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Maszyny Dźwigowo-Transportowe
2002 nr 3 12-19
PL W pracy sformułowano zagadnienie modelowania modeli dynamicznych układów napędowych maszyn transportowych z zastosowaniem grafów sieciowych w reprezentacji macierzowej. Model dynamiczny sieci przepływowej określono wprowadzając zmienne biegunowe w wierzchołkach sieci oraz zmienne przepływowe przypor[...]
EN In the paper the problem of the analysis of the modelling of the dynamical models of the driving systems by use of the networs graphs in the matrix representation has been formulated. In the paper the isomorphoused with the driving system the potencial networks graphs are shown. There the hybrid bon[...]
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International Journal of Applied Mechanics and Engineering
EN This paper presents the various kinds of friction forces occurring in human joint gap. Author indicates some main factors which can change the friction forces in human joint. Friction forces for squeezing, boosted squeezing and weeping in macro, micro and nano level for porous cartilage are presente[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The problem addressed in the paper is the description of an effort and durability of components under the conditions of mechanical and thermal interactions. The problems of proper material testing methods have been shown as the important part of the components life assessment methodology. D[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this paper is to compare the transients of characteristics obtained by the approximate method and exact one and to answer to the question – if the method can be used to nominate the characteristics of mechatronic systems. Design/methodology/approach: was to nominate the relevance or irre[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The main problem addressed in the paper is the description of an effort and durability of steam pipelines under the conditions of mechanical and thermal interactions. Design/methodology/approach: The FEM modelling has been used to determine the stress and strain fields in the pipelines and[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this paper is the application of the synthesis method according to realization of mobility or immobility function into partial fraction when the level of the denominator of characteristic is higher than the level of its numerator. Design/methodology/approach: was formulated and formali[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The purpose of this paper is application of approximate method of solving the task of assignment the frequency-modal analysis and characteristics of flexibly vibrating mechatronic system. Design/methodology/approach: The main approach of the subject was to formulate and solve the problem in[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this paper is the application of the approximate method called Galerkin's method to solve the task of assigning the frequency-modal analysis and characteristics of a mechatronic system. Design/methodology/approach: was the formulated and solved as a problem in the form of a set of differ[...]
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Archives of Materials Science and Engineering
EN Purpose: The investigations aim to propose a model for arresting an electrical opening of a crack which weakens a narrow, poled and infinite piezoelectric strip. The edges of the strip are subjected to uniform, constant anti-plane stresses and in-plane electrical displacements. Design/methodology/ap[...]
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Problemy Eksploatacji
2001 nr 2 193-201
PL Przedstawiono sposób wyznaczania sił wewnętrznych w kadłubie statku, wywołanych zderzeniem kadłuba ze skałą. Opis zjawiska zderzenia oraz ocenę jego skutków oparto na analitycznym i numerycznym całkowaniu równań ruchu kadłuba modelowanego liniowo-sprężystą, cienkościenną belką. Posługując się modele[...]
EN Stress determination in the ship's hull during the collision with a rock is presented. The description of the crash phenomena and the results assessment is based on the numerical and analytical integration of the moving equations of the hull modelled with the linear-elastic thin-walled beam. Using t[...]
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International Journal of Applied Mechanics and Engineering
2014 Vol. 19, no. 2 435--440
EN A nonperturbative approximate analytic solution is derived for the time fractional Fokker-Planck (F-P) equation by using Adomian’s Decomposition Method (ADM). The solution is expressed in terms of Mittag-Leffler function. The present method performs extremely well in terms of accuracy, efficiency an[...]
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Nowoczesne Budownictwo Inżynieryjne
2009 Nr 1 86-88
PL Życiorys "ojca mechaniki stosowanej" Stephena Timoshenki. W artykule przedstawione zostały jego losy do roku 1922, kiedy to opuścił na stałe Europę i wyemigrował do Ameryki.
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Nowoczesne Budownictwo Inżynieryjne
2010 Nr 4 70-72
PL W numerze 1 (22) "Nowoczesnego Budownictwa Inżynieryjnego" z 2009 r. ukazała się pierwsza część materiału poświęconego prof. Stephenowi Timoshence (Stiepanowi Prokofiewiczowi Timoszence) 1878.1972, światowej sławy specjaliście w dziedzinie mechaniki stosowanej Artykuł ten opisywał działalność profes[...]
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Archives of Materials Science and Engineering
EN Purpose: The main purpose of the work is the description of conditions of fatigue process of power plant components working under mechanical and thermal loading. The work focuses on the chosen component characteristics. The issue of influence of the heat transfer conditions on the component surface [...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this thesis is dynamical analysis of complex systems in transportation. Analyzed systems are composed of rotatable rods. Transportation was defined as main motion of rods and the overall system. Design/methodology/approach: The dynamical flexibility method is a leading methodology for dy[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The investigation aims at proposing a model for cracked piezoelectric strip which is capable to arrest the crack. Design/methodology/approach: Under the combined effect of electrical and mechanical loadings applied at the edges of the strip, the developed saturation zone is produced at each[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this paper is to investigate the transients of characteristics of vibrating beams obtained by the exact and approximate methods and to answer to the question – if the method can be used to nominate the characteristics of mechatronic systems. Design/methodology/approach: was to nominate t[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: of this thesis is derivation of dynamical flexibility of the free-free rod system in transportation. The well-known problem of dynamical analysis of systems in rotational transportation was developed in this work to systems with taking into consideration damping forces. Design/methodology/a[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The main purpose of this work is the description of the mechanical behaviour of power plant components working under mechanical and thermal loading that cause the thermo-mechanical fatigue fracture in selected areas of the component surfaces. Design/methodology/approach: The computer modell[...]
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Journal of Achievements in Materials and Manufacturing Engineering
EN Purpose: The paper discusses the issue of modelling the heating and cooling processes of T-pipes in a power plant pipeline in the start-up conditions of a boiler. The main purpose of this work is the description of the mechanical behaviour of power plant components working under mechanical and therm[...]
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