نتایج جستجو برای: ground vibration
تعداد نتایج: 190880 فیلتر نتایج به سال:
Problem statement: One of the major environmental concerns related to blasting operation in mining and civil engineering projects is ground vibration. Approach: This study presented an assessment of ground vibrations caused by the blasting experiments at a marlstone quarry in northern Italy. The primary goal of this study was to determine the vibration level in order to protect dwelling area ad...
A ground vibration test can be used to obtain information about structural dynamics that is important for flutter analysis. Traditionally, this information— such as natural frequencies of modes—is used to update analytical models used to predict flutter speeds. The ground vibration test can also be used to obtain uncertainty models, such as natural frequencies and their associated variations, t...
This study based on free vibration analysis and study the behavior of framed structure under different frequency of vibration using ANSYS software and shaking table. A small scale uni-axial shaking table was prepared in laboratory, which can produce lower to moderate vibration, regarding frequency and velocity. Moment resisting framed structures constructed with connecting beam and column eleme...
Detailed measurements of vibration transmission from an underground rail line in Sydney and a line in a deep cutting in Perth have recently been conducted. The propagation characteristics of these two ground types are very different, and neither fits comfortably with standard theoretical models of vibration transmission through a uniform ground. In Sydney, the results can generally be modelled ...
Heat shock protein levels are increased in cells as a result of exposure to stress. To determine whether heat shock protein regulation could be used to evaluate stress in cells during spaceflight, the response of Jurkat cells to spaceflight and simulated space shuttle launch vibration was investigated by evaluating hsp70 and hsp27 gene expression. Gene expression was assessed by reverse transcr...
The aim of this study is to compare vibration exposure to noise exposure from railway traffic in terms of equal annoyance, i.e., to determine when a certain noise level is equally annoying as a corresponding vibration velocity. Based on questionnaire data from the Train Vibration and Noise Effects (TVANE) research project from residential areas exposed to railway noise and vibration, the dose r...
Using tunable far infrared laser absorption spectroscopy, 12 vibration-rotation-tunneling (VRT) subbands, consisting of approximately 230 transitions have been measured and analyzed for an 82.6 cm’ intermolecular vibration of the water dimer-d4 Each of the VRT subbands originate from Kg = 0 and terminate in either Ki = 0 or 1. These data provide a complete characterization of the tunneling dyna...
The long cane can be used as a mobility aid for visually handicapped people. According to a questionnaire completed by Japanese cane users, it seems they are not always satisfied with using long canes for a variety of reasons. In this study, hand-transmitted vibration from the long cane due to tapping the ground was measured because an exposure to repeated shock-type tapping vibration may affec...
The Shinkansen super-express railway system in Japan has greatly increased its capacity and has expanded nationwide. However, many inhabitants in areas along the railways have been disturbed by noise and ground vibration from the trains. Additionally, the Shinkansen railway emits a higher level of ground vibration than conventional railways at the same noise level. These findings imply that bui...
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