RUM2021 RUM2021-EuroCentral CustomerPresentation
Abstract:
Today, a wide variety of wheelchairs enable users to participate in everyday life and leisure activities. Further, developments such as lightweight construction and support via electric drives have steadily expanded the range of applications. However, this is also accompanied by increased stresses on the body.
The topic of body vibration is usually not in the focus of wheelchair development. However, these occur in everyday life and increase the surface pressure or the internal tissue strains of the body. An evaluation of vibration loads is usually made via the amplitudes on the seat surface. The influence on tissue stresses is currently not taken into account, as it cannot be determined experimentally.
Using a virtual human model like Jo in combination with Fe model of a wheelchair enables this kind of analysis. The presentation will first cover the introduction of typical vibration levels. Second the virtual human Jo and its validation will be shown. Finally, a vibration analysis using Abaqus Explicit will be presented and the influence on the tissue loads will be evaluated.
Speaker Info:
Dr. Alexander Siefert has a M.Sc. degree in Computational Mechanics from the Univeristy of Stuttgart (2003). He started is professional career at Wölfel engineering as a project engineer in 2003. In 2013 he finished his phd study at the TU Darmstadt with the topic: Numerische Modellierung und Experimentelle Validierung der passiven und aktiven mechanischen Eigenschaften des menschlichen Gewebes und dessen Implementierung in ein Ganzkörpermodell. From 2013 to 2018 he was Engineering Director for Numerical Simulation at Wölfel Engineering
Since 2018 he is shareholer and managing director of SIMUSERV. He is an expert in human modeling, biomechanics and has published several national and international papers.
