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Wyszukujesz frazę "dynamic forces" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Friction forces on the lubricated surfaces in micro and nano scale
Autorzy:
Wierzcholski, K.
Miszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/241987.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
AFM
experimental data
dynamic friction forces
Opis:
The present paper determines static and dynamic friction forces and friction coefficients using atomic force microscope during the hydrodynamic viscoelastic liquid flow in the thin boundary layer around the cells of two cooperating bodies. Atomic force microscope is necessary in performed experimental investigations and measurements of friction forces. Therefore, proper parameters of microscope are described and illustrated in specific enlargement. The use of microscope of atomic forces AFM for complex technical investigations to a large extent has facilitated carrying-out the measurements of tissue surface features and control of its growing process in human joint and deforming process in micro-bearing alloy. During conventional nano-scale measurements of surface topography, the AFM microscope makes it possible to simultaneously map local lateral forces and oscillatory phases of translations, which may be interpreted as a representation of local friction forces and local adhesive forces as well as values of elasticity modules. One of the important advantages of the AFM microscope application in the area of investigations with the use of bio-reactors is the possibility of carrying out measurements directly in liquid, namely that surrounds the cells or micro-bearing gaps
Źródło:
Journal of KONES; 2008, 15, 4; 597-602
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimization of dynamic forces in gear meshing by selection of the flexible couplings parameters
Autorzy:
Wojnar, G.
Powiązania:
https://bibliotekanauki.pl/articles/949494.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
couplings stiffness
couplings damping
power transmission systems
computer simulation
dynamic forces in meshing
Opis:
Torsional vibrations occur during drive systems operation. They may be especially hazardous if the freQuency of input functions is close to resonance frequency or if system resonance frequency is equal to subharmonic of input function frequency. What 's more, there is always a possibility of more than one resonance zone since the system is usually non-linear and multi-body. In design process of power transmission systems very important is correctly selection of the couplings parameters (especially flexibility). Couplings stiffness and damping have principle influence on shaft torsional vibrations. In case of power transmission with tooth gear the vibrations which are connected with dynamic forces in meshing. The paper presents influence of flexible couplings stiffness characteristics on dynamic forces in meshing. The investigations based on the measured couplings stiffness as well as damping and computer simulation ofpower transmission system with tooth gear operates at varying load. On the basis of conducted tests and analysis it may be stated that toothed wheels rotational speed increase does not always result in meshing dynamic forces increase. dynamic model ofdrive system with toothed gear is therefore a useful toolfor analysing couplings impact on meshing dynamic forces. This is illustrated by examples presented in current paper.
Źródło:
Journal of KONES; 2010, 17, 3; 497-504
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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