MORPACK – Model Order Reduction PACKage
| Projectname: | MORPACK – Model Order Reduction PACKage |
| Contact: | Dr.-Ing. Volker Quarz |
| Objective target: | Automated generation of elastic bodies based on FE-models for application in elastic multi-body-simulation (EMBS). The automated process contains data import, model preparation (definition of connections and additional master-nodes), model order reduction (including back-transformation and mode-truncation), quality assurance by correlation techniques, and data export. An associated objective is the consideration of boundary conditions under inset-conditions by pre-simulation within the EMBS-assembly. |
The utilization of elastic bodies in elastic multi-body-simulation (EMBS) is state of the art, when simulating dynamic processes close to reality in machinery and its drive trains. The generation of elastic bodies based on FE-models makes up a crucial step, which nevertheless is little standardized yet. The whole process chain including model preparation, model reduction and export of the elastic body requires a lot of sub steps in different software. Thus, the process is barely automated, little user-friendly and very error-prone due to the variety of possible settings. The aim of the software MORPACK is to overcome these drawbacks. In the first place all sub steps and settings are systematized. In the following, the settings shall be determined automatically depending on the model, leading to the greatest possible automatization and standardization of the whole process.
The tool MORPACK is developed at the chair of dynamics and mechanism design and designed to reduce and validate FE-models by using alternative reduction techniques and suitable correlation techniques. By using MORPACK, the whole process for generating elastic bodies is combined in one tool. The generation is done automatically using a comfortable GUI and tailored to the special user requirements within the EMBS-process. MORPACK acts as an interface between FE-program and MBS-software (Figure 1).
Figure 1: Workflow at the example of ANSYS and SIMPACK using conventional software (top) and using MORPACK (bottom)
MORPACK is completely implemented in MATLAB and under research at the moment. The software is extended and improved continuously. Currently, MORPACK is not commercially available. For research-related cooperation or student research projects a temporary test version can be provided. Our services also cover the reduction and validation of your FE-models up to the generation of elastic bodies for SIMPACK. The associates of the chair are at your disposal for questions, demonstrations and inquiries at any time.
| Current status: | The software covers the whole generation process of elastic bodies and was tested and proved for numerous models of different size. For several settings an optimal pre-selection exists already. Right now, the final settings for the greatest possible automatization are determined using different verification models. The software is continuously extended and improved concerning user friendliness and efficiency. |
| Duration: |
seit 2017 2008 -2017 (Dipl.-Ing. Claudius Lein) |
| Funding/partner: | self-founding |
More detailed information about MORPACK ... , flyer for download
Publications:
- Beitelschmidt, M.; Lein, C.: Back-Transformation into Physical Configuration Space after Model Order Reduction onto a General Subspace. PAMM-Proceedings of Applied Mathematics and Mechanics, Vol. 15, November 2015, Accepted
- Lein, C.; Beitelschmidt, M.; Bernstein, D.: Improvement of Krylov-Subspace-Reduced Models by Iterative Mode-Truncation, 8th Vienna International Conference on Mathematical Modelling, Wien, Februar 2015.
- Lein, C.; Beitelschmidt, M.: Comparative study of model correlation methods with application to model order reduction. Tagungsband 26th ISMA (International Conference on Noise and Vibration Engineering), Leuven, Belgien, pp. 2683-2700, 2014.
- Lein, C.; Beitelschmidt, M.: Impact of Geometry Simplification and Element Size on the FEM-MBS-Coupling-Process, NAFEMS European Conference on Coupled MBS-FE Applications, Frankfurt, November 2013.
- Lein, C.; Beitelschmidt, M.: MORPACK-Schnittstelle zum Import von FE-Strukturen nach SIMPACK, at-Automatisierungstechnik, Jahrgang 60 (2012) Heft 9, Oldenbourg Wissenschaftsverlag, München, pp. 547-559.
- Lein, C.; Beitelschmidt, M.: MORPACK-Schnittstelle zum Import von FE-Strukturen nach SIMPACK. GMA-Fachausschuss 1.30, Salzburg, September 2011.
- Lein, C.; Beitelschmidt, M.: MORPACK interface for importing FE-structures into SIMPACK by using alternative MOR-methods, SIMPACK User Meeting, Salzburg, Mai 2011.
- Koutsovasilis, P., Beitelschmidt, M.: Model order reduction of finite element models: improved component mode synthesis. Mathematical and Computer Modelling of Dynamical Systems, Volume 16, Ausgabe I, Februar 2010 , pp. 57-73.
- Koutsovasilis, P.: Model Order Reduction in Structural Mechanics - Coupling the Rigid and Elastic Multi Body Dynamics. Dissertation, Technische Universität Dresden, 2009.
- Koutsovasilis, P., Beitelschmidt, M.: MORPACK Toolbox for Coupling Rigid and Elastic Multibody Dynamics. NAFEMS World Congress, 2009.