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On real-time pseudo-dynamic sub-structure testing: algorithm, numerical and experimental results

Bayer, V. and Dorka, U.E. and Füllekrug, U. and Gschwilm, J. (2005) On real-time pseudo-dynamic sub-structure testing: algorithm, numerical and experimental results. Aerospace Science and Technology, 9, pp. 223-232.

Full text not available from this repository.

Abstract

The real-time pseudo-dynamic sub-structure (SubPSD) test is a new procedure for dynamic testing of structures. Here, the actual test specimen is a part, i.e. sub-structure, of a larger, complex system. The main structure is simulated on a computer which is in interaction with the test rig. One possible application is the qualification test of a payload (sub-structure) mounted in a carrier rocket (computer model). Consideration of the interaction between main- and sub-structure will yield more realistic results than conventional shaking table tests. This can be a good basis for a more effective, light-weight design of the payload. An algorithm is presented, which is based on the Newmark time domain solution of the equation of motion. It uses sub-stepping instead o iteration to reach equilibrium within each time step. This algorithm and a suitable hardware allow for true real-time performance of the SubPSD test, even with oscillatory sub-structures. Numerical studies are presented which demonstrate the accuracy but also the limits of the procedure. Experimental results of a 4 d.o.f. test model are compared to the numerical results.

Item URL in elib:https://elib.dlr.de/14538/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2005,
Title:On real-time pseudo-dynamic sub-structure testing: algorithm, numerical and experimental results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bayer, V.UNSPECIFIEDUNSPECIFIED
Dorka, U.E.UNSPECIFIEDUNSPECIFIED
Füllekrug, U.UNSPECIFIEDUNSPECIFIED
Gschwilm, J.UNSPECIFIEDUNSPECIFIED
Date:2005
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:9
Page Range:pp. 223-232
Status:Published
Keywords:structural dynamics, qualification testing, real-time simulation of the dynamic environment, sub-structure testing
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:58

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