Simulační model interakce člověka a sedačky s proměnným tlakovým profilem
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Abstract
Diplomová práce se zabývá tvorbou konečnoprvkového modelu interakce automobilové sedačky s implementovaným pneumatickým prvkem pro změnu tlakového profilu a člověka. Model byl sestaven pro účely hodnocení komfortu sezení a vyhodnocována je distribuce kontaktních tlaků.V práci je popsán proces vytvoření strukturované kombinované sítě na skenované geometrii sedáku. Materiálové modely jednotlivých částí sedáku byly identifikovány experimentálně. Na zjednodušeném modelu interakce sedáku bez pneumatického elementu a tuhého indentoru byla úspěšně provedena validace. Dále je popsán proces implementace pneumatického prvku.Model části lidského těla obsahuje pouze oblast mezi pasem a koleny, silové účinky ostatních částí jsou nahrazeny okrajovými podmínkami. Výsledky jsou porovnány s experimentálně získanými daty.
The thesis deals with the development of a finite element model of the interaction of a car seat with an implemented pneumatic element for changing the pressure profile and a human. The model was built for the purpose of evaluating seating comfort and the distribution of contact pressures is analysed.The process of creating mapped mesh with multiple element types on the scanned geometry is described. The material models of the different parts of the seat cushion were identified experimentally.Validation was successfully performed on a simplified model of the interaction of a seat cushion without a pneumatic element and a rigid indenter. The implementation process of the pneumatic element is also described.The human body part model contains only the region between the waist and knees, the force effects of the other parts are replaced by boundary conditions. The results are compared with experimentally obtained data.
The thesis deals with the development of a finite element model of the interaction of a car seat with an implemented pneumatic element for changing the pressure profile and a human. The model was built for the purpose of evaluating seating comfort and the distribution of contact pressures is analysed.The process of creating mapped mesh with multiple element types on the scanned geometry is described. The material models of the different parts of the seat cushion were identified experimentally.Validation was successfully performed on a simplified model of the interaction of a seat cushion without a pneumatic element and a rigid indenter. The implementation process of the pneumatic element is also described.The human body part model contains only the region between the waist and knees, the force effects of the other parts are replaced by boundary conditions. The results are compared with experimentally obtained data.
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Metoda konečných prvků, komfort sezení, sedáks proměnnou tuhostí, biomechanika, Finite element method, seating comfort, seat with adjustable stiffness, biomechanics