Vývoj výpočtového modelu dynamiky piestu

Development of Computational Model of Piston Dynamics Behaviour

conference paper

en

Sooner or later, the development process of each technical product, inevitably, reaches a phase when several other design proposals are being compared. But based on what is the best design chosen? Engineers all around the world have a challenging task to find the best compromise among numerous aspects—e.g. manufacturing, cost, functionality, reliability etc.—especially in contemporary phenomenon of endless minimization of all kinds of losses. To estimate the operational lifetime characteristics, i.e. wear, friction, noise and vibration and others, test benches are widely used. Most of the time, they offer accurate results, but the insight in to the physics is lost. On the other hand, simulation tools can clarify the details during the product’s operational cycle but the disadvantage lays within the adequacy of the algorithms used. Therefore, computational models are often verified by the test results. Only then their full potential can be exploited, providing fast and reliable results with translucent insights into the true physics behind it. The following paper presents the development of one such computational model focused on the investigation of piston dynamics behavior.

Skôr či neskor, vývojový proces každého technického produktu dosiahne fázu, v ktorej je porovnaných niekoľko návrhov. Ale na základe čoho je vybraný najlepší dizajn? Inžinieri po celom svete majú náročnú úlohu nájsť kompromis medzi niekoľkými aspektami – vyrobiteľnosť, cena, funkčnosť, spoľahlivosť a iné – zvlášt dôležité v súčasnom fenoméne znižovania akýkoľvek foriem strát. Na určenie dlhodobých provozných prejavov ako opotrebienie, trenie, vibrácie a hluk a iné, sa používajú experimentálne zariadenia. Tie zväčša ponúkajú dostatočne presné výsledky, ale detailný pohľad na skúmaný dej je veľmi obtiažny. Na druhú stranu, výpočtové nástroje ponúkajú možnosť nahliadnutia do detailov, ale nevýhoda spočíva vo vhodnosti použitých algoritmov. Preto sú výpočtové modely často overované s experimentálnymi výsledkami. Len tak dokážu napniť svoj potenciál a produkovať rýchle a spoľahlivé výstupys. Tento článok popisuje vývoj takéhoto výpočtového modelu zameraného na vyšetrenie dynamického správania piestu.

Sooner or later, the development process of each technical product, inevitably, reaches a phase when several other design proposals are being compared. But based on what is the best design chosen? Engineers all around the world have a challenging task to find the best compromise among numerous aspects—e.g. manufacturing, cost, functionality, reliability etc.—especially in contemporary phenomenon of endless minimization of all kinds of losses. To estimate the operational lifetime characteristics, i.e. wear, friction, noise and vibration and others, test benches are widely used. Most of the time, they offer accurate results, but the insight in to the physics is lost. On the other hand, simulation tools can clarify the details during the product’s operational cycle but the disadvantage lays within the adequacy of the algorithms used. Therefore, computational models are often verified by the test results. Only then their full potential can be exploited, providing fast and reliable results with translucent insights into the true physics behind it. The following paper presents the development of one such computational model focused on the investigation of piston dynamics behavior.

piest, tribológia, mechanické straty, multibody dynamics, elastohydrodynamické mazanie

piston, tribology, mechanical loss, multibody dynamics, elastohydrodynamic lubrication

09.05.2016

Institute of Thermomechanics Academy of Sciences of the Czech Republic, v.v.i.

Prague, Czech Republic

978-80-87012-59-8

ENGINEERING MECHANICS 2016 - 22nd INTERNATIONAL CONFERENCE

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126–129

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