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.
Results
Showing 1 to 20 of 31 for “"Vibration Tests"”.
-
Development of an inexpensive test system and evaluation of the test procedures for conducting vibration tests on antivibration gloves per Iso Standard 10819
… test system was developed for conducting vibration tests on vibration attenuating gloves using ISO Standard 10819: Mechanical Vibration and Shock--Hand-Arm Vibration--Method for the Measurement and Evaluation of the Vibration Transmissibility of Gloves at the Palm of the Hand. A small …
-
Testing of the suspended vehicle system scale model
… deflections and an accelerometer to detect vibrational frequencies. The output of ten LVDTs was recorded on either a Sanborn strip chart recorder or a magnetic type recorder. The accelerometer supplied a signal to a real-time frequency analyzer. The testing program consisted of both static …
-
Strain-deflection relationships of freely vibrating wood beams
… housing have recently become concerned about the vibrational behavior of residential floors. This concern resulted in a need for methods of sensing floor vibrations. Some investigators have sensed floor vibrations with electric resistance strain gauges bonded to the underside of the floor joists. …
-
Vibration test and parametric study of concrete flooring system towards human comfort
… years, there has been an increase in floor vibration problems of structures such as residential and commercial buildings. Vibration is defined as one of the serviceability issues related to the human comfort. Human activities is the one of the factor vibration in buildings and vibrations …
-
Estudo do comportamento dinâmico de plataforma offshore do tipo T.L.P. para águas profundas através de modelo reduzido hidroelástico
… techniques. The obtained results from free vibration tests and the action of regular waves on the model are also shown. Among the available experimental results, those related to the damping ratio, inertia and drag coefficients should be highlited. It should be noted for the model under wave …
-
Manufacture and rehabilitation of guardrail posts using composite fabrics
… to determine their natural frequencies. Free vibration tests of unwrapped, GFRP wrapped, and damaged posts were performed to establish amplitude decay for damping characteristics. (Abstract shortened by UMI.).
-
An investigation of the response of a 1/5-scale model of the Titan III launch vehicle to longitudinal excitation
… resonant frequencies and mode shapes from vibration tests with a 1/5-scale model of the Titan III-A launch vehicle are presented, Measurements of longitudinally excited vibration modes of the model structure supported in a suspension system offering negligible restraint to longitudinal …
-
Digital frequency demodulation for a laser vibrometer
… to handle the special case of sine-dwell vibration tests is presented.
-
Experimental and Computational Analysis of a 3D Printed Wing Structure
… the wing is validated against static deformation tests as well as dynamic Ground Vibration Tests (GVT). The developed model is compared against the commercial software Nastran/Patran. Further plans include experimental aerodynamic test of 3D printed wing in the new Embry-Riddle Aeronautical …
-
Damage detection in structures using frequency response function (FRF) data and finite element modelling
… (FRF) data obtained from non-destructive vibration tests. The method is used to study cases of early structural damage in which there is no appreciable change in mass and damping. The resulting change in structural stiffness matrix is reflected in changes of FRF which can be exemplified by …
-
Dynamic modelling of arch dams in the ambient state
… Elsberg concrete-arch dam. Thereafter, ambient vibration tests were conducted on the Roode Elsberg dam to measure its dynamic properties and validate the finite element models. The excitation on the dam was provided by the wind and the reservoir flowing over the spillway. Vibrations of the dam …
-
Design Methodology for the Utilisation of A Structural Orthotropic Composite Materials by Micro-Enterprises
… study are established through correlation to vibration tests and then verified through ultrasonic testing techniques and these are then fed into the numerical techniques used subsequently in the case study presented. Numerical techniques show how a product should be manufactured so that it has …
-
The steady-state and dynamic performance of gas lubricated uniform film porous thrust bearings
… The experimental results for the forced vibration tests are presented as dimensionless performance character istics as represented by dynamic spring force and damping force and it is found that the simple linear model breaks down for large amplitudes of vibration.
-
Evaluation of ceramic candle filters degradation and damage location using four-point bending tests
… confirm the dynamic response analysis, bending tests were performed to estimate the Young's modulus from the load-deflection curve and compared the results with the predicted values from vibration analysis. Four-point bending tests were conducted on seven intact filters, which included five used …
-
Dynamic analysis of magnetorheological elastomer configured sandwich structures
… scale structures. Comprehensive experimental tests have been carried out in order to gain knowledge and data on the dynamic shear properties and behaviour of stiffness change of MRE and MRE cored adaptive sandwich beam structures depending on magnetic fields. Dynamic shear property tests with …
-
Damage identification of unreinforced masonry structures based on vibration response
… techniques to non-slender URM buildings. Modal tests were conducted on two undamaged URM panels and an undamaged model of a one-storey URM house. Impacts with a calibrated hammer were used to excite the specimens during the modal test, and also horizontal harmonic excitations in the case of the …
-
Stability enhancement of a transonic wing using a passive nonlinear energy sink
… series of experimental and computational ground vibration tests of the wing were performed. They showed that the NES has a profound effect on the second bending mode of the wing, even for small wingtip oscillations. This is a strong indication that the prototype NES will be effective in …
-
Effects of Bottom Chord Extensions on the Static and Dynamic Performance of Steel Joist Supported Floors
… of bottom chord extensions on deflections and vibration characteristics of joist supported floor systems when joist bottom chord extensions are installed. To understand the effect of bottom chord extensions on deflections, natural frequency, damping, mode shape and effective mass, extensive …
-
Predictive Simulations of the Impedance-Matched Multi-Axis Test Method Using Data-Driven Modeling
… For example, satel- lites are subjected to large vibration and acoustic loads when transported into orbit and need to be certified with tests that are representative of the anticipated loads. However, tra- ditional certification testing specifications can consist of sequential uniaxial vibration …
-
Determination of the complex modulus of a solid propellant and random vibration analysis of the layered viscoelastic cylinders with finite element method
… sophisticated systems often subjected to random vibration environment. Thus, in various design, development, and production stages, laboratory random vibration testing of sampled solid rocket motors on electromagnetic or hydraulic shakers are routinely performed as an important …
Page 1 of 2