Virtual prototypes, e.g., finite element models, are commonly used to reduce the development times of a new machine tool generation. However, the accuracy of these models is often limited by their representation of damping effects and the possibility to efficiently simulate the dynamic behavior in different axis positions. This paper shows the changing local damping distribution within a single-axis machine tool configuration for different axis positions. Based on this investigation, an approach to accurately model the position-dependent dynamics, while keeping the calculation times small, is presented. The virtual model of the machine is divided in several substructures, which consider the local damping behavior of each dissipation source. The reduced mass, stiffness, and damping matrices are coupled in the desired machine position by using multipoint constraints, which are generated at the desired machine position after the reduction of the substructures. Four different approaches to apply multipoint constraints on reduced substructures are compared, followed by an investigation of their influencing parameters. The most promising approach is compared with a model without local damping representation as well as a model without substructuring. By considering the local damping effects within the finite element model and coupling the reduced models of each component in arbitrary axis positions, an efficient analysis and optimization of the dynamic behavior of a machine tool over the whole workspace can be conducted.
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July 2019
Research-Article
Substructure Coupling of a Machine Tool in Arbitrary Axis Positions Considering Local Linear Damping Models
Thomas Semm,
Thomas Semm
1
Institute for Machine Tools and Industrial Management,
Department of Mechanical Engineering,
Boltzmannstr. 15,
85748 Garching,
e-mail: Thomas.Semm@iwb.mw.tum.de
Department of Mechanical Engineering,
Technical University of Munich (TUM)
,Boltzmannstr. 15,
85748 Garching,
Germany
e-mail: Thomas.Semm@iwb.mw.tum.de
1Corresponding author.
Search for other works by this author on:
Michael B. Nierlich,
Michael B. Nierlich
Institute for Machine Tools and Industrial Management,
Department of Mechanical Engineering,
Boltzmannstr. 15,
85748 Garching,
e-mail: m.nierlich@gmx.net
Department of Mechanical Engineering,
Technical University of Munich (TUM)
,Boltzmannstr. 15,
85748 Garching,
Germany
e-mail: m.nierlich@gmx.net
Search for other works by this author on:
Michael F. Zaeh
Michael F. Zaeh
Institute for Machine Tools and Industrial Management,
Department of Mechanical Engineering,
Boltzmannstr. 15,
85748 Garching,
e-mail: Michael.Zaeh@iwb.mw.tum.de
Department of Mechanical Engineering,
Technical University of Munich (TUM)
,Boltzmannstr. 15,
85748 Garching,
Germany
e-mail: Michael.Zaeh@iwb.mw.tum.de
Search for other works by this author on:
Thomas Semm
Institute for Machine Tools and Industrial Management,
Department of Mechanical Engineering,
Boltzmannstr. 15,
85748 Garching,
e-mail: Thomas.Semm@iwb.mw.tum.de
Department of Mechanical Engineering,
Technical University of Munich (TUM)
,Boltzmannstr. 15,
85748 Garching,
Germany
e-mail: Thomas.Semm@iwb.mw.tum.de
Michael B. Nierlich
Institute for Machine Tools and Industrial Management,
Department of Mechanical Engineering,
Boltzmannstr. 15,
85748 Garching,
e-mail: m.nierlich@gmx.net
Department of Mechanical Engineering,
Technical University of Munich (TUM)
,Boltzmannstr. 15,
85748 Garching,
Germany
e-mail: m.nierlich@gmx.net
Michael F. Zaeh
Institute for Machine Tools and Industrial Management,
Department of Mechanical Engineering,
Boltzmannstr. 15,
85748 Garching,
e-mail: Michael.Zaeh@iwb.mw.tum.de
Department of Mechanical Engineering,
Technical University of Munich (TUM)
,Boltzmannstr. 15,
85748 Garching,
Germany
e-mail: Michael.Zaeh@iwb.mw.tum.de
1Corresponding author.
Manuscript received February 3, 2019; final manuscript received May 9, 2019; published online May 30, 2019. Assoc. Editor: Tony Schmitz.
J. Manuf. Sci. Eng. Jul 2019, 141(7): 071014 (8 pages)
Published Online: May 30, 2019
Article history
Received:
February 3, 2019
Revision Received:
May 9, 2019
Accepted:
May 10, 2019
Citation
Semm, T., Nierlich, M. B., and Zaeh, M. F. (May 30, 2019). "Substructure Coupling of a Machine Tool in Arbitrary Axis Positions Considering Local Linear Damping Models." ASME. J. Manuf. Sci. Eng. July 2019; 141(7): 071014. https://doi.org/10.1115/1.4043767
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