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A deformable terrain model in multi-domain dynamics using elastoplastic constraints: An adaptive approach
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
2015 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgaveAlternativ tittel
Modellering av deformerbar terräng med elastoplastiska bivillkor i flerkroppsdynamik: Ett adaptivt tillvägagångssätt (svensk)
Abstract [en]

Achieving realistic simulations of terrain vehicles in their work environment does not only require a careful model of the vehicle itself but the vehicle's interactions with the surroundings are equally important. For off-road ground vehicles the terrain will heavily affect the behaviour of the vehicle and thus puts great demands on the terrain model.

The purpose of this project has been to develop and evaluate a deformable terrain model, meant to be used in real-time simulations with multi-body dynamics. The proposed approach is a modification of an existing elastoplastic model based on linear elasticity theory and a capped Drucker-Prager model, using it in an adaptive way. The original model can be seen as a system of rigid bodies connected by elastoplastic constraints, representing the terrain. This project investigates if it is possible to create dynamic bodies just when it is absolutely necessary, and store information about possible deformations in a grid.

Two methods used for transferring information between the dynamic bodies and the grid have been evaluated; an interpolating approach and a discrete approach. The test results indicate that the interpolating approach is preferable, with better stability to an equal performance cost. However, stability problems still exist that have to be solved if the model should be useful in a commercial product.

sted, utgiver, år, opplag, sider
2015. , 55 s.
Emneord [en]
deformable terrain model, real-time simulations
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-108328OAI: oai:DiVA.org:umu-108328DiVA: diva2:852371
Eksternt samarbeid
Algoryx Simulation AB
Fag / kurs
Examensarbete i teknisk fysik
Utdanningsprogram
Master of Science Programme in Engineering Physics
Presentation
2015-08-28, Universitetsklubben, Umeå universitet, Umeå, 20:49 (svensk)
Veileder
Examiner
Tilgjengelig fra: 2015-09-09 Laget: 2015-09-08 Sist oppdatert: 2015-09-09bibliografisk kontrollert

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