Temat: damping vibration - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelling of a glass gatherer robot arm with a frictional damper
Autorzy:: Stembalski, M.
Pres, P.
Skoczynski, W.
Turek, P.
Powiązania:: https://bibliotekanauki.pl/articles/99808.pdf
Data publikacji:: 2018
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: numerical model
damping vibration
glass gatherer
robot
Opis:: A numerical model of a friction damper used for damping vibration in glass gatherer robots was described. The damper with a lance was modelled using finite elements. Primary natural frequency of the system was determined. Numerical calculations were performed to determine the best operating parameters of the damper for excitations using a impulse of a force. Results of the damping decrement calculations for the friction damper model with a constant coefficient of friction and for the model, in which the coefficient of friction varied depending on the sliding velocity and the normal pressure occurring at the contact surfaces of the damper’s friction rings, were presented. Based on numerical simulations, the values of relative displacements between the damper’s friction rings were also determined.
Źródło:: Journal of Machine Engineering; 2018, 18, 4; 127-140
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Indicator of vibroacoustic energy propagation as a selection criterion of design solution
Autorzy:: Klekot, G.
Powiązania:: https://bibliotekanauki.pl/articles/176843.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: vibration damping
vibroacoustic energy propagation
Opis:: Contemporary tools which help to design technical objects refer to the conclusions drawn from studying the changes of physical processes accompanying the exploitation, especially to vibroacoustic processes. The main problem is to define such vibroacoustic measures, where their changes would model the analyzed physical phenomena in the best way. Basing on simple indicators which refer to occurring phenomena, it is possible to obtain accurate solutions with a satisfactory reliance level without using complex computing techniques needing detailed descriptors. According to the author, the indicators which are based on the analysis of vibroacoustic energy propagation are very useful in solving engineering problems. These indicators are useful while diagnosing the condition of technical systems, identifying and minimizing the vibroacoustic risks. The possibilities of using such indicators in order to find design solution are illustrated by sample results of the research of the structures with vibroacoustic elements which reduce the noise of rail vehicles by the rail vibration damping.
Źródło:: Archives of Acoustics; 2013, 38, 4; 489-494
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Electromagnetic damping of a mechanical harmonic oscillator with the effect of magnetic hysteresis
Tłumienie drgań mechanicznego oscylatora za pomocą elektromagnetycznego układu z pętlą histerezy
Autorzy:: Przybyłowicz, P. M.
Szmidt, T.
Powiązania:: https://bibliotekanauki.pl/articles/282031.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: damping of vibration
electromagnetic actuator
magnetic hysteresis
saturatio
Opis:: The paper presents a method of damping of mechanical vibrations by application of electromagnetic actuators. The physical phenomena that take place in such elements are related to magnetic induction and hysteresis. Induction, which consists in generation of electric current in a conductor placed within a variable magnetic field, has a precise quantitative description in form of the Faraday law. At the same time, magnetic hysteresis in ferromagnetic materials reflects the relation between magnetization of a given sample and magnitude of the external magnetic field that had been active during its whole history. Unfortunately, there is no at present a single commonly accepted model of this phenomenon. In this paper, some considerations by Bertotti (1998) are incorporated to this subject. The authors use a bilinear magnetization curve, which depicts the phenomenon of magnetic saturation. Analysis of the derived equations of motion of the coupled electromagneto-mechanical model revealed that the effect of hysteresis on reduction of vibration amplitude is rather of minor impact, however noticeable. At the same time, the electromagnetic damping itself is powerful. To support the conclusions, appropriate time histories, graphs of the logarithmic damping decrement as well as resonant characteristics are given here as in the previous authors’ paper.
W pracy przedstawiono metodę tłumienia drgań mechanicznych za pomocą aktuatorów elektromagnetycznych. Zjawiskami fizycznymi zachodzącymi w takich elementach wykonawczych są indukcja magnetyczna i histereza. Indukcja, polegająca na wytwarzaniu prądu elektrycznego w przewodniku znajdującym się w zmiennym polu magnetycznym posiada precyzyjny opis ilościowy w postaci prawa Faradaya. Natomiast histereza magnetyczna w ferromagnetykach oznacza zależność namagnesowania próbki od wartości zewnętrznego pola magnetycznego, jakie występowało przez całą jej historię. Niestety, w chwili obecnej nie ma jednego powszechnie akceptowanego modelu opisującego to zjawisko. Autorzy tej pracy wykorzystali pewne refleksje zaczerpnięte z publikacji Bertottiego (1998) na ten temat. W rozważaniach użyto dwuliniową charakterystykę magnesowania, co pozwoliło odzwierciedlić zjawisko magnetycznego nasycenia rdzenia. Przeprowadzona analiza rozwiązań wyprowadzonych równań ruchu elektromagneto-mechanicznego modelu układu wykazała, że uwzględnienie zjawiska histerezy ma niewielkie znaczenie, jakkolwiek zauważalne. Jednocześnie skuteczność samej metody tłumienia elektromagnetycznego jest znaczna. Na potwierdzenie tych tez autorzy tej jak i poprzedniej pracy zaprezentowali odpowiedzi czasowe, wykresy logarytmicznego dekrementu tłumienia oraz charakterystyki rezonansowe badanego układu.
Źródło:: Journal of Theoretical and Applied Mechanics; 2009, 47, 2; 259-273
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Advanced multi-functional coatings for vibration control of machining
Autorzy:: Rashid, Masud-U
Guo, Shuai
Adane, Tigist Fetene
Nicolescu, Cornel Mihai
Powiązania:: https://bibliotekanauki.pl/articles/99791.pdf
Data publikacji:: 2020
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: vibration damping
nanocomposite
damping coating
friction
cutting process
Opis:: The paper present theoretical and experimental studies of the energy dissipation performance of a composite structure composed in a multilayer nano-composite damping coating applied on a tungsten carbide shim and placed beneath the cutting insert. The coated shim placed closed to the cutting zone is subjected to high compressive and shear stresses as well as high temperature. Therefore, apart from high damping capacity it requires high stiffness and high thermal resistance. The coated shim dissipates the high frequency oscillations produced at the tool-chip and tool-workpiece interfaces during the chip forming process. The use of coated shims demonstrates that the tool life is considerably extended, while the machined surface integrity is improved. The Reuss model of the composite structure composed of a phase with a stiff, low loss factor and a phase with high loss factor is used to calculate the optimal coating thickness that gives high loss factor combined with high stiffness. The synthesis process of the coating material using HiPIMS process is discussed. The physical characteristics of the coating and the machining performance are presented in the experimental section.
Źródło:: Journal of Machine Engineering; 2020, 20, 1; 5-23
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Control-oriented modelling and control of rotor vibration
Autorzy:: Gosiewski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/387200.pdf
Data publikacji:: 2008
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: drgania wirnika
tłumienie drgań
rotor vibration
vibration damping
Opis:: Deep analysis of the control plant brings many useful information for the designer of the control system. The analysis is also important part in the design of active vibration control system. The coupling of different dynamical phenomena in rotating machinery leads to unstable vibrations. Usually, the coupling effects are caused by changing parameters. Angular speed or rotor unbalance in some applications are such parameters which change in the wide range. The problem is to find for which angular speeds we have unstable torsional/lateral vibrations. Usually, the unstable regions are in the vicinity of angular speeds where maps of natural frequencies for both dynamical systems cross each other. In the paper there was explained which intersection of torsional and lateral natural frequencies are unstable and why. The root locus method was used to explain the phenomenon. It indicated such control procedures which amplify the positive (stabilizing) mechanisms in the rotor dynamics. Such procedures can also lead to the energy saving control laws. In the case of lateral vibrations there were considered four control strategies. And these strategies were compared to indicate optimal one.
Źródło:: Acta Mechanica et Automatica; 2008, 2, 2; 21-38
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Analysis of dynamic properties and movement safety of bogies with diagonal links and rubber-metal vibration absorbers between the rubbing elements of freight cars
Autorzy:: Karassayeva, Assel
Adilkhanov, Yerzhan
Sekerova, Sholpan
Japayev, Saduakhas
Zhauyt, Algazy
Zhunisbek, Seitbek
Tergemes, Kazhybek
Powiązania:: https://bibliotekanauki.pl/articles/1833774.pdf
Data publikacji:: 2021
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: freight car
qualities
CSM
polymer
vibration damping
Opis:: This article aims to study experimentally the dynamic properties and traffic safety actions for gondola cars with bogies with diagonal links, operated on the territory of the Republic of Kazakhstan. The main results obtained during tests of gondola cars on bogie with diagonal links when they move along straight and curved sections as well as on switches are presented. The estimation of: dynamics coefficients, stability margin coefficients against derailment, lateral forces transmitted from the wheel to the rail, ratio of frame forces to a static load from the wheelset on the rails, and accelerations are made. The paper analyses the simulation of a polymer layer of rubber vibration absorber, to be installed between the rubbing surfaces, such as the link side of frame axle unit, and host unit is open-bearing, with lateral support of the three-piece freight car bogies, operating on the territory of the Commonwealth of Independent States. The model developed in this article consists of a rheological model of a Maxwell cell, a Fancher spring and an element which has the function of non-linearity. The simulation model can be used to study the characteristics of vibration dampers, gaskets and other power elements that have polymer properties and are installed at other types of transport and not only.
Źródło:: Journal of Machine Engineering; 2021, 21, 3; 124--143
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Neural network control design considerations for the active damping of a smart beam
Autorzy:: Cupiał, P.
Łacny, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/280299.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: neural network control
smart structures
vibration damping
Opis:: In this study, possible options for the active damping of a smart beam with piezoelectric patches using neural network control algorithm, are presented. The algorithms used for the control are Neural Direct Inverse and Feedback Linearisation (NARMA-L2). Additionally, several possible modifications used for the purpose of improving the control, such as different values of control gain or sampling time of the training data, as well as step-wise control are tested.
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 4; 767-774
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Control design of semi-active seat suspension systems
Projekt systemu sterowania semi-aktywnym układem zawieszenia siedziska
Autorzy:: Maciejewski, I.
Krzyżyński, T.
Powiązania:: https://bibliotekanauki.pl/articles/281846.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: vibration damping
semi-active suspension
control system
Opis:: The paper deals with the control design of semi-active seat suspension systems. A semi-active vibration control strategy basing on the inverse dynamics of a spring or damper element and a primary controller is studied. The optimisation procedure proposed in the paper makes it possible to calculate controller settings and these, in turn, to define vibroisolation properties of semi-active suspension systems.
W pracy przedstawiono sposób projektowania systemu sterowania semi-aktywnym układem zawieszenia siedziska. Analizowano algorytm sterowania semi-aktywnego, który bazuje na modelu odwrotnym elementu sprężystego lub tłumiącego oraz na kontrolerze głównym. Procedura optymalizacji zaproponowana w pracy dodatkowo wspomaga dobór nastaw regulatora, ktore to nastawy definiują właściwości wibroizolacyjne semi-aktywnego układu zawieszenia.
Źródło:: Journal of Theoretical and Applied Mechanics; 2011, 49, 4; 1151-1168
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Comparison of vector control methods for elimination of torsional vibrations in AC drives
Autorzy:: Gorel, L.
Szychta, E.
Powiązania:: https://bibliotekanauki.pl/articles/251612.pdf
Data publikacji:: 2013
Wydawca:: Instytut Naukowo-Wydawniczy TTS
Tematy:: tłumienie drgań skrętnych
damping of torsional vibration
Opis:: The paper compares three vector control strategies for elimination of torsion vibrations. The first algorithm is based on classical IPD controller of the system with flexible coupling described in state space. The second algorithm is based on force dynamics control and the third one exploits sliding mode control. All three algorithms respect vector control of synchronous motor with permanent magnets. Matlab-Simulink environment is used to evaluate performance of all three control algorithms.
Źródło:: TTS Technika Transportu Szynowego; 2013, 10; 479-488, CD
1232-3829
2543-5728
Pojawia się w:: TTS Technika Transportu Szynowego
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Numerical model of fricional damper for glas – making robot lance
Autorzy:: Stembalski, M.
Skoczyński, W.
Roszkowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/247991.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: robot
vibration damping
friction damper
numerical model
damping decrement
Opis:: The need to design a friction damper for glass-making robots arose because of the excessive vibrations, which occur in the course of their work. The robots are commonly used in the manufacture of glassware. The vibrations adversely affect the work of ball gatherers, which results in a large number of defects in the finished glass products. As a result of the vibrations molten glass may become unevenly distributed on the ball's surface and as the material flows down the ball into the mould the thermal conditions of its solidification may change. It is proposed to damp the vibrations by means of a prototype friction damper mounted directly on the ball gatherer lance. The glass-making robot lance with the friction damper was modelled. The vibrations of the glass-making robot lance tip under static load and impact excitation were measured during simulations. Also the relative displacements of the damper rings in the course of the excitations were measured. Moreover, the dependence between the preload force and the system's damping decrement was determined. The main aim was to select proper operating parameters for the proposed structure in order to obtain maximum system damping.
Źródło:: Journal of KONES; 2012, 19, 1; 391-398
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Torsional vibration silencers used in vessels propulsion systems
Autorzy:: Homik, W.
Powiązania:: https://bibliotekanauki.pl/articles/359576.pdf
Data publikacji:: 2014
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: crankshaft vibration
longitudinal vibration
torsional vibration of crankshaft
torsional vibration damping
Opis:: The main source of vibration in the engine piston is the work of the piston – crank, and swapping reciprocating motion to the rotary motion. In this paper are described among others the crankshaft vibration which result in the occurrence of cyclic forces such as forces pressure of gas and inertia forces. In addition were made the analysis of longitudinal vibration of the crankshaft, which are these vibrations are an important problem in high-power vessels’ engines. Regardless of the dynamic system in which the engine is running the greatest threat for crankshaft are the torsional vibrations. The possibilities of vibration damping of the crankshaft in the engine also were discussed.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 40 (112); 9-16
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Optimal Design of Piezoelectric Actuators for Shunt Damping Techniques
Autorzy:: Neubauer, M.
Powiązania:: https://bibliotekanauki.pl/articles/176597.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: piezoelectric transducer
piezoelectric shunt damping
piezoelectric energy harvesting
vibration damping
Opis:: In vibration control with piezoceramics, a high coupling of the piezoelement with the structure is desired. A high coupling improves the damping performance of passive techniques like shunt damping. The coupling can be influenced by a the material properties of the piezoceramics, but also by the placement within the structure and the size of the transducer. Detailed knowlegde about the vibration behavior of the structure is required for this. This paper presents an in-depth analysis of the optimal shape of piezoelectric elements. General results for one-dimensional, but inhomogeneos strain distribution are provided. These results are applied to the case of a longitudinal transducer and a bending bimorph. It is obtained that for maximum coupling, only a certain fracture of the volume should be made of piezoelectric material. . .
Źródło:: Archives of Acoustics; 2014, 39, 4; 615-622
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Vibration analysis of a half-car model with semi-active damping
Autorzy:: Ferdek, U.
Łuczko, J.
Powiązania:: https://bibliotekanauki.pl/articles/279944.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: semi-active damper
vibration damping
car suspension
hysteresis
Opis:: In this paper, analysis of a half-car model with linear and nonlinear semi-active dampers is performed. Using Matlab-Simulink software, a response of the system to a harmonic excitation of variable frequency and to an impulse excitation is found. The effect of both the distribution of spring-supported mass and the asymmetry of the support on the frequency characteristics of velocities and displacements at the mounting points of the dampers are analyzed. Additionally, characteristics of forces generated by the semi-active dampers and the response of the system when crossing an obstacle are determined.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 321-332
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Damping of torsional vibrations of ship engine crankshafts – general selection methods of viscous vibration damper
Autorzy:: Chomik, W.
Powiązania:: https://bibliotekanauki.pl/articles/260606.pdf
Data publikacji:: 2011
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: torsional vibrations
torsional vibration damping
torsional vibration dampers
crankshaft
natural vibration frequency
Opis:: This paper describes causes of torsional vibrations generated in ship engine crankshafts. Means for damping the torsional vibrations as well as general methods for selection of viscous torsional vibration dampers for a given type of engine are also presented. Exemplary results of calculations connected with selection of a viscous torsional vibration damper intended for a six-cylinder engine, are attached.
Źródło:: Polish Maritime Research; 2011, 3; 43-47
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Vibration analysis for vehicle with vacuum packed particles suspension
Autorzy:: Makowski, M.
Zalewski, R.
Powiązania:: https://bibliotekanauki.pl/articles/282085.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Vacuum Packed Particles
vibration damping
semi-active
smart materials
Opis:: The paper concerns an effect of the damping force controlling a vehicle suspension system. The investigated vehicle suspension system consists of innovatory Vacuum Packed Particles controllable dampers which allow controlling the vehicle body vibration. The main objective of performed and presented in the paper studies is to determine properties of the Vacuum Packed Particles (VPP) damper and propose a preliminary control strategy. The control in the vehicle suspension system can be realized by controlling the underpressure resulting in various jamming mechanisms in the granular core. Some algorithms of vibration control are also proposed and discussed.
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 109-117
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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