Results 161 to 170 of about 54,658 (214)

Control Of Ground Vibrations

SPIE Proceedings, 1987
One of the basic problems when designing a new production facility or planning an expansion of a current facility, is the lack of a serious attempt to consider the detrimental effects of natural and/or induced ground vibrations. These unnoticed disturbances, which are always present, usually become apparent when the facility is completed and in active ...
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Propagation of ground vibration: A review

Journal of Sound and Vibration, 1976
A review of the current state of the art of ground vibration propagation is presented herein. First the theoretical models of vibration attenuation are reviewed and then measurement techniques are discussed. Finally, measurement and theory are combined into predictive models, whose validity is discussed.
T.G. Gutowski, C.L. Dym
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Ground Vibration Measurement

2010
Measurement of ground vibration is important for checking of amplitudes of predicted ground motion and for confirmation of efficiency of control measures of ground vibration. The properties of measuring instruments used can affect the results of measurements and therefore the user need to know how to select these properties in order to obtain correct ...
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Ground Vibration Studies

1983
Many attempts have been made to quantify the propagation and interaction of elastic waves. Woods [1], for example, examined the role of trenches in isolating a building from vibration. Dally and Lewis [2] studied the effects of a slit on a propagating Rayleigh wave through the use of dynamic photoelasticity.
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Instruments for Ground Vibration Testing

Aerospace Testing International, 2018
Proper selection of test equipment and setup are essential for consistent results
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The Helicopter in Free Ground Vibration

Aircraft Engineering and Aerospace Technology, 1952
A theoretical approach is presented with the object of determining the natural frequencies and hub characteristics of a single‐rotor helicopter in free ground vibration for use in the analysis of self‐excited mechanical oscillations of hinged rotor blades. The method is intended to obviate the experimental determination of these parameters, a technique
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The Frequency Content of Ground Vibration

Fragblast, 2004
A detailed examination of the frequency content of ground vibration is presented in terms of the so-called instantaneous frequency and time–frequency analysis. These techniques, and others, are applied to the surface vibration from a mass blast that triggered a large seismic event and to an earthquake vibration measured in the walls of a massive dam ...
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Ground Vibrations*

Bulletin of the Seismological Society of America, 1945
D. S. Carder, M. H. Gilmore
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Ground-transmitted vibrations

1991
Collection: Bulletin d'information : Comité Euro-International du ...
Klein, G. J., Rainer, J. H.
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Field Monitoring of TBM Vibration During Excavating Changing Stratum: Patterns and Ground Identification

Rock Mechanics and Rock Engineering, 2021
Meng-Bo Liu, Shaoming Liao
exaly