Temat: element engine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of thermal and mechanical stresses of Renault Premium DXi11 460 EEV four-stroke piston
Autorzy:: Kaliszewski, M.
Mazuro, P.
Powiązania:: https://bibliotekanauki.pl/articles/245402.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: heat transfer
temperature distribution
four-stroke engine piston
finite element method
1D combustion
Opis:: In this article the engine piston Renault Premium DXi11 430 460 EEV has been analysed using the Finite Element Method. Analysis consider as well heat transfer phenomenon as the thermal and mechanical strains of the piston. Simulations were performed for the point of engine maximum power. Piston material was assumed to be 40HM (1.7225) steel and its properties are delivered basing on available scientific papers. The simulation assumed mean values of heat transfer coefficient, reference temperature and cycle pressure based on engine data, maximum power engine work simulation in AVL Boost software and literature. Part of boundary condition (e.g. cylinder wall temperature) was assumed basing on authors’ engineering intuition and experience. The resulting temperature distribution in the piston was implemented for geometrically nonlinear mechanical FEM analysis. Both the analysis of thermal stresses and stresses of the hot piston in the top dead centre were performed.
Źródło:: Journal of KONES; 2018, 25, 2; 169-175
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Mechanical and thermal stresses issues related to a size of a four-stroke piston based on a Renault Premium DXi11 430 460 EEV engine
Autorzy:: Kaliszewski, M.
Mazuro, P.
Powiązania:: https://bibliotekanauki.pl/articles/242061.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: heat transfer
temperature distribution
four-stroke engine piston
finite element method
size related issues
Opis:: The size of an engine is one of the factors affecting its thermal efficiency. It is known that with an increase of the size of the engine, the cubic capacity and heat generation grows in the third power, whereas thermal losses are proportional only to the second power of the size (due to heat exchange surface). However, the increase in the size of the engine generates some problems related to its mass, rotational speed and heat load, the last of which is a subject of these considerations. In the article, the influence of the piston size on its thermal and mechanical stresses is considered. Similar boundary conditions for both cases were assumed. Simulation of the steady-state heat transfer and mechanical simulation were carried out using the Finite Element Method. In each analysis, both the original version of the piston and its scaled version were considered. The boundary conditions were adopted on the basis of engine catalogue data and available literature. The results of analyses were discussed.
Źródło:: Journal of KONES; 2018, 25, 3; 275-282
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Software for the dynamic analysis of machines placed on elastic pads
Autorzy:: Murawski, L.
Powiązania:: https://bibliotekanauki.pl/articles/243603.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine engine
elastic foundation of power plant
rigid finite element
elastic pads
rubber couplings
non-linear characteristics of rubber machine elements
Opis:: Software DYNMACH has been designed for the dynamic analysis (vibrations) of machines placed on elastic foundation pads assuming non-linear foundation characteristics. Floating platforms of marine engines are designed for noise and vibration isolation between ship hull and engine. Excessive loadings acting on ship hull can be also eliminated by elastic foundation. Analysis of that kind of marine machines is the main target of presented software. It has been assumed that the machines are modeled as rigid bodies while the foundation is treated as a set of elements of non-linear elastic-damping characteristics. Software DYNMACH is the implementation of the Rigid Finite Element Method. A machine can be modeled as a single rigid finite element composed of an arbitrary number of elementary rigid bodies. The following rigid body types are available in the library of the program: a plate, a brick, and a full cylinder. Elastic elements used for foundation modeling can have non-linear stiffness and damping characteristics. These characteristics can be assumed as functions of the foundation displacement or the expected excitation frequency. A built system can be loaded by an arbitrary number of static forces. These static forces are used for a preliminary calculation of strains and the centre of equilibrium, as well as for determination of the stiffness and damping coefficients of the non-linear elastic damping elements in the equilibrium position. Program DYNMACH can calculate the frequencies and modes of natural vibration of the loaded system, as well as calculates of system responses to dynamic excitations. Assuming only small vibration amplitudes the dynamic behaviour of the system can be considered as linear, however, this linear behaviour is imposed on the non-linear equilibrium conditions obtained from the solution of the coupled static problem. Database of different types of rubber machines couplings has been build-in the DYNMACH software.
Źródło:: Journal of KONES; 2013, 20, 2; 307-314
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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