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Influence of Contact Points of Helicopter Skid Landing Gears on Ground Resonance Stability

Lojewski, Reinhard and Keßler, Christoph and Bartels, Rainer (2020) Influence of Contact Points of Helicopter Skid Landing Gears on Ground Resonance Stability. CEAS Aeronautical Journal. Springer. doi: 10.1007/s13272-020-00452-z. ISSN 1869-5582.

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Abstract

Soft-in-plane rotor systems are susceptible to a self-induced vibration phenomenon called ground resonance. This dynamic instability results from lag motions of the rotor blades coupling with airframe degrees of freedom while the helicopter is in ground contact. As an addition to slope landing studies in the past and investigations of non-linear landing gear effects, this work focuses on a systematic study of partial skid contact using different landing gear modelling approaches and contact definitions. Special focus is given to different methods of contact simulation, using 3D spring-damper elements and polygonal contact elements. This paper is part of a larger study to investigate the influences of partial ground contact and soft terrain on helicopter dynamic stability during landings. It is the long-range objective to reduce the necessity of extensive flight tests prior to helicopter certification processes.

Item URL in elib:https://elib.dlr.de/139947/
Document Type:Article
Title:Influence of Contact Points of Helicopter Skid Landing Gears on Ground Resonance Stability
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lojewski, ReinhardReinhard.Lojewski (at) dlr.ehttps://orcid.org/0000-0003-1461-0371
Keßler, ChristophChristoph.Kessler (at) dlr.dehttps://orcid.org/0000-0003-1565-4712
Bartels, RainerRainer.Bartels (at) dlr.deUNSPECIFIED
Date:23 April 2020
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1007/s13272-020-00452-z
Publisher:Springer
ISSN:1869-5582
Status:Published
Keywords:ground resonance · ground contact · landing gear · instability
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: Lojewski, Reinhard
Deposited On:23 Dec 2020 09:09
Last Modified:15 Jul 2021 16:26

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