametric uncertainty 考虑参数不确定性的格栅臂局部应力分析
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10037441
L. Xiaoling, Cheng Kai, Wang Ming-wei, Zhao Erfei
{"title":"Local stress analysis of the lattice boom considering parametric uncertainty","authors":"L. Xiaoling, Cheng Kai, Wang Ming-wei, Zhao Erfei","doi":"10.1504/IJRS.2020.10037441","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10037441","url":null,"abstract":"The lattice boom of the crane consists of slender tubes and its stability is of paramount importance. At present, most studies about stability of the lattice boom are based on certain parameters. Considering the uncertainty of the design parameters in actual design and production, the local stress of the lattice boom should be analysed with uncertainty. We propose a response surface method based on D-optimal design to simulate the relationship between each parameter and the local stress of the chord. Based on the obtained response surface function, Monte Carlo method is used to analyse the reliability of the lattice boom. The analysis results show that the uncertainty of the design parameters has a great influence on the local stress of the lattice boom. The initial imperfection factor has the greatest influence, and the interaction between the parameters is relatively small except the initial imperfection factor. The response surface method based on D-optimal design can simulate the complex model function relationship and simplify the complex model, which is highly efficient. So, it has broad application prospects in large-scale complex models.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709656","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
Availability analysis and inspection optimisation for a competing-risk k-out-of-n: G system 竞争风险k-out- n: G系统的可用性分析与检验优化
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10035804
H. Pant, S. B. Singh, Shivani Pant, Neelam Chantola
{"title":"Availability analysis and inspection optimisation for a competing-risk k-out-of-n: G system","authors":"H. Pant, S. B. Singh, Shivani Pant, Neelam Chantola","doi":"10.1504/IJRS.2020.10035804","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10035804","url":null,"abstract":"The availability and cost rate for a maintained k-out-of-n: G system encountering multiple failure modes undergoing periodic inspection are studied in this paper. Explicitly, a k-out-of-n: G system with a functional state and N failure modes is taken into account. Failure time of each failure mode is random. At each inspection and on failure detection, perfect repairs are carried out. Some theorems on the point availability, limiting availability and long-run average cost rate are obtained in the study. A condition for determining the optimal inspection period for minimum long-run average cost rate is also studied. An illustration is taken to explain the results obtained in the proposed work.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"479 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709614","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: 6
Reliability analysis of precast prestressed hollow core slabs 预制预应力空心芯板的可靠度分析
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10037443
B. Rekha, R. Ravindra
{"title":"Reliability analysis of precast prestressed hollow core slabs","authors":"B. Rekha, R. Ravindra","doi":"10.1504/IJRS.2020.10037443","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10037443","url":null,"abstract":"The precast concrete elements encompass uncertainty, due to randomness of the applied loads, concrete characteristics and dimensional inaccuracies. The proposed work focuses on reliability analysis of precast Prestressed Hollow Core (PHC) slabs in terms of statistical properties of the contributing parameters using Monte Carlo simulation. The random variables relating to geometrical dimensions of PHC slab such as effective depth (dp) and web-width (bw) for different grades of concrete (fc) are considered for analysis. The numerical models on ANSYS APDL release18.1 and Concise Beam ver.4.7 are validated with the experimental results with respect to failure load and deflection. The bending moments corresponding to failure loads under single Line Loading (LL) at mid span, Two Line Loading (TLL) and Uniformly Distributed Loading (UDL) cases were evaluated by modelling using Concise Beam software. The reliability analysis was implemented by developing a program in MATLAB R2015a software. It was observed that there is consistent level of reliability in the design methodology adopted in ACI-318.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709684","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
Reducing uncertainty and obtaining superior performance by segmentation based on algebraic inequalities 基于代数不等式的分割方法减少了不确定性，获得了较好的分割性能
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10035800
M. Todinov
{"title":"Reducing uncertainty and obtaining superior performance by segmentation based on algebraic inequalities","authors":"M. Todinov","doi":"10.1504/IJRS.2020.10035800","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10035800","url":null,"abstract":"The paper demonstrates for the first time uncertainty reduction and attaining superior performance through segmentation based on algebraic inequalities. Meaningful interpretation of algebraic inequalities has been used for generating new knowledge in unrelated application domains. Thus, the method of segmentation through an abstract inequality led to a new theorem related to electrical circuits. The power output from a source with particular voltage, on elements connected in series, is smaller than the total power output from the segmented sources applied to the individual elements. Segmentation attained through the same abstract inequality led to another new theorem related to electrical capacitors. The energy stored by a charge of given size on a single capacitor is smaller than the total energy stored in multiple capacitors with the same equivalent capacity, by segmenting the initial charge over the separate capacitors. Finally, inequalities based on sub-additive and super-additive functions have been introduced for reducing uncertainty and obtaining superior performance by a segmentation or aggregation of controlling factors. By a meaningful interpretation of sub-additive and super-additive inequalities, superior performance has been achieved for processes described by a power-law dependence.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709491","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: 3
A novel hybrid failure rate update model for imperfect maintenance 一种新的不完全维修混合故障率更新模型
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10035803
Jinhe Wang, Xiaohong Zhang, J. Zeng
{"title":"A novel hybrid failure rate update model for imperfect maintenance","authors":"Jinhe Wang, Xiaohong Zhang, J. Zeng","doi":"10.1504/IJRS.2020.10035803","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10035803","url":null,"abstract":"Imperfect maintenance models, based on general renewal processes, have been extensively researched. However, the virtual age used for measuring the effect of imperfect maintenance is an unintuitive variable in models in the literature, leading to discrepancies between evaluation results and real situations. To solve this problem, a failure rate update model that considers virtual age and failure intensity update factors is proposed. In this model, the virtual age factor is determined by intuitive variables, and the failure intensity update factor is determined on the basis of virtual age, reflected by the virtual age factor. A brief illustration of the validity and feasibility of the proposed model is presented, based on real maintenance data. The results obtained through numerical experiments, sensitivity analysis, and a case study demonstrates that the proposed model can accurately reflect system reliability level in a convenient manner.","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709602","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 of N-version programming software with testing effort 经过测试的n版本编程软件的可靠性
International Journal of Reliability and Safety Pub Date : 2020-01-01 DOI: 10.1504/IJRS.2020.10037442
Madhup Jain, Ritu Gupta
{"title":"Reliability of N-version programming software with testing effort","authors":"Madhup Jain, Ritu Gupta","doi":"10.1504/IJRS.2020.10037442","DOIUrl":"https://doi.org/10.1504/IJRS.2020.10037442","url":null,"abstract":"","PeriodicalId":39031,"journal":{"name":"International Journal of Reliability and Safety","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66709676","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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