Development, correlation and updating of a finite element model of the OH-6A helicopter.
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Authors
Pampalone, Michael R.
Subjects
Helicopter
OH-6A
Vibration Analysis
Finite Element Modeling
Modal Analysis
Natural Frequencies
Mode Shapes
NASTRAN
Sensitivity Analysis
Modal Assurance Criterion
MAC
OH-6A
Vibration Analysis
Finite Element Modeling
Modal Analysis
Natural Frequencies
Mode Shapes
NASTRAN
Sensitivity Analysis
Modal Assurance Criterion
MAC
Advisors
Gordis, Joshua H.
Date of Issue
1996-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
This thesis is part of the helicopter research program established at The Naval Postgraduate School (NPS). NPS currently has two OH-6A light observation helicopters which were obtained from the U.S. Army. One of these is dedicated to ground vibration testing and dynamics research. Previous research on the OH-6A at NPS established baseline vibration test data. The data includes natural frequencies, principal mode shapes and damping characteristics. This thesis continues previous research of the OH-6A and develops a detailed finite element model to be used in future helicopter dynamics research at NPS. The model is based on an MSC/NASTRAN finite element model of a similar aircraft obtained from the McDonnell Douglas Helicopter Company. Both the nose and empennage were modified to represent the structural characteristics of the test article. Due to lack of structural design data, model mass updating was performed using previously obtained test data and a design sensitivity approach. The updated model natural frequencies agree well with the test data
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funding
Format
x, 100 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.