Advanced Methods of Structural and Trajectory Analysis for Transport Aircraft

Advanced Methods of Structural and Trajectory Analysis for Transport Aircraft
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
Total Pages: 114
Release: 2018-11-10
Genre: Science
ISBN: 9781731096968

This report summarizes the efforts in two areas: (1) development of advanced methods of structural weight estimation, and (2) development of advanced methods of trajectory optimization. The majority of the effort was spent in the structural weight area. A draft of 'Analytical Fuselage and Wing Weight Estimation of Transport Aircraft', resulting from this research, is included as an appendix. Ardema, Mark D. Unspecified Center AIRCRAFT DESIGN; ESTIMATING; STRUCTURAL WEIGHT; TRAJECTORY ANALYSIS; TRANSPORT AIRCRAFT; FUSELAGES; PREDICTION ANALYSIS TECHNIQUES; TRAJECTORY OPTIMIZATION; WING NACELLE CONFIGURATIONS...

Development of Advanced Methods of Structural and Trajectory Analysis for Transport Aircraft

Development of Advanced Methods of Structural and Trajectory Analysis for Transport Aircraft
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Total Pages: 94
Release: 2018-07-06
Genre:
ISBN: 9781722350604

In this report the author describes: (1) development of advanced methods of structural weight estimation, and (2) development of advanced methods of flight path optimization. A method of estimating the load-bearing fuselage weight and wing weight of transport aircraft based on fundamental structural principles has been developed. This method of weight estimation represents a compromise between the rapid assessment of component weight using empirical methods based on actual weights of existing aircraft and detailed, but time-consuming, analysis using the finite element method. The method was applied to eight existing subsonic transports for validation and correlation. Integration of the resulting computer program, PDCYL, has been made into the weights-calculating module of the AirCraft SYNThesis (ACSYNT) computer program. ACSYNT bas traditionally used only empirical weight estimation methods; PDCYL adds to ACSYNT a rapid, accurate means of assessing the fuselage and wing weights of unconventional aircraft. PDCYL also allows flexibility in the choice of structural concept, as well as a direct means of determining the impact of advanced materials on structural weight. Ardema, Mark D. Ames Research Center...

Advanced Aircraft Flight Performance

Advanced Aircraft Flight Performance
Author: Antonio Filippone
Publisher: Cambridge University Press
Total Pages: 665
Release: 2012-12-17
Genre: Mathematics
ISBN: 1107024005

This unique book deals with the aeroplane at several levels and aims to simulate its flight performance using computer software.

Introduction to Aircraft Structural Analysis

Introduction to Aircraft Structural Analysis
Author: T.H.G. Megson
Publisher: Butterworth-Heinemann
Total Pages: 725
Release: 2013-10-25
Genre: Technology & Engineering
ISBN: 0080982034

Introduction to Aircraft Structural Analysis, Second Edition, is an essential resource for learning aircraft structural analysis. Based on the author's best-selling text Aircraft Structures for Engineering Students, this brief book covers the basics of structural analysis as applied to aircraft structures.Coverage of elasticity, energy methods, and virtual work sets the stage for discussions of airworthiness/airframe loads and stress analysis of aircraft components. Numerous worked examples, illustrations, and sample problems show how to apply the concepts to realistic situations.This text is designed for undergraduate and postgraduate students of aerospace and aeronautical engineering as well as for professional development and training courses. Based on the author's best-selling text Aircraft Structures for Engineering Students, this introduction covers core concepts in about 200 fewer pages than the original by removing some optional topics like structural vibrations and aeroelasticity Systematic step-by-step procedures in the worked examples Self-contained, with complete derivations for key equations

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports
Author:
Publisher:
Total Pages: 456
Release: 1995
Genre: Aeronautics
ISBN:

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Structural Loads Analysis for Commercial Transport Aircraft

Structural Loads Analysis for Commercial Transport Aircraft
Author: Ted L. Lomax
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
Total Pages: 308
Release: 1996
Genre: Computers
ISBN:

This important text covers all aspects of structural loads analysis and provides some continuity between what was done on earlier airplane designs and what the current applications of the present regulations require.

Structural Analysis at Aircraft Conceptual Design Stage

Structural Analysis at Aircraft Conceptual Design Stage
Author: Reza Mansouri
Publisher:
Total Pages: 113
Release: 2014
Genre:
ISBN:

In the past 50 years, computers have helped by augmenting human efforts with tremendous pace. The aircraft industry is not an exception. Aircraft industry is more than ever dependent on computing because of a high level of complexity and the increasing need for excellence to survive a highly competitive marketplace. Designers choose computers to perform almost every analysis task. But while doing so, existing effective, accurate and easy to use classical analytical methods are often forgotten, which can be very useful especially in the early phases of the aircraft design where concept generation and evaluation demands physical visibility of design parameters to make decisions [39, 2004]. Structural analysis methods have been used by human beings since the very early civilization. Centuries before computers were invented; the pyramids were designed and constructed by Egyptians around 2000 B.C, the Parthenon was built by the Greeks, around 240 B.C, Dujiangyan was built by the Chinese. Persepolis, Hagia Sophia, Taj Mahal, Eifel tower are only few more examples of historical buildings, bridges and monuments that were constructed before we had any advancement made in computer aided engineering. Aircraft industry is no exception either. In the first half of the 20th century, engineers used classical method and designed civil transport aircraft such as Ford Tri Motor (1926), Lockheed Vega (1927), Lockheed 9 Orion (1931), Douglas DC-3 (1935), Douglas DC-4/C-54 Skymaster (1938), Boeing 307 (1938) and Boeing 314 Clipper (1939) and managed to become airborne without difficulty. Evidencing, while advanced numerical methods such as the finite element analysis is one of the most effective structural analysis methods; classical structural analysis methods can also be as useful especially during the early phase of a fixed wing aircraft design where major decisions are made and concept generation and evaluation demands physical visibility of design parameters to make decisions. Considering the strength and limitations of both methodologies, the question to be answered in this thesis is: How valuable and compatible are the classical analytical methods in today's conceptual design environment? And can these methods complement each other? To answer these questions, this thesis investigates the pros and cons of classical analytical structural analysis methods during the conceptual design stage through the following objectives: Illustrate structural design methodology of these methods within the framework of Aerospace Vehicle Design (AVD) lab's design lifecycle. Demonstrate the effectiveness of moment distribution method through four case studies. This will be done by considering and evaluating the strength and limitation of these methods. In order to objectively quantify the limitation and capabilities of the analytical method at the conceptual design stage, each case study becomes more complex than the one before.