Results 211 to 220 of about 42,195 (246)

Free Field Ground Vibration Due to Ground Improvement Induced Vibration

2021
The present study focused on measuring free-field vibration induced by ground improvement work. Ground improvement work at the Indian Institute of Technology Patna campus was performed using the vibroflotation technique. Two different types of sensors were used to measure this ground accelerations and peak particle velocity (PPV). The minimum source to
Pradipta Chakrabortty, Angshuman Das
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Acoustic ground vibration detector

The Journal of the Acoustical Society of America, 1990
In an acoustic ground vibration detector for the detection of infrasound ground vibrations, comprising at least one three-component geophone probe, the three individual geophones of said geophone probe are electrically connected in series and act upon an operation amplifier whose output signal activates a Reed relay.
Heinrich Baule, Manfred Borgers
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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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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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Ground Vibration Testing on Very Flexible Aircraft

AIAA Scitech 2020 Forum, 2020
As aircraft become more flexible in an effort to improve efficiency to reduce fuel consumption and operating costs and improve endurance, structural nonlinearities become more apparent. As a consequence, testing practices that are well established and mature for traditional, relatively rigid aircraft need to be re-examined.
Bilal Sharqi, Carlos E. S. Cesnik
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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 vibrations from passing trains

Journal of Sound and Vibration, 1979
Abstract As railway operating practice has evolved, so trains have become faster and also in the case of freight trains heavier, with increased axle loads. To carry this traffic, heavier track has been introduced and maintenance programmes intensified. This paper examines the residual problems of ground-borne vibration, the vehicle and track features
T.M. Dawn, C.G. Stanworth
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Ground vibrations near explosions

1949
Records are shown of the three components of ground vibration taken at distances out to 3284 meters following small explosions of dynamite about ten meters underground. The apparatus used to record this motion is described, and its limitations discussed.
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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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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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