Landing Gear Integration in (194pages) Aircraft Conceptual Design.pdf

Landing Gear Integration
in
Aircraft Conceptual Design
by
Sonny T. Chai* and William H. Mason**
MAD 96-09-01
September 1996
(rev. March 1997)
Supported by NASA Ames Research Center
under
Grant NAG-2-919
an electronic version of this report is available at:
/aoe/faculty/Mason_f/
* current email address: Schai@
** ******@
Multidisciplinary Analysis and Design Center
for Advanced Vehicles
Virginia Polytechnic Institute and State University
Blacksburg, Virginia, 24061-0203
ii
Abstract
The design of the landing gear is one of the more fundamental aspects of aircraft
design. The design and integration process passes numerous engineering disciplines,
., structure, weights, runway design, and economics, and has e extremely
sophisticated in the last few decades. Although the design process is well-documented, no
attempt has been made until now in the development of a design methodology that can be
used within an automated environment. As a result, the process remains to be a key
responsibility for the configuration designer and is largely experience-based and
graphically-oriented. However, as industry and government try to incorporate
multidisciplinary design optimization (MDO) methods in the conceptual design phase, the
need for a more systematic procedure has e apparent.
The development of an MDO-capable design methodology as described in this work is
focused on providing the conceptual designer with tools to help automate the disciplinary
analyses, ., geometry, kinematics, flotation, and weight. Documented design procedures
and analyses were examined to determine their applicability, and to pliance with
current practices and regulations. Using the latest information as obtained from industry
during initial industry survey, the analyses were in terms modified and expanded to
modate the design criteria associated with the advanced large subsonic transports.
Algorithms were then developed based