scholarly journals Analysis and Synthesis of Resilient Load-Carrying Systems

Author(s):  
Fiona Schulte ◽  
Eckhard Kirchner ◽  
Hermann Kloberdanz

AbstractResilient systems have the capability to survive and recover from seriously affecting events. Resilience engineering already is established for socio-economic organisations and extended network-like structures e. g. supply systems like power grids. Transferring the known principles and concepts used in these disciplines enables engineering resilient load-carrying systems and subsystems, too. Unexpected load conditions or component damages are summarised as disruptions caused by nesciense that may cause damages to the system or even system breakdowns. Disruptions caused by nescience can be controlled by analysing the resilience characteristics and synthesising resilient load-carrying systems. This paper contributes to a development methodology for resilient load-carrying systems by presenting a resilience applications model to support engineers analysing system resilience characteristics and behaviour. Further a concept of a systematically structured solution catalogue is provided that can be used for the classification of measures to realise resilience functions depending on system adaptivity and disruption progress. The resilience characteristics are illustrated by 3 examples.

2018 ◽  
Vol 885 ◽  
pp. 77-87 ◽  
Author(s):  
Pia D. Schlemmer ◽  
Hermann Kloberdanz ◽  
Christopher M. Gehb ◽  
Eckhard Kirchner

Load-carrying systems often suffer from unexpected disruptions which can cause damages or system breakdowns if they were neglected during product development. In this context, unexpected disruptions summarize unpredictable load conditions, external disturbances or failures of system components and can be comprehended as uncertainties caused by nescience. While robust systems can cope with stochastic uncertainties, uncertainties caused by nescience can be controlled only by resilient load-carrying systems. This paper gives an overview of the characteristics of resilience as well as the time-dependent resilient behaviour of subsystems. Based on this, the adaptivity of subsystems is classified and can be distinguished between autonomous and externally induced adaption and the temporal horizon of adaption. The classification of adaptivity is explained using a simple example of a joint brake application.


2019 ◽  
Vol 23 (1) ◽  
pp. 48-61
Author(s):  
Valeriy P Ivanskiy ◽  
Sergey I Kovalev

The relevance of the article, which consists of two parts, is that the various theories of rationality presented only in philosophical works are considered. Meanwhile, it should be noted that in recent decades in scientific works on jurisprudence there is a clear trend of borrowing such terms from philosophy as «classical», «non-classical» or «post-non-classical» science in the description of a concept of law. Nevertheless, in legal studies there is still no concept of rationality, the criteria for its classification, allowing to describe the diversity of manifestations of legal reality. The purpose of the study is: 1) to find new non-classical foundations for the development of legal knowledge; 2) to substantiate the point of view that the category of "scientific rationality" and its typology used in philosophy, it is necessary to introduce into scientific use of legal science, which will push the boundaries of knowledge of legal reality; 3) to describe the features of understanding of the term "scientific rationality" in law in the context of its classification into the following two groups: classical and neoclassical (post-classical), as well as non-classical and post-classical. In the process of studying the philosophy of rationality in legal studies used a diverse set of methodological tools: 1) General philosophical methods (dialectical and idealistic); 2) General scientific methods - analysis and synthesis, deduction and induction, analogy, comparison; 3) and private (special) - logical, comparative-legal, formal-legal, normative-dogmatic; 4) method of interpretation, including the method of problem-theoretical reconstruction. The main results of achieving the goal of the study were proposals on: 1) introduction of the concept of "types and models of legal rationality" into the scientific circulation of jurisprudence; 2) classification of legal rationality into classical and non - classical types and corresponding models-neoclassical (post-classical) and post-non-classical. It should be noted that the post-classical and post-non-classical styles of legal thinking are evolved versions, respectively, of the classical and non-classical types of legal rationality. The basis for the classification of types of scientific rationality in legal science was the anthropological factor-consciousness homo juridicus and methodological tools with which legal consciousness is known. The novelty of the study is that the above classification of epistemological paradigms allows us to look at the law as a multilevel reality, which is simultaneously inherent in the two mechanisms of its Constitution - external and internal. Moreover, the presented criteria-based classification of legal rationality is the basis for the development of legal knowledge.


2021 ◽  
pp. 39-45
Author(s):  
A.V. Mil’kov ◽  
◽  
S. I. Mukhametova ◽  

Statement of the problem. The question of the classification of housing legal relations into regulatory and protective ones is not debatable. But not because there is a consensus on this issue in the doctrine, but because until now it has not become the subject of special research. In some works, one can find a brief mention of the division of housing legal relations into regulatory and protective, but it is difficult to find a detailed presentation of the author’s position on this issue. Against the background of the active development of the classification of civil legal relations into regulatory and protective inattention to this issue in the science of housing law looks like a serious omission over the past decades. Goals and objectives of the study. The article discusses the main provisions justifying the classification under consideration, examines the attitude towards it in the literature of a housing legal nature. Research methods: the article uses a logical method, and above all such techniques as analysis and synthesis, functional and comparative legal methods. Results, brief conclusions: ignoring the classification in question leads to contradictions in the doctrine of housing legal relations, to the ingraining of unreliable ideas about the ratio of the categories included in this doctrine. It seems important to carry out further research of housing legal relations on the basis of a consistent classification of housing legal relations into regulatory housing legal relations and protective housing legal relations.


Safety ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 51
Author(s):  
Karen Klockner ◽  
Peter Meredith

Researchers in the resilience engineering space have proposed the notion that organisations operating in complex socio-technical systems cannot ‘be’ resilient but can have the ‘potential for resilient performance’. This theoretical stance also suggests that organisations wanting to enhance their potential for resilience begin by measuring their operational safety performance against four key potentials, these being: the Potential to Anticipate; the Potential to Respond; the Potential to Learn; and the Potential to Monitor. Furthermore, to measure these four key resilience constructs, organisations have been recommended to use a Resilience Assessment Grid (RAG) developed as part of this theory. However, scarce research appears to have been conducted that bridges the theory and practice divide on just how organisations can pragmatically measure their current performance against these four resilience potentials using the RAG. Therefore, this research was interested in undertaking a pilot study using RAG theory in order to examine an organisation’s four resilience potentials, and was conducted within a large road transport organisation in Australia. Results indicated that measuring both the four individual potentials and a combination of the four potentials was possible using a RAG and proved effective in providing a snapshot of operational safety system resilience concepts. Recommendations on how to increase organisational resilience potentials were provided to ensure future safety endeavours would enhance the organisation’s potential to be resilience in the face of system variability and operational demands.


2018 ◽  
Vol 229 ◽  
pp. 01007
Author(s):  
Lies Wahyuni ◽  
Dede Rohmat ◽  
Iwan Setiawan

Universitas Pendidikan Indonesia is one of the leading university that should be responsive to environmental phenomena, especially about the earthquake disaster. Thus, developing disaster mitigation model is a very important thing to do. The purpose of this research is (1) identification of disaster risk factors, (2) classifying parameters and disaster risk indicator based on the availability of data, difficulty in obtaining data, and the accuracy of data, (3) develop alternative parameters to be used as a campus disaster mitigation model-based classification of disaster risk indicator. The method used in this research is literature study, analysis, and synthesis of theory and approach based on consideration of the expertise of the several specialist’s mitigations. The result of this study is an arrangement of the parameter for a campus with disaster mitigation hypothetical model insight which is divided into 3 parts, namely: ideal parameter consisting of 30 parameter indicators, medium parameter consisting of 27 parameter indicators, and simple parameter consisting of 22 parameter indicators.


2019 ◽  
Vol 9 (22) ◽  
pp. 4800 ◽  
Author(s):  
Leite ◽  
Albuquerque ◽  
Pinheiro

With the growing interest in technological solutions aimed at combating money laundering, several studies involving the application of technology have been carried out. However, there were no records of studies aimed at identifying, selecting, rigorously analyzing and synthesizing the literature on solutions that adopt technology to combat money laundering. This paper presents a systematic review of the literature on the application of technological solutions in the fight against money laundering. Seventy-one papers were selected from the 795 studies initially retrieved for data extraction, analysis and synthesis based on predefined inclusion and exclusion criteria. The results obtained with the data analysis made it possible to identify a general categorization of the domains of application of the approaches, as well as a mapping and classification of the support mechanisms adopted. The findings of this review showed that, among the application domain categories identified, the detection of suspicious transactions attracted greater attention from researchers. Regarding the support mechanisms adopted, the application of data mining techniques was used more extensively to detect money laundering. Topics for further research and refinement were also identified, such as the need for a better description of data analysis to provide more convincing evidence to support the benefits presented.


Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1732
Author(s):  
Thapelo C. Mosetlhe ◽  
Yskandar Hamam ◽  
Shengzhi Du ◽  
Eric Monacelli

Pressure control in water distribution networks (WDNs) provides an avenue for improving both their sustainability and reliability. The complexities of the networks make the problem more challenging as various situational operations must be accounted for to ensure that the entire system performs under recommended conditions. In general, this problem is addressed by the installation of pressure reducing valves (PRVs) in WDNs and determining their appropriate settings. Researchers have proposed the utilization of several control techniques. However, the limitations of both computational and financial resources have compelled the researchers to investigate the possibility of limiting the PRVs while ensuring their control is sufficient for the entire system. Several approaches have been put forward to mitigate this sub-problem of the pressure control problem. This paper presents a review of existing techniques to solve both the localization of PRVs and their control problems. It dwells briefly on the classification of these methods and subsequently highlights their merits and demerits. Despite the available literature, it can be noted that the solution methods are yet to be harmonized. As a result, various avenues of research areas are available. This paper further presents the possible research areas that could be exploited in this domain.


Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4786
Author(s):  
Yanpeng Hao ◽  
Zhaohong Yao ◽  
Junke Wang ◽  
Hao Li ◽  
Ruihai Li ◽  
...  

Icing forecasting for transmission lines is of great significance for anti-icing strategies in power grids, but existing prediction models have some disadvantages such as application limitations, weak generalization, and lack of global prediction ability. To overcome these shortcomings, this paper suggests a new conception about a segmental icing prediction model for transmission lines in which the classification of icing process plays a crucial role. In order to obtain the classification, a hierarchical K-means clustering method is utilized and 11 characteristic parameters are proposed. Based on this method, 97 icing processes derived from the Icing Monitoring System in China Southern Power Grid are clustered into six categories according to their curve shape and the abstracted icing evolution curves are drawn based on the clustering centroid. Results show that the processes of ice events are probably different and the icing process can be considered as a combination of several segments and nodes, which reinforce the suggested conception of the segmental icing prediction model. Based on monitoring data and clustering, the obtained types of icing evolution are more comprehensive and specific, and the work lays the foundation for the model construction and contributes to other fields.


2021 ◽  
Author(s):  
Sergey Gandzha ◽  
Dmitry Gandzha

An analysis of electric machines with axial magnetic flux is given. First, the effect of commutation on the electromagnetic moment and electromagnetic power is analyzed. Two types of discrete switching are considered. The analysis is performed for an arbitrary number of phases. The first type of switching involves disabling one phase for the duration of switching. The second type of switching involves the operation of all phases in the switching interval. The influence of the pole arc and the number of phases on the electromagnetic moment and electromagnetic power is investigated. The conclusion is made about the advantage of the second type of switching. It is recommended to increase the number of phases. Next, the classification of the main structures of the axial machine is carried out. Four main versions are defined. For each variant, the equation of the electromagnetic moment and electromagnetic power is derived. This takes into account the type of commutation. The efficiency of the selected structures is analyzed. The comparative analysis is tabulated for choosing the best option. The table is convenient for engineering practice. This chapter forms the basis for computer-aided design of this class of machines.


TEM Journal ◽  
2021 ◽  
pp. 892-899
Author(s):  
Elizabeta Hristovska ◽  
Sevde Stavreva

This article presents the stress and deformation shape of joint plate in two commonly used constructive designs of truss joints of a rotating excavator’s load-carrying structure. A local analysis of stresses and deformations of the joint plate have been conducted taking into consideration the most loaded truss joint of the working wheel’s load-carrying structure on specific rotating excavator, having a riveted design, as well as the theoretically determined forces affecting the joining trusses of the truss joint. These activities are performed employing FEM (Finite Element Method) modelling of the truss joint and using a software package for this purpose, in view of defined characteristic static and dynamic loads. Nowadays, the load-carrying structures are more often made by welding, so it is in our interest as it would affect the stress and deformation shape of the subject truss joint in welded design, bearing the same load conditions.


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