Safety and Reliability – Safe Societies in a Changing World最新文献_第8页

Research on kinematic reliability of flapping mechanism for flapping wing flight 扑翼飞行中扑动机构运动可靠性研究

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-290

Z. Yang, J. Xuan

引用次数: 0

A flow-based method for identifying critical pipelines in complex natural gas supply systems 基于流量的复杂天然气供应系统关键管道识别方法

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-258

Su Huai, E. Zio, Jinjun Zhang, Liao Xueyi

引用次数: 2

A general framework for integrated risk assessment of nuclear/non-nuclear combined installations on market-oriented nuclear industry 以市场为导向的核工业核/非核联合装置综合风险评估的一般框架

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-204

K. Kowal, S. Potempski, P. Stano

引用次数: 3

An efficient computational strategy for robust maintenance scheduling: Application to corroded pipelines 一种有效的鲁棒维护调度计算策略:在腐蚀管道中的应用

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-276

E. Patelli, M. Angelis

{"title":"An efficient computational strategy for robust maintenance scheduling: Application to corroded pipelines","authors":"E. Patelli, M. Angelis","doi":"10.1201/9781351174664-276","DOIUrl":"https://doi.org/10.1201/9781351174664-276","url":null,"abstract":"The ability to predict correctly the future remaining life time of components is of paramount importance to improve the safety and reliability of systems and networks via an effective maintenance policy. However, simplifications and assumptions are usually adopted to compensate lack of data, imprecision and vagueness, which cannot be justified completely and may, thus lead to biased results. To overcome these issues, an imprecise probabilities approach is proposed for reliability analysis and risk-based maintenance strategy. A novel efficient computational approach is proposed for identifying robust maintenance strategies. The optimal solution is obtained through only one reliability assessment based on Advanced Line Sampling and reusing the outcome of maintenance activities in a force Monte Carlo approach. The proposed methodology remove the huge computational cost of reliability-base optimization making the analysis of industrial size problem feasible. The applicability of the approach is demonstrated by identifying the optimal maintenance policy of buried pipelines and it is shown how this approach can improve the current industrial practice.","PeriodicalId":278087,"journal":{"name":"Safety and Reliability – Safe Societies in a Changing World","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126126061","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

Problems of mobile risks in territory 区域内流动风险问题

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-223

J. Procházka, D. Procházková

引用次数: 5

Reliability aspects of a series load–sharing system 串联负荷分担系统的可靠性分析

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-296

Vasiliy V. Krivtsov, S. Amari, V. Gurevich

{"title":"Reliability aspects of a series load–sharing system","authors":"Vasiliy V. Krivtsov, S. Amari, V. Gurevich","doi":"10.1201/9781351174664-296","DOIUrl":"https://doi.org/10.1201/9781351174664-296","url":null,"abstract":"In reliability engineering, load–sharing is typically associated with a system in parallel configuration. Examples include bridge support structures, electric power supply systems, multiprocessor computing systems, etc. We consider a reliability maximization problem for a high–voltage commutation device, wherein the total voltage across the device is shared by the components in series configuration. Here, the increase of the number of load–sharing components increases component–level reliability (as the voltage load per component reduces) but may decrease system–level reliability (due to the increased number of components in series). We review optimal solutions for the proportional hazard and accelerated life models with the underlying exponential & Weibull distributions and elaborate on the log–linear, power, and Eyring laws used in the life–load models. voltage switching devices is to put single switching components in a series configuration. Shown in Figure 1 is a high voltage thyristor switch (Gurevich & Krivtsov 1991), wherein the total switching voltage is shared by the serially connected thyristors. In this case, the increase of the number of thyristors increases thyristor–level reliability (as the voltage load per thyristor reduces) but may decrease system–level reliability (due to the increased number of components in series). Clearly, the system reliability function in this case should have a maximum associated with an optimal number of thyristors in series. We derived (Krivtsov et al. 2017) optimal solutions to the two popular life–load models: the","PeriodicalId":278087,"journal":{"name":"Safety and Reliability – Safe Societies in a Changing World","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129861956","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

Two imperfect repair models for a gamma deteriorating system: A comparison 伽玛退化系统的两种不完善修复模型:比较

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-64

S. Haugen, A. Barros, C. Gulijk, T. Kongsvik, J. Vinnem

引用次数: 0

Safety climate and compliance in the Norwegian aquaculture industry—employees’ perceptions at different company levels 挪威水产养殖业的安全气候和合规性-不同公司级别员工的看法

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-20

T. Kongsvik, T. Thorvaldsen, I. Holmen, K. Størkersen

{"title":"Safety climate and compliance in the Norwegian aquaculture industry—employees’ perceptions at different company levels","authors":"T. Kongsvik, T. Thorvaldsen, I. Holmen, K. Størkersen","doi":"10.1201/9781351174664-20","DOIUrl":"https://doi.org/10.1201/9781351174664-20","url":null,"abstract":"The aquaculture industry is economically important in Norway, and the production is expected to increase in the future. Employees at the fish farms face a high risk of accidents compared to employees in other industries and the focus on safety from both industry and researchers has increased during the last decade. Adding to the knowledge on safety in aquaculture, the objective of this paper is to study employees’ perception of safety climate, and whether aspects related to safety climate may predict employees’ compliance. Findings from two surveys aimed at managers and employees in different companies are analysed. The first is a telephone survey targeting employees and managers at the fish farms. The second is a web-based survey involving the onshore management level. The results show that employees at all levels have a positive perception of the safety climate, but they also illustrate challenges related to work pressure, maintenance and employee participation. Furthermore, the analysis shows that work pressure affects compliance negatively while participation and competence have positive associations with compliance. These results give input to some practical measures for safety management in the industry. Holen et al., 2017a). The fish farm also has a feeding barge for equipment and feed storage, the feeding system, as well as manager offices, meeting rooms and accommodation for shift workers. Fish farmers are decreed to perform daily inspections to assess fish welfare and document that the net cages are in order. Fish farmers often use boats and cranes in their work, but increasingly rely on specialized service vessel crews to perform tasks such as mooring operations and delousing. The safety for fish, material assets and personnel is regulated by an extensive set of statutory requirements (Holmen et al., 2017b), which are audited by five different regulatory authorities (Holmen et al., 2017c). The aquaculture production has the potential to increase in the future (Olafsen et al., 2012). Technology innovations aim to enable production at areas more exposed with respect to climate, wind and currents. This raises new challenges when it comes to fish welfare and operational safety (Bjelland et al., 2015). The attention to occupational and operational safety in the aquaculture industry has increased during the last decade. Recent studies indicate that safety and risk management systems need to","PeriodicalId":278087,"journal":{"name":"Safety and Reliability – Safe Societies in a Changing World","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129574185","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: 7

Towards a systematic evaluation of supplementary protective measures and their quantification for use in functional safety 对辅助防护措施的系统评价及其在功能安全中的量化应用

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.1201/9781351174664-314

J. Zehetner, U. Weber, I. Häring, W. Riedel

引用次数: 2

Imprecise reliability analysis of complex interconnected networks 复杂互联网络的不精确可靠性分析

Safety and Reliability – Safe Societies in a Changing World Pub Date : 2018-06-15 DOI: 10.15488/9257

J. Behrensdorf, M. Broggi, M. Beer

{"title":"Imprecise reliability analysis of complex interconnected networks","authors":"J. Behrensdorf, M. Broggi, M. Beer","doi":"10.15488/9257","DOIUrl":"https://doi.org/10.15488/9257","url":null,"abstract":"The effect of natural and man made disasters on critical infrastructures are substantial, as evident from recent history. Break downs of critical systems such as electrical power grids, water supply networks, communication networks or transportation can have dire consequences on the availability of aid in such a crisis. That is why, reliability analyses of these networks are of paramount importance. Two important factors must taken into consideration during reliability analysis. First, the networks are subject to complex interdependencies and must not be treated as individual units. Second, the reliability analysis is typically based on some form of data and or expert knowledge. However, this information is rarely precise or even available. Therefore, it is important to account for different kinds of uncertainties, namely aleatory uncertainty and epistemic uncertainty. Aleatory uncertainty represents the natural randomness in a process, while epistemic uncertainty represents vaguness or lack of knowledge in the model. In this work we present an approach to the numerical reliability analysis of complex networks and systems extending a previously developed method based on Monte Carlo simulation and survival signature. The extended method treats both kinds of uncertainties, thus, yielding better results. We show how Monte Carlo simulation controls aleatory uncertainty and apply sets of distributions (probability boxes) to treat epistemic uncertainties in component failures. In this framework, dependencies are modelled using copulas. Copulas possess the unique property of decoupling the odelling of the univariate margins from the modelling of the dependence structure for continuous multivariate distributions. Analoguous to the p-boxes we use sets of copulas to include imprecision in the dependencies. Finally, the method is applied to an example system of coupled networks. A secondary task during the reliability analysis is the accurate modelling of component failures and dependencies. Typically, this is done based on data or expert assessments. However, both are subject to two kinds of imprecisions, namely, aleatory and epistemic uncertainty (Beer et al. 2013). Aleatory uncertainty represents the randomness inherent in a process, such as component degradation and external forces affecting the system (natural hazards, earthquakes, etc.), while epistemic uncertainty describes the uncertainty in the model due to a lack of or vagueness of knowledge about the system. The latter is usually regarded as reducible through acquiring of additional data and information. In this work we expand our previously developed technique by inclusion of imprecision. The method is based on Monte Carlo simulation and as such already deals with aleatory uncertainty. In this extension the modelling of component failures is refined by applying probability-boxes (p-boxes) to account for epistemic uncertainty. Feng et al. 2016 have shown the advantages of using p-boxes","PeriodicalId":278087,"journal":{"name":"Safety and Reliability – Safe Societies in a Changing World","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124975195","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