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Vibration Tests on the Helicopter BK117-C2

Degener, M. and Füllekrug, U. and Uerlings, P. (1999) Vibration Tests on the Helicopter BK117-C2. Project Report, DLR-Interner Bericht. 232-99 C 07. 68 S.

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Vibration tests were performed on a new prototype helicopter, the BK 117-C2. The tests were performed at the test laboratory of the DLR Institute of Aeroelasticity in Göttingen.The goal of the tests was to analyse the dynamic behaviour of the helicopter, to investigate the effect of different vibration absorbers, and to identify the modal parameters. During the tests the helicopter was suspended with an air spring in a special vibration test rig. Dynamic excitation forces were introduced at the rotor hub and the acceleration respones were measured at 128 structural points. In addition to the response measurements, the classical Phase Resonance Method was applied for the identification of important eigenmodes. After the termination of the tests the FRF measured during hub excitation were used for the identification of additional modes. The results are presented and discussed. The measurements of the test campaign delivered a comprehensive data base for rational selection of effective means for vibration reduction and control.

Item URL in elib:https://elib.dlr.de/14153/
Document Type:Monograph (Project Report, DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Vibration Tests on the Helicopter BK117-C2
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Open Access:No
Number of Pages:68
Keywords:structural dynamics, shake test, FRF measurement, BK117
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:29

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