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Author: Frederic M. Hoblit
Publisher: AIAA
ISBN: 9781600860607
Category : Airplanes
Languages : en
Pages : 332
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Book Description
Author: Frederic M. Hoblit
Publisher: AIAA
ISBN: 9781600860607
Category : Airplanes
Languages : en
Pages : 332
Get Book Here
Book Description
Author: Frederic M. Hoblit
Publisher: AIAA Education
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 328
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Book Description
This book provides an authoritative and practical presentation of the determination of gust loads on airplanes, especially continuous turbulence gust loads. The text emphasizes the basic concepts involved in gust load determination and enriches the material with discussion of important relationships, definitions of terminology and nomenclature, historical perspective, and explanations of relevant calculations. Coverage begins with discrete-gust idealization of the gust structure and moves to continuous-turbulence gust loads. Also considered are loads combination and design criteria, gust-response equations of motion, spanwise variation of vertical gust velocity, nonlinear systems, and analysis of gust-response flight-test data.
Author: Jan Robert Wright
Publisher: John Wiley & Sons
ISBN: 047085846X
Category : Technology & Engineering
Languages : en
Pages : 559
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Book Description
Aeroelastic phenomena arising from the interaction of aerodynamic, elastic and inertia forces, and the loads resulting from flight / ground manoeuvres and gust / turbulence encounters, have a significant influence upon aircraft design. The prediction of aircraft aeroelastic stability, response and loads requires application of a range of interrelated engineering disciplines. This new textbook introduces the foundations of aeroelasticity and loads for the flexible aircraft, providing an understanding of the main concepts involved and relating them to aircraft behaviour and industrial practice. This book includes the use of simplified mathematical models to demonstrate key aeroelastic and loads phenomena including flutter, divergence, control effectiveness and the response and loads resulting from flight / ground manoeuvres and gust / turbulence encounters. It provides an introduction to some up-to-date methodologies for aeroelastics and loads modelling. It lays emphasis on the strong link between aeroelasticity and loads. It also includes provision of MATLAB and SIMULINK programs for the simplified analyses. It offers an overview of typical industrial practice in meeting certification requirements.
Author: Walter G. Walker
Publisher:
ISBN:
Category : Acceleration (Mechanics)
Languages : en
Pages : 642
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Book Description
This paper presents the results of an analysis of approximately 100,000 hours of V-G data from one type of four-engine civil transport airplane to determine the magnitude and frequency of occurrence of the gust loads and gusts. The data were obtained during routine operations from 1947 to 1954 on five different routes. The normal accelerations for each of the five operations may be expected to exceed the value corresponding to the limit-gust-load-factor increment, on the average, twice (once positive and once negative) within the range of 5,000,000 to 22,300,000 flight miles. A derived gust velocity of 50 feet per second was exceeded twice within the range of 600,000 to 1,900,000 flight miles. The gust loads of the present operations were less than the loads experienced by other four-engine civil transports previously investigated, but the differences are not significant. The present data indicated only small differences due to seasonal effects and different operational utilization.
Author: Earle T. Binckley
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 28
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Book Description
Two jet-propelled airplanes were flow at different speeds in rough air to investigate the effects of compressibility on applied gust loads at Mach numbers up to 0.68. The results indicated that no compressibility correction to the slope of the lift curve was necessary.
Author: Robert T. Jones
Publisher:
ISBN:
Category :
Languages : en
Pages : 18
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Book Description
Author: Jens Rainier Maria Radok
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
Author: Ted L. Lomax
Publisher: AIAA
ISBN: 9781600861185
Category : Airframes
Languages : en
Pages : 306
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Book Description
Author: Lawrence Beatty Reynolds
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 74
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721937615
Category :
Languages : en
Pages : 256
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Book Description
This report presents the work performed by Lockheed Martin's Langley Program Office in support of NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program. The primary purpose of this work was to develop and demonstrate a gust analysis method which accounts for the span-wise variation of gust velocity. This is important because these unmanned aircraft having high aspect ratios and low wing loading are very flexible, and fly at low speeds. The main focus of the work was therefore to perform a two-dimensional Power Spectrum Density (PSD) analysis of the Alliance 1 Proof-of-Concept Unmanned Aircraft, As of this writing, none of the aircraft described in this report have been constructed. They are concepts represented by analytical models. The process first involved the development of suitable structural and aeroelastic Finite Element Models (FEM). This was followed by development of a one-dimensional PSD gust analysis, and then the two-dimensional (PSD) analysis of the Alliance 1. For further validation and comparison, two additional analyses were performed. A two-dimensional PSD gust analysis was performed on a simplet MSC/NASTRAN example problem. Finally a one-dimensional discrete gust analysis was performed on Alliance 1. This report describes this process, shows the relevant comparisons between analytical methods, and discusses the physical meanings of the results. Naser, A. S. and Pototzky, A. S. and Spain, C. V. Langley Research Center NAS1-96014; RTOP 710-10-11
