Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"buffeting"”.
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Reduction of Helmet Buffeting in Open Cockpit, Single Seat Race Cars
… These forces, specifically the aerodynamic buffeting of the helmet, reach levels which are very fatiguing and distracting to the driver, and are therefore unacceptable. Little investigation has been done in this area, because normal wind tunnel tests do not isolate the helmet from the rest …
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Solvent induced NMR chemical shifts that arise from molecular encounters
… work concerns more detailed studies of the buffeting screening, which is governed by sterically controlled parameter (2T - T)2, where and are geometric structural parameters. The original approach is used to characterise the buffeting shifts induced by large solvent molecules and the …
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Polyatomic London Dispersion Forces and NMR Gas to Liquid Chemical Shifts
… reaction field approach coupled with the "buffeting" theory which accounts for the intimate effects of molecular encounters. In this thesis their overall approach is evaluated and compared with the theories of other workers that have been used to characterize NMR gas-to-solution chemical …
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Studies of the effects of molecular encounters on N.M.R. spin-lattice relaxation times
… assess whether a recently identified mechanism (buffeting), that influences n.m.r. chemical shifts, governs Tl also. A set of experimental conditions are presented that allow reliable measurements of Tl and the N. O. E. for 1H and 13C using both C. W. and F.T. n.m.r. spectroscopy. Literature data …
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Dynamic analysis and active control of two cable-stayed bridge
… system in bending and torsion, excited by both buffeting and self-excited loads. The existing suspension cables have been used as active tendons by which the control forces are applied to the bridge deck at the points of the anchorage. The control force from each suspension cable is actuated …
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Frequency-based response of damped outrigger systems for tall buildings
… for dynamic response due to wind effects such as buffeting and vortex shedding. By constructing an 80-dof discrete lumped mass model, and using a frequency-based response approach, two configurations of dampers, namely series and parallel damping are studied in detail. The effect of increasing …
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Wind effect on long span bridge
… wind load, such as vortex shedding, flutter and buffeting. Since all of these conditions have the chance to damage bridge structure, we calculate the particular wind speed and magnitude that will maximize the reaction. To check if the theory works well, a bridge model is set up and analyzed in …
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Modeling Vortex -Induced Vibration of Long -Span Bridges
… complementary to those existing for flutter and buffeting, which improves current techniques for the prediction of vortex-induced vibration of non-circular sections representative of bridge decks. Wind tunnel experiments of six spring-mounted rigid section models were performed in order to …
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The Stochastic Dynamics of an Array of Micron Scale Cantilevers in Viscous Fluid
… cantilever dynamics are due to the constant buffeting of fluid particles by Brownian motion and the dynamics of adjacent cantilevers are correlated due to long range effects of fluid dynamics. The measurement sensitivity of an experimental setup is limited by the magnitude of inherent …
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Studies of Sterically Controlled Solvent Induced NMR Chemical Shifts
… and it is suggested and demonstrated that the buffeting shifts may prove useful in elucidating features of molecular structure. More importantly, the present work provides strong experimental evidence for the separate existence of the three individual contributions to dispersion forces. In the …
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Experimental Investigation of Transonic Shock Oscillations on NACA 0018 at Incidence
A NACA 0018 airfoil model with a 3-inch chord was mounted into the trisonic wind tunnel at the National Center for Physical Acoustics at the University of Mississippi. Tunnel runs were conducted with the angle of incidence increasing from 0 degrees to 6 degrees at 1 degree increments, while the …