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Showing 1 to 20 of 138 for “"fuselage"”.
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Design of monocoque fuselage
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1942.
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Optimal design of composite fuselage frames for crashworthiness
… to address the problem of designing composite fuselage frames for crashworthiness. A key feature of any optimization strategy for increasing structural crashworthiness is a progressive failure analysis. Currently, the most widely used analysis methods for progressive failure of composite …
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Optimum crashworthiness design of grid-stiffened composite fuselage structures
… preliminary design of grid-stiffened composite fuselage structures. The crash analysis of a fuselage structure was simplified through the development of a global-local procedure, which reduces the computational requirements of a crash simulation while facilitating the calculation of local …
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Rotor/Fuselage Unsteady Interactional Aerodynamics: A New Computational Model
A new unsteady rotor/fuselage interactional aerodynamics model has been developed. This model loosely couples a Generalized Dynamic Wake Theory (GDWT) to a Navier-Stokes solution procedure. This coupling is achieved using a newly developed unsteady pressure jump boundary condition in the …
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Detection of Fatigue Crack Growth in a Simulated Aircraft Fuselage
… neural network.</p> <p>In order to simulate a fuselage undergoing fatigue, a pressure vessel was constructed from a 0.040 inch thick 2024-T3 aluminum cylinder. The vessel contained a rivet line, a round hole with a notch filed in it to provide a stress concentration, and a repair patch and was …
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A coupled rotor-fuselage aeroelastic analysis using complex rotor modes
… dynamic interactions between the rotor and the fuselage. This is achieved via the use of complex rotor modes, which allows the effects of hub motion to be incorporated. The modal Lagrangian equation for a single rotating blade using real modes as state variables is first derived. The important …
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Impact Response and Failure of a Textile Composite Fuselage Frame
… the letter J, and are typical of the transverse fuselage frames found in a large transport aircraft. The material is a 2D triaxial braided composite of carbon fiber yarns. Impact speeds of the 91.6 lb drop mass are 23.7 ft/s or less. This speed range is the order of the vertical speed considered …
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Energy Absorption and Progressive Failure Response of Composite Fuselage Frames
Vertical drop testing of transport aircraft fuselage sections indicates that the frames play a major role in the process of absorbing the impact energy in the crushing of the substructure below the main passenger deck. Hence, static tests are performed on individual circumferential frames under a …
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Acoustic Emission Fatigue Crack Monitoring of a Simulated Aircraft Fuselage Structure
… to simulate the loads placed on an aircraft fuselage in flight. The AE signals were recorded by four resonant AE transducers. These were placed on the pressure vessel such that it was possible to determine the location of each AE signal. These signals were then classified using a Kohonen self …
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Computational Modal Analysis Of A Half-Scale Business Jet Fuselage Tail Section
… Element (FE) model of a half-scale business jet fuselage tail section that can then be used to predict the behaviour on a real aircraft based on certain excitations or changes to the structure, without having to conduct rigorous experimental testing. This is accomplished by comparing the FE model …
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Detection and characterization of impact damage in carbon fiber aircraft fuselage structure
… characterize damage in full-scale carbon fiber fuselage structure. It also examines embedded and bonded methods of deploying an in-situ fiber optic (FO) Swept Wavelength Interferometry (SWI) strain sensing system for damage detection. The hypothesis is that the more advanced scanning …
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Load transfer in the stiffener-to-skin joints of a pressurized fuselage
… crown panel typical of a large transport fuselage structure are used for two numerical examples. Although the inclusion of geometric nonlinearity reduces the "pillowing" of the shell, it 1s found that bending is localized to a narrow region near the stiffener. Including warping deformation …
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Geometric Trimming and Curvature Continuous Surface Blending for Aircraft Fuselage and Wing Shapes
… algorithm for surface blending of an aircraft fuselage shape and a wing shape at a closed trimming intersection curve, and verifies the properties of the newly created surface. In order to distinguish how well the new surface approximates the original, an error comparison tool developed in …
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A study of active control techniques for noise reduction in an aircraft fuselage model
… geometry on sound transmission into an aircraft fuselage model interior. For this study, a geometrically scaled cabin floor was installed in the unstiffened test cylinder to investigate the structural and acoustic influence of the simulated cabin floor. Results indicated that the stiffening of …
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Development of a Progressive Failure Finite Element Analysis For a Braided Composite Fuselage Frame
… are then implemented in a FEA of a circular fuselage frame of the same cross section and material for which test data was available. This circular frame test article had a nominal radius of 120 inches, a forty-eight degree included angle, and was subjected to a quasi-static, radially inward …
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Active control of interior noise using piezoelectric actuators in a large-scale composite fuselage model
… interior noise in a realistic composite aircraft fuselage is experimentally studied. The control inputs are due to piezoelectric actuators bonded to the cylinder wall while error information from the interior acoustic field is sensed by microphones. A preliminary analytical development was …
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Rule-based fuselage and spine and cross-section methods for computer aided design of aircraft components
… are needed. One such method, the Rule-Based Fuselage method, was suggested by Lockheed. The Rule-Based Fuselage method allows an aircraft designer to define complex aircraft fuselage geometry by specifying the fuselage profile and individual parametric cross-sections along the fuselage. This …
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The efficiency of the vertical tail for different wing-fuselage combinations, particularly at high angles of attack
Thesis: M.S., Massachusetts Institute of Technology, Department of Aeronautical Engineering, 1936
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Analysis of Path Loss from a Transmitter in an Aircraft Cabin to an Exterior Fuselage-Mounted Antenna
It is important to investigate the threat posed to commercial aircraft by on board electronic transmitters in the passenger cabin and the cargo holds of large transport aircraft. These transmitters may be in the form of unintentional use of portable electronic devices or even intentional radio …
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