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Surrogate-model based Optimization Framework for the Structural Design of Helicopter Rotor Blades subject to Dynamics and Failure Criteria

Majeti, Rohin Kumar and Becker, Franziska (2023) Surrogate-model based Optimization Framework for the Structural Design of Helicopter Rotor Blades subject to Dynamics and Failure Criteria. In: 79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023. Vertical Flight Society. Vertical Flight Society Annual Forum 79, 2023-05-16, West Palm Beach, Florida, USA. doi: 10.4050/F-0079-2023-18007. ISBN 978-171387479-9.

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Official URL: https://vtol.org/annual-forum/forum-79-proceedings

Abstract

Helicopter rotor hub vibratory loads can be alleviated through careful design of the rotor blade inner structure. Large design space and the nonlinear nature of the problem are major obstacles that need to be overcome. Apart from that, the need for high-fidelity solutions lead to high computational times. An automated surrogate-model based design optimization process using commercially available software as well as codes developed within DLR has been described in this paper. Minimal human interference and overall process efficiency is the goal of this work. Latin Hypercube Sampling function for the design of experiments, Kriging function for surrogate modeling and particle swarm optimization algorithm make up the framework. The rotor blade inner structure parameters constitute the design variables while the natural frequencies and vibration index are taken as objective functions. Results show that through careful design of the inner structure, it is possible to obtain a rotor with lower hub vibratory loads. For the optimization process, it must be ensured that sufficient number of sampling points are taken for building accurate surrogate models and the problem definition should be neither under-constrained nor over-constrained.

Item URL in elib:https://elib.dlr.de/200582/
Document Type:Conference or Workshop Item (Speech)
Title:Surrogate-model based Optimization Framework for the Structural Design of Helicopter Rotor Blades subject to Dynamics and Failure Criteria
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Majeti, Rohin KumarUNSPECIFIEDhttps://orcid.org/0000-0003-0634-8051UNSPECIFIED
Becker, FranziskaUNSPECIFIEDhttps://orcid.org/0000-0002-9498-9563148460316
Date:May 2023
Journal or Publication Title:79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.4050/F-0079-2023-18007
Publisher:Vertical Flight Society
ISBN:978-171387479-9
Status:Published
Keywords:Rotor Blades, Structural Design, Surrogate model, Optimization
Event Title:Vertical Flight Society Annual Forum 79
Event Location:West Palm Beach, Florida, USA
Event Type:international Conference
Event Date:16 May 2023
Organizer:Vertical Flight Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Rotorcraft and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Institut für Systemleichtbau > Adaptronics
Deposited By: Majeti, Rohin Kumar
Deposited On:11 Dec 2023 07:40
Last Modified:24 Apr 2024 21:01

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