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Investigation of Load Collectives on Transport Aircraft Using Continuous Turbulence for Fatigue Analysis Purposes

Handojo, Vega (2020) Investigation of Load Collectives on Transport Aircraft Using Continuous Turbulence for Fatigue Analysis Purposes. AEC2020 - Aerospace Europe Conference, 25.-28. Feb. 2020, Bordeaux, Frankreich.

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Abstract

This paper elaborates a numerical method to derive load spectra of aircraft wings due to continuous turbulence. This method can serve as a part of an aircraft fatigue analysis in early design stages. For that aim, reference flight missions including the payload and fuel masses are defined. For each flight phase, stress transfer functions of the observed positions on the wing are derived, and a normalized von Karman turbulence spectrum is generated. Subsequently, stress responses resulting from the transfer functions and the turbulence spectra are calculated, and the occurrence distributions are derived using a rainflow-counting algorithm. Furthermore, probability distributions of turbulence intensities are generated to obtain the expected load spectra of the observed positions in one flight. These can be extrapolated to represent e.g. an aircraft's service life of 40000 flights. This method is demonstrated using a mid-range aircraft configuration and compared with the TWIST (Transport Wing Standard Load programme) spectrum, which is commonly taken as reference in fatigue analysis in aircraft pre-design. Moreover, several parameter variations are conducted to investigate the sensitivities of the proposed method.

Item URL in elib:https://elib.dlr.de/139566/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of Load Collectives on Transport Aircraft Using Continuous Turbulence for Fatigue Analysis Purposes
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Handojo, VegaVega.Handojo (at) dlr.deUNSPECIFIED
Date:2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:loads analysis, load collectives, continuous turbulence, fatigue analysis
Event Title:AEC2020 - Aerospace Europe Conference
Event Location:Bordeaux, Frankreich
Event Type:international Conference
Event Dates:25.-28. Feb. 2020
Organizer:3AF - Association Aéronautique Astronautique de France
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Loads Analysis and Aeroelastic Design
Deposited By: Handojo, Vega
Deposited On:18 Dec 2020 16:42
Last Modified:18 Dec 2020 16:42

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