Generic Modelica Framework for MultiBody Contacts and Discrete Element Method

The objective is to model and simulate larger and more complex 3-dimensional systems as it is possible with a pure equation-based modeling system such as Modelica. The approach shall combine component-based 3D modeling, as used in modern game engines, with equation-based modeling. The proposed methodology has been evaluated and tested in the experimental modeling environment Modia3D that is implemented with the Julia programming language.

Section: Relation To Other Workmentioning

confidence: 99%

Component-Based 3D Modeling of Dynamic Systems

Neumayr

Otter

2019

“…Many real life situations involve bodies in contact or colliding bodies. Playmola utilizes the new functionality available in Dymola for contact handling (Elmqvist, et al, 2015). It is therefore possible to put some boxes on a table (big box), set initial rotation speed on one of the boxes, and experience the domino effect as shown in Figure 11.…”

Section: Bodies In Contactmentioning

confidence: 99%

“…The paper (Elmqvist, et al, 2015) presents details about modeling with triangular meshes. A popular representation is an array of 3D vertices and an array of triangles defined as 3 indices into the vertices array.…”

Section: Proposed Extensions To Modelicamentioning

confidence: 99%

3D Schematics of Modelica Models and Gamification

Elmqvist¹,

Baldwin

Dahlberg

2015

Self Cite

Block diagrams have been used for a long time to express data flow in dynamic models, i.e. the input output relations between calculation blocks. SysML diagrams are also used to express other relations such as component hierarchy and inheritance. Modelica uses object diagrams, a generalization of block diagrams since acausal connections are allowed. CAD uses a 3D representation to represent the assembly of a mechanism, i.e. how bodies are coupled with joints. This paper describes a generalization of object diagrams, called 3D Schematics, to utilize 3D representations of the icons/shapes and unification with assembly diagrams and exploded views.The ideas have been prototyped in a program called Playmola which is inspired by computer games. The goal is to make a model authoring environment that is much more intuitive and fun than existing ones. The hope is that such a tool would be used to promote science for students already in high-school.

“…The Modelica standard library 1 supports the modeling of 3dimensional multi-body systems with its sub-library Modelica.Mechanics.MultiBody (Otter et al, 2003). There have been several attempts to improve this library with regards to visualization, collision handling or support of larger models, for example (Otter et al, 2005;Höger et al, 2012;Hofmann et al, 2014;Elmqvist et al, 2015;Bardaro et al, 2017). Over the years it was recognized that this is hard because the technology of current Modelica has some natural limitations:…”

Section: Introductionmentioning

confidence: 99%

Algorithms for Component-Based 3D Modeling

Neumayr¹,

Otter²

2019

The experimental modeling environment Modia3D is used to test and evaluate ideas to model and simulate larger and more complex 3-dimensional systems than is possible with a pure equation-based modeling system such as current Modelica. The goal is to closely combine equation-based modeling with component-based 3D modeling as used in modern game engines. In this article some key algorithms are discussed that have been developed for Modia3D. The overall objective is to utilize the results for the design of the next Modelica language generation.