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    Wyświetlanie 1-11 z 11
    Tytuł:
    Efficiency of the constant interaction force vibroisolation (WoSSO)
    Autorzy:
    Dobry, M. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/279381.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    low-frequency passive vibroisolation
    efficiency of force vibroisolation
    Opis:
    In this paper, the force efficiency of the WoSSO vibroisolation in reducing forces transferred into the base by machines and the equipment working at low operating frequencies has been discussed. To assess that efficiency, a strongly non-linear mathematical model using Lagrange equations of the second kind has been developed. That model takes into account the specific design of the vibroisolator. The mathematical model has been solved using s digital simulation method, by developing a special computer program in the MATLAB/simulink environment. The efficiency of the force vibroisolation has been determined for a specific application of the WoSSO vibroisolator. The calculated force vibroisolation efficiency exceeds 32.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 1083-1091
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy analysis of a mechanical system with a dynamic vibration absorber
    Autorzy:
    Dobry, M. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/128266.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    energy flow
    dynamics of machines
    elimination of energy flow
    przepływ energii
    dynamika maszyn
    eliminacja przepływu energii
    Opis:
    The study relates to the phenomenon of power distribution in mechanical systems equipped with a dynamic vibration absorber. It is one of the methods of eliminating vibrations in a mechanical system, which stabilises its operation. This solution helps to reduce dynamic stress in subsystems of a vehicle's suspension or stabilise the motion of flying machines, such as helicopters. The article describes the phenomenon of power distribution of structural forces, which has not been described so far. The phenomenon reveals the power distribution in a dynamic structure of a system of interest and can be used to determine the rate of energy flow as a function of the dynamic state resulting from the selection of dynamic parameters of the vibration absorber. The energy analysis applied in the study is based on an energy-based optimization method of adjusting the dynamic vibration absorber to the main mechanical system without changing its dynamic parameters, as is the case, for example, in turbine rotor balancing.
    Źródło:
    Vibrations in Physical Systems; 2016, 27; 83-90
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparison of human physical models based on the distribution of power in a dynamic structure in the case of hand-arm vibrations
    Autorzy:
    Dobry, M. W.
    Hermann, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/280538.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    hand-arm vibrations
    biomechanical system
    power distribution
    Opis:
    The main aim of this study is to present an energy comparison of two human physical models taking into account hand-arm vibrations, which are based on the power distribution in their dynamic structure. The method used in the study takes advantage of a close relationship between the dynamics of the systems and energy-related phenomena that occur within them. The energy comparison of the two human physical models required construction of energy models of a Human-Tool system and finding their solutions. For this purpose, programs have been developed using the MATLAB/simulink software to simulate power distribution in the systems. The simulation revealed a discrepancy between the two models in terms of three types of powers and globally in the system as a whole.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 3-13
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparison of human physical models used in the ISO 10068:2012 standard based on power distribution. Part 2
    Autorzy:
    Dobry, M. W.
    Hermann, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/127696.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    biomechanical system
    energy flow
    energy method
    hand-arm vibrations
    układ biomechaniczny
    przepływ energii
    metoda energetyczna
    wibracje przenoszone na kończyny górne
    Opis:
    This article is a continuation of the article entitled „A comparison of human physical models used in the ISO 10068:2012 standard based on power distribution – Part 1” [5], which presented a method of energybased assessment of two human physical models. The first article revealed a discrepancy between the models in terms of three types of power and the total power. The focus of the present study was to determine the order of energy inputs in the dynamic structure and link different types of power to potential threats they pose to human health. Additionally, differences between the models were discussed.
    Źródło:
    Vibrations in Physical Systems; 2014, 26; 57-64
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparison of human physical models used in the ISO 10068:2012 standard based on power distribution. Part 1
    Autorzy:
    Dobry, M. W.
    Hermann, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/127817.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    biomechanical system
    local vibration
    power distribution
    układ biomechaniczny
    wibracje miejscowe
    rozdział mocy
    Opis:
    The study analyses differences in the flow of energy for two human physical models specified in the ISO 10068:2012 standard. For this purpose, two mathematical models of the Human–Tool system in question were developed using the Lagrange equation of the second kind. Corresponding energy models were then created for each mathematical model and tested by means of digital simulation in the MATLAB/Simulink environment. The study revealed a discrepancy between the models in terms of different types of power and in the total power.
    Źródło:
    Vibrations in Physical Systems; 2014, 26; 49-56
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the effectiveness of anti-vibration gloves. a comparison of the conventional and energy method. introduction - part one
    Autorzy:
    Hermann, T.
    Dobry, M. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/127845.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    biomechanical system
    local vibration
    energy method of assessment
    układ biomechaniczny
    drgania miejscowe
    energetyczna metoda oceny
    Opis:
    The article is an introduction to the assessment of the effectiveness of anti-vibration gloves. The assessment was conducted for a specific glove. The impact of the glove was taken into account in a model of the biodynamic system consisting of the human operator, the anti-vibration glove and the hand-held power tool. The synthetic model was created by integrating the physical model of the human body and the glove model specified in the International Standard ISO 10068:2012 with a model of an electric angle grinder. The first part of the study describes an alternative model of the glove, developed on the basis of experimental data. The article also presents a description of dynamic and energy models for analyzing dynamic structures of the biomechanical system. Results obtained at this stage are used to analyse and interpret the observed phenomena and to compare methods of assessing the effectiveness of anti-vibration gloves, which are discussed in detail in the second part.
    Źródło:
    Vibrations in Physical Systems; 2017, 28; 1-8
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in power distribution in the subsystems of the human – anti-vibration glove – tool system
    Autorzy:
    Dobry, M. W.
    Hermann, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/127968.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    biomechanical system
    hand-arm vibrations
    power distribution
    energy method
    układ biomechaniczny
    wibracje przenoszone na kończyny górne
    rozdział mocy
    metoda energetyczna
    Opis:
    The article continues the analysis presented in the article „Power distribution in anti-vibration gloves” [6], which described the approach adopted to construct an energy model of the Human – Glove – Tool system (H – G – T). The outcome of the analysis was the power distribution calculated only for the anti-vibration glove. This article continues the energy analysis for another subsystem of the H – G – T system – the human physical model. The energy method was also used to calculate the power distribution in its dynamic structure in order to account for interactions between the elements of the H – G – T system. The results obtained in the study indicate that the power distribution in the human physical model and in the glove model is completely different.
    Źródło:
    Vibrations in Physical Systems; 2016, 27; 91-98
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power distribution in anti-vibration gloves
    Autorzy:
    Hermann, T.
    Dobry, M. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/128059.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    biomechanical system
    hand-arm vibrations
    power distribution
    energy method
    układ biomechaniczny
    wibracje przenoszone na kończyny górne
    rozdział mocy
    metoda energetyczna
    Opis:
    The article analyses power distribution in an anti-vibration glove. The glove of interest was modelled in a biodynamic model of the Human – Glove – Tool system. The model was a combination of the human model and the glove model specified in the ISO 10068:2012 standard and the model of the vibration tool. To determine the power distribution in the glove, its energy model was developed. The power distribution in the model was determined using numerical simulation in order to show how power was distributed in the dynamic structure of the anti-vibration glove. Three kinds of powers were distinguished, which are related to forces of inertia, dissipation and elasticity. It turned out that out of the three kinds of powers identified in the anti-vibration glove, only one is dominant: namely the power of dissipation.
    Źródło:
    Vibrations in Physical Systems; 2016, 27; 115-122
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the effectiveness of anti-vibration gloves. A comparison of the conventional and energy method. Analysis and interpretation of results - part two
    Autorzy:
    Hermann, T.
    Dobry, M. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/128295.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    biomechanical system
    local vibration
    energy method of assessment
    układ biomechaniczny
    drgania miejscowe
    energetyczna metoda oceny
    Opis:
    The article is the second part of the article entitled “Assessment of the effectiveness of anti-vibration gloves. A comparison of the conventional and energy method. Introduction - part one” [4], which presents the assumptions and the construction of models of the biodynamic system consisting of the human operator, the anti-vibration glove and the hand-held power tool. The second part is devoted to a comparative analysis and interpretation of results obtained by means of the two methods. The analysis reveals a positive effect of the anti-vibration glove as a personal protective equipment, which reduces the operator’s exposure to vibrations generated by the angle grinder. However, the effectiveness of the glove was assessed differently by the conventional or the energy method. It was also found that the energy method was a better tool for analyzing the impact of vibrations at different phases of the tool’s operation.
    Źródło:
    Vibrations in Physical Systems; 2017, 28; 1-9
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in power distribution and health risk for the tool operator predicted by human physical models in the ISO 10068 : 2012 standard
    Różnice w rozdziale mocy i zagrożenia dla zdrowia Operatora w przypadku modeli fizycznych Człowieka z normy ISO 10068:2012
    Autorzy:
    Dobry, M. W.
    Hermann, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/140016.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hand-arm vibrations
    biomechanical system
    energy method
    wibracje przenoszone na kończyny górne
    system biomechaniczny
    metoda energetyczna
    Opis:
    The article presents an approach to assessing human physical models specified in the ISO 10068:2012 standard. The models were compared on the basis of energy analysis, which was conducted in terms of power distribution. Since the models in question have a fully specified internal structure, the investigation focused on power distribution in the models and the total power in the system. The article provides a description of the construction and energy-based modelling of Human-Tool systems. Simulation results obtained during the study were analysed in terms of health risks posed to the tool operator.
    W pracy przedstawiono sposób oceny modeli fizycznych człowieka z normy ISO 10068:2012. Modele porównano metodą energetyczną, która w prezentowanym przypadku została zrealizowana w dziedzinie rozdziału mocy. Badane modele posiadają w pełni określoną strukturę wewnętrzną, dlatego zwrócono uwagę na rozdział mocy w tych modelach oraz moc globalną w całym systemie. Przedstawiono proces budowy i modelowania energetycznego systemów Człowiek – Narzędzie. Zaprezentowano również wyniki symulacji oraz powiązano otrzymane wartości z zagrożeniami dla zdrowia człowieka.
    Źródło:
    Archive of Mechanical Engineering; 2015, LXII, 3; 333-346
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in energy flow in three directions in Human-Tool biomechanical systems based on spatial human physical models specified in the ISO 10068:2012 standard
    Autorzy:
    Dobry, M. W.
    Hermann, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/280536.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    biomechanical system
    energy flow
    hand-arm vibrations
    Opis:
    The article presents the differences in energy flow for two human physical models from ISO 10068:2012. The models are compared on the basis of a numerical simulation of energy flow implemented with MATLAB/simulink software. For purposes of comparison, the dynamics of the two Human-Tool systems is mathematically modelled and then used to derive their energy models. The model dynamic structures are fully specified in order to determine and compare three kinds of powers. The study revealed differences between the model characteristics when analysed along different directions of vibrations and as a whole.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2015, 53, 4; 789-798
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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