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	~~{{DISPLAYTITLE:Nonlinear Modes of Jointed Structures by Malte Krack, March 2023}}~~
	~~==Nonlinear Modes of Jointed Structures==~~

	~~Malte Krack,~~

	~~University of Stuttgart, Germany~~

	~~March 2023~~

	~~===Abstract:===~~
	Normal modes characterize the vibration signature and simplify the quantitative analysis of the vibration response. Most work on nonlinear modes has focused on conservative, smooth systems. This stands in polar opposite to the dissipative, inherently non-smooth frictional contact interactions within joints. In the past decade, the Extended Periodic Motion Concept has proven itself as a useful definition for nonlinear modes in that case. This tutorial covers this concept, computational and experimental methods, single-nonlinear-mode theory, and nonlinear-mode-based reduced order modeling. Opportunities and limitations for the application to friction damping of turbine blades are demonstrated. Recent progress is also shown on fluid-structure interaction, substructuring and the effects of non-unique residual traction.



	~~===Biography:===~~

	Malte Krack obtained his doctoral degree in Mechanical Engineering at the University of Hannover, Germany, in 2014. In 2015 he joined Alexander Vakakis' group at the University of Illinois at Urbana-Champaign as a postdoctoral research fellow. In 2016, he was appointed as tenure-tracked professor at the University of Stuttgart in the Aerospace Engineering Department, where he became full professor in 2021. His primary research area is the nonlinear vibrations of structures subjected to contact nonlinearities. Activities span the range from the fundamental development of computational and experimental methods to application-oriented projects on friction damping and impact absorbers with the German turbomachinery industry.


	~~==Video Presentation ==~~
	~~{{#widget:Youtube~~
	~~\|id = fyRZIwDCllk~~
	~~\| height = 444~~
	~~\| width = 790~~
	}}



	~~[[Category:Seminar_Series]]~~

Msbonney: Created page with "{{DISPLAYTITLE:Nonlinear Modes of Jointed Structures by Malte Krack, March 2023}} ==Nonlinear Modes of Jointed Structures== Malte Krack, University of Stuttgart, Germany March 2023 ===Abstract:=== Normal modes characterize the vibration signature and simplify the quantitative analysis of the vibration response. Most work on nonlinear modes has focused on conservative, smooth systems. This stands in polar opposite to the dissipative, inherently non-smooth frictional..."

2023-03-28T19:37:26Z

Created page with "{{DISPLAYTITLE:Nonlinear Modes of Jointed Structures by Malte Krack, March 2023}} ==Nonlinear Modes of Jointed Structures== Malte Krack, University of Stuttgart, Germany March 2023 ===Abstract:=== Normal modes characterize the vibration signature and simplify the quantitative analysis of the vibration response. Most work on nonlinear modes has focused on conservative, smooth systems. This stands in polar opposite to the dissipative, inherently non-smooth frictional..."

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{{DISPLAYTITLE:Nonlinear Modes of Jointed Structures by Malte Krack, March 2023}}
==Nonlinear Modes of Jointed Structures==

Malte Krack,

University of Stuttgart, Germany

March 2023

===Abstract:===
Normal modes characterize the vibration signature and simplify the quantitative analysis of the vibration response. Most work on nonlinear modes has focused on conservative, smooth systems. This stands in polar opposite to the dissipative, inherently non-smooth frictional contact interactions within joints. In the past decade, the Extended Periodic Motion Concept has proven itself as a useful definition for nonlinear modes in that case. This tutorial covers this concept, computational and experimental methods, single-nonlinear-mode theory, and nonlinear-mode-based reduced order modeling. Opportunities and limitations for the application to friction damping of turbine blades are demonstrated. Recent progress is also shown on fluid-structure interaction, substructuring and the effects of non-unique residual traction.

===Biography:===

Malte Krack obtained his doctoral degree in Mechanical Engineering at the University of Hannover, Germany, in 2014. In 2015 he joined Alexander Vakakis' group at the University of Illinois at Urbana-Champaign as a postdoctoral research fellow. In 2016, he was appointed as tenure-tracked professor at the University of Stuttgart in the Aerospace Engineering Department, where he became full professor in 2021. His primary research area is the nonlinear vibrations of structures subjected to contact nonlinearities. Activities span the range from the fundamental development of computational and experimental methods to application-oriented projects on friction damping and impact absorbers with the German turbomachinery industry.

==Video Presentation ==
{{#widget:Youtube
|id = fyRZIwDCllk
| height = 444
| width = 790
}}

[[Category:Seminar_Series]]

Malte Krack March 2023 - Revision history

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