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Tytuł:
Design and mechanical analysis of a composite T-type connection structure for marine structures
Autorzy:
Li, Xiaowen
Zhu, Zhaoyi
Li, Yan
Hu, Zhe
Powiązania:
https://bibliotekanauki.pl/articles/260625.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
T-type connection structure
composite structure design
test
mechanical analysis
marine structure
Opis:
A new T-type connection structure consisting of composite sandwich plates, reinforced cores and adhesive was proposed for the construction of lightweight ships to resolve connection problems between bulkheads and decks of composite lightweight ship superstructures. Based on the design principles and mechanical properties of composite structures, the mechanical behaviour of the structure under a dangerous loading condition was investigated. In addition, the ultimate bearing capacities and damage modes were examined, the results of which demonstrated that the strength of the structure is weak, and that the adhesive and reinforced core between the face plate and the web plate is the primary weakness of the structure. A numerical simulation method was verified using the results of the mechanical tests, and five characteristic paths at the connection area were established. The stresses and displacements along the five paths were calculated using the numerical method. Then, variations in the geometric parameter and the strength and weight of the connection were summarised. The optimal angle of the adhesive bonding area is approximately 60°, which supports the optimal design and practical application of the lightweight ship adhesive-bonded connection structure.
Źródło:
Polish Maritime Research; 2020, 2; 145-157
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A structured approach for synchronising the applications of failure mode and effects analysis
Autorzy:
Alruqi, Mansoor
Baumers, Martin
Branson-III, David
Farndon, Robert
Powiązania:
https://bibliotekanauki.pl/articles/1836627.pdf
Data publikacji:
2021
Wydawca:
STE GROUP
Tematy:
Axiomatic Design
Design Structure Matrix
FMEA
synchronicity
Opis:
Failure Mode and Effects Analysis (FMEA) is a systematic approach for evaluating the potential failure modes in a system, and is mainly employed in three distinct tasks labelled: (1) Functional FMEA – evaluating those failures associated with product functional definition, (2) Design FMEA – analysing those failures associated with design definition and (3) Process FMEA – assessing potential failures in manufacturing and assembly processes. The literature review has shown limited works on the field of synchronising these different tasks into a working model. To address this gap, this research developed a framework for integrating these tasks of FMEAs, and then qualitatively validating the proposed framework. This research adopted a semi-structured questionnaire to collect experts’ feedback and validate the proposed framework. The t-test was then employed to evaluate the collected feedback. The findings highlight that the proposed framework is applicable and could facilitate the synchronisation of the different tasks of FMEA. This research presents a methodological approach for executing and synchronising FMEAs. Therefore, the proposed framework is practically relevant as an aid for the practitioners in catching the cascading failures and reducing the relevant impact.
Źródło:
Management Systems in Production Engineering; 2021, 3 (29); 165-177
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Construction of Railway Snowfall Protection Structure on Baku-Tbilisi-Kars Railway Corridor
Autorzy:
Cirulis, M.
Powiązania:
https://bibliotekanauki.pl/articles/384016.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
corrugated metal structures
railway snowfall protection structure design and construction
Baku-Tbilisi-Kars railway corridor rehabilitation and reconstruction
Opis:
Railway infrastructure is a vital transportation asset for many countries around the world and different geographic location may impose different challenges for train line operators. An example in Georgia is a snowfall related train line blockage during winter periods interrupting Baku-Tbilisi-Kars railway corridor. In 2011 ViaCon Georgia was appointed for construction of snowfall protection structure with the total length of 2.434km. The snowfall protection structure was a steel tunnel lining comprising Multi-plate 200mmx5mm corrugated steel plates. This article describes ViaCon Georgia involvement in this project starting from contribution to scheme design development to complete construction of the snowfall protection structure. At the time of construction this structure was known as the longest structure in the world of such type. Authors of this paper envisage sharing their experience from this project thereby contributing ongoing developments of steel culvert design and construction.
Źródło:
Archiwum Instytutu Inżynierii Lądowej; 2017, 23; 81-90
1897-4007
Pojawia się w:
Archiwum Instytutu Inżynierii Lądowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double-layer Fabrics with Folk Motives. Experimental and Theoretical Study of their Characteristics
Teoretyczne i eksperymentalne studium charakterystyk tkanin dwuwarstwowych z motywami ludowymi
Autorzy:
Kumpikaitė, E.
Kot, L.
Tautkutė-Stankuvienė, I.
Powiązania:
https://bibliotekanauki.pl/articles/231547.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
double-layer fabrics
Lithuanian folk motives
fabric structure design
tkaniny dwuwarstwowe
litewskie motywy ludowe
struktura tkanin
tekstura tkanin
Opis:
Nowadays authentic textile motifs are becoming very popular. The latest fashion trends show that the expressed relief and texture of fabrics are common. Combining these two tendencies, 8 fabrics of two-layer spatial structure were woven. It was established that the area density increases after finishing, the breaking force decreases, and the elongation at break increases. The abrasion resistance depends on the fabric structure. If fabric is woven with part A, the abrasion resistance increases after finishing, and if it is woven without part A, the abrasion resistance decreases. Theoretical calculation of area density of two-layer fabrics is presented. The formula suggested is accurate because the error is low.
Współcześnie autentyczne dwuwarstwowe tkaniny z motywami ludowymi stają się bardzo popularne. Ostatnie trendy mody wskazują, że uwidocznione struktura i tekstura są powszechne. Dla przeprowadzenia badań wyprodukowano osiem tkanin dwuwarstwowych. Stwierdzono, że gęstość powierzchniowa tkania wzrasta po wykończeniu, podczas gdy siła zrywająca maleje, a wydłużenie przy zerwaniu wzrasta. Odporność na ścieranie uzależniona jest od struktury tkaniny. Przeprowadzono analizę uzyskanych wyników i korelacji z badaną strukturą tkanin.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 6 (120); 100-108
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of Structure Design and Heat Treatment of an Integrated Consolidation Sensor and Embedded Temperature Sensing Fabric
Metoda projektowania struktury zintegrowanego czujnika temperatury wbudowanego w tkaninę
Autorzy:
Zhang, R.
Deng, N.
Cheng, B.
Wu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/949452.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
temperature sensing fabric
structure design
partial heat treatment
fabric testing
temperature value
tkanina
czujnik temperatury
częściowa obróbka cieplna
testy tkanin
wartość temperatury
Opis:
In order to solve the problem of temperature sensors easily slipping and improve the precision of temperature measurement in temperature sensing fabric, a specially designed fabric was developed. In this paper, the fabric comprised plain and multi-layered fabric. Sensors were embedded into the multi-layered fabric. The multi-layered fabric was treated by partial heat treatment to make the temperature sensors be fixed to the fabric. The temperature sensing fabrics were measured before and after the partial heat treatment. The results showed that during the heat treatment, the number of fabric layers and fabric organization had an effect on temperature measurement, and the values measured after partial heat treatment were closer to the true value than without treatment. In addition, with an increase in the number of fabric layesr, the values measured were closer to the real value. And the measurement results were closer to the true value when the multi-layered fabric’s organizational structure was plain.
Dla uzyskania hybrydowego elementu pomiarowego opracowano taką strukturę tkaniny aby móc umieścić w niej czujniki temperatury. Wielowarstwową tkaninę poddano odpowiedniej obróbce termicznej umożliwiającej zamocowanie czujników w tkaninie. Stwierdzono, że ilość warstw tkaniny i ich rozmieszczenie ma wyraźny wpływ na uzyskiwaną dokładność pomiaru temperatury. Przy zwiększeniu ilości warstw wzrastała dokładność pomiaru.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 5 (119); 68-72
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heterocyclic Salt Synthesis and Rational Properties Tailoring
Autorzy:
Shackelford, S. A.
Belletire, J. L.
Powiązania:
https://bibliotekanauki.pl/articles/358810.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
binary heterocyclic salts
heterocyclic salt synthesis
ionic liquids
bridged heterocyclic di-cation salts
rational structure design
predictive properties modification
tailored performance behavior
thermochemical
Opis:
Chemical structure determines the inherent properties displayed by a given compound, and these properties, in turn, produce a specifc performance behavior. Rationally designing chemical structure to predictably modify compound properties, such that performance behavior can be tailored in a controlled manner, defnes the objective of a pertinent synthesis effort. Achieving this objective by introducing structural alterations in a neutral covalent compound offers only one approach for resultant properties modifcation. Heterocyclic salts signifcantly enhance the fexibility for achieving properties modifcation via three strategic approaches: (1) compositionally pairing various cation structural classes with a number of anion structural classes, (2) systematically altering the structure of the cation; and, (3) systematically altering the structure of the anion. To illustrate this premise, four general synthesis methods to synthesize heterocyclic salts, including several new binary heterocyclium icosahedral closo-borane and closo- carborane salts, frst are outlined. Secondly, properties modifcation approaches of neutral covalent compounds are then compared with those approaches available for various heterocyclic salts. Lastly, a key example, using three unsaturated bridged heterocyclium di-cation salts, demonstrates how rational structure design, and its effect on resultant predictable properties modifcation, produces tailored performance behavior to reach the thermochemical initiation threshold needed for combustion. This is achieved with predictable properties modifcations that increase salt energy content, or that accelerate the reaction kinetics of the thermochemical initiation process.
Źródło:
Central European Journal of Energetic Materials; 2009, 6, 3-4; 219-237
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Establishing the optimum structures of technological processing of machine tools for the machining center
Autorzy:
Stîngaci, I.
Powiązania:
https://bibliotekanauki.pl/articles/95382.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
machining
technological dimensional structures
design dimensional structure
obróbka skrawaniem
struktura wymiarowa
Opis:
The following paper presents the processing of the piece on the machining centre. When the technological dimensional structures are optimal, they are similar to the dimensional structure of the piece. This similarity is ensured by using a marker of the machining centre - the axle of the revolving table. However, the piece has to be resized. It can be done in several variants with different machining accuracy required.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 2; 135-140
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer - aided design of production systems structures
Autorzy:
Mazurczak, J.
Kudelska, I.
Powiązania:
https://bibliotekanauki.pl/articles/409353.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
isolation of the production units
computer system
design of production structure
Opis:
The multi-step process of design enterprises design plays a prominent role production structure. The designer is forced to perform time-consuming and laborious, while simple calculations. To make this calculation, above all, to achieve optimal solutions is preferred computer support this work. The present program is apply to supporting the isolation of the complexity level I production units. Rusulting from the implementation of the data are the basic working material for the process of separation units. The authors of the first part describes the theoretical basis for isolation of the complexity level I production units. In the next part of the present computer program which support the process of calculation.
Źródło:
Research in Logistics & Production; 2014, 4, 4; 341-355
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizing the module structure of the program on the stage of its design
Autorzy:
Worwa, K.
Powiązania:
https://bibliotekanauki.pl/articles/409395.pdf
Data publikacji:
2018
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
program design
program modular structure
program structure optimization
Opis:
The paper proposes a formal method of determining the modular structure of the computer program by formulating and solution of the corresponding two-criterion optimization problem. A module strength coefficient and a module coupling coefficients were established as modularization criteria of the program. For the illustration of the considerations that have been discussed, a simple numerical example will be presented.
Źródło:
Research in Logistics & Production; 2018, 8, 1; 91-102
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic-based approach to the functional-modular structure design of packaging machines
Autorzy:
Varanitskyi, T
Palchevskyi, B
Powiązania:
https://bibliotekanauki.pl/articles/117989.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
packaging
machine
design
genetic algorithm
structure
Opis:
The paper presents a method for decomposition of packaging machine structure in order to provide the designer with choices for feasible assemblies. The aim is at providing a systematic approach to explore a large number of decompositions prior to the detailed component design phase. The structure is transformed to a graph with equivalent topology by a genetic algorithm.
Źródło:
Applied Computer Science; 2013, 9, 1; 54-68
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of wing parameters to achieve minimum weight at defined aerodynamic loads
Optymalizacja parametrów skrzydła minimalnej masy z uwzględnieniem ograniczeń do obciążeń aerodynamicznych
Autorzy:
Kachel, S.
Powiązania:
https://bibliotekanauki.pl/articles/280972.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
aircraft structure optimization
parametrical design systems
Opis:
The paper presents the method suitable for optimization of parameters and applied to design aircraft subassemblies on the example of a swept wing. It outlines the assumptions that are necessary to develop a mathematical model and describes constraints that served as the basis to develop an algorithm and describe the corresponding procedures in the GRIP (Graphics Interactive Programming) language that is a part of the CAD/CAM/CAE Unigraphics system. The further part of the study comprises discussion how the wing parameters and the mass functional are affected by the rigidity constraints and strength constraints. The algorithm for designing aircraft components was finally developed with inputs to the multicriteria design process “Web Modelling” of an aircraft body. The study also includes initial assumptions to algorithms originally developed by the author and dedicated to the modelling of components incorporated into aircraft structures.
W artykule zaprezentowano metodykę optymalizacji parametrów w zastosowaniu do projektowania zespołów samolotu na przykładzie skrzydła skośnego. Przedstawiono główne założenia niezbędne do opracowania matematycznego modelu. Opisano ograniczenia będące podstawą do utworzenia algorytmu i opisania procedur w języku GRIP (Graphics Interactive Programming) dla systemu CAD/CAM/CAE Unigraphics. Przeprowadzono dyskusję zmiany parametrów sztywnościowych i masy w zależności od ograniczenia obciążeniami aerodynamicznymi. Opracowano algorytm projektowania zespołów składowych samolotu z uwzględnieniem wejść do wielokryterialnego procesu projektowania Web Modelling bryły samolotu. W pracy zawarto założenia opracowanych przez autora i zastosowanych algorytmów modelowania elementów struktur lotniczych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 1; 159-170
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information aspects of optimization synthesis of functional-modular structure of technological equipment
Autorzy:
Palchevskyi, B.
Powiązania:
https://bibliotekanauki.pl/articles/118005.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
information technology
technological equipment
design
synthesis
structure
Opis:
The paper presents the information approach to the design of equipment with functional-modular structure. The advantages and drawbacks of various technologies of synthesis are shown.
Źródło:
Applied Computer Science; 2013, 9, 1; 17-33
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure equation as novel strategy for optimum reflector design
Autorzy:
Ou, Chung-Jen
Powiązania:
https://bibliotekanauki.pl/articles/174423.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
illumination design
light-emitting diodes
structure equation
Opis:
The optimal use of energy resources is the central dogma for green technology and bio-optics. Reflectors provide a simple and fundamental structure for energy transport from a light emitting diode (LED) chip, and an appropriately designed reflector can reduce the fabrication cost of secondary optics for the LED. This paper demonstrates the role of three proposed reflector geometric factors in the two performance metrics – uniformity and collected energy (power), for designing LED reflectors. Through canonical factor analysis, a linear structure equation for LED reflector is suggested, and the methodology for designing the optimal shape is discussed. In addition, a generalized factor and a synthesis response are proposed for a more comprehensive investigation of optical performance. Results indicate a key parameter for balancing the optical performance, and the effects of various parameters and the trade-offs are revealed.
Źródło:
Optica Applicata; 2020, 50, 1; 95-110
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology of large-scale objects system optimization
Autorzy:
Beskorovainyi, V.
Imanhulova, Z.
Powiązania:
https://bibliotekanauki.pl/articles/410841.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
large-scale objects
structure
design
reengineering
topology
optimization
Opis:
The analysis of system factors determining the efficiency of large-scale objects is performed. Structural description and purposes of large-scale objects constructing are formalized. A three-level decomposition scheme for the problem of objects system optimization including the set of tasks for their system design, planning of development, adaptation and reengineering is proposed. The composition and the scheme of relationship on input and output data of the tasks between main stages of large-scale objects system optimization are determined. Based on the decomposition of the problem, its systemological analysis was carried out. This allowed to develop a technology for system optimization of large-scale objects, taking into account the relationship between the whole set of problem-related tasks.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2017, 6, 4; 3-8
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Variety of Supply Chain Design: From a Standard Typology to a Relational Pragmatism
Autorzy:
Houé, Thierry
Guimaraes, Renato
Powiązania:
https://bibliotekanauki.pl/articles/504401.pdf
Data publikacji:
2017
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
collaboration
inter-firm coordination
organizational structure
supply chain design
Opis:
Supply chain management is at the heart of business strategy. The types of goods delivered are extremely varied and the way to deliver to the final consumer is more and more complex. Moreover, the relations between players within the supply chain take multiple shapes and have inevitably an impact on its design. This arena of complexity leads companies to use diverse kinds of relational approaches. But the relational view is itself a large field of study and a recent trend in supply chain management. It can be focuses on joint planning, coordination, and process integration between suppliers, customers, and other partners in a supply chain. Its benefits include cost reductions, an increasing reliability and a strong responsiveness to market needs. In addition, managing a sustainable supply chain involves today additional parameters like CO2 emissions reduction, energy consumption decrease, eradication of traffic congestion problems and the need for a better traceability. Besides, recent progresses in inter-companies’ communication technologies, along with a growing use of strategic partnering, has resulted in a large variety of alternative information systems approaches for supporting a collaborative supply chain management. Helped by theories and based on empirical data from specific cases companies, this exploratory and conceptual research shows the relative influence of various specific environments on the coordination of logistics flows, with a focus on relationships between different players. This work analyzes diverse types of supply chains and gives a framework confronted with some examples showing how different players create new models of logistics organization in particular situations.
Źródło:
Logistics and Transport; 2017, 34, 2; 5-14
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
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