Results 51 to 60 of about 5,327,411 (195)
Effect of vibration exposure duration on discomfort [PDF]
, 2008 The comfort of a seated person exposed to vibration is known to depend on the magnitude, frequency content, and direction of the excitation. A review of the literature showed that very little is known about the effects of the duration of exposure to ...
Gallais, Cedric
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Nonlinear vibration isolators with asymmetric stiffness
, 2012 A vibration source is commonly coupled to a receiving structure by a vibration isolator. A key trade-off in the choice of vibration isolator is the requirement for a wide frequency range of isolation without excessive static deflection.
Abolfathi, A.
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Analysis of the effects of torsional impact tools on drill string stick–slip vibration
Energy Exploration & ExploitationTorsional impactor is widely used in deep and ultra-deep wells because it can suppress stick–slip vibration and increase ROP. As the direct factor affecting torsional impactor effect, it's working parameters study is still not sufficient.
Chaoyi She +5 more
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Analysis of Drill String Whirling Characteristics Based on Near-Bit Measurement Data
Shiyou jixieThe displacement signal of drill string vibration is difficult to be obtained in the actual drilling process. To further understand the vibration characteristics of drill string when whirling motion occurs in wellbore during drilling process， first， the ...
Zhang Tao +5 more
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Gong-kuang zidonghua, 2010 In order to solve the problem of low precision of handfeel detection in traditional vibration wave method for wire rope tension of mine hoister, the paper put forward a scheme that uses sensor in stead of handfeel to detect vibration period and selects ...
WANG Qin-xian +2 more
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Nihon Kikai Gakkai ronbunshu, 2017 In high-rise buildings, the elevator rope may resonate with the building's sway induced by wind forces and/or by long period ground motion. Therefore, suppression of elevator rope vibration is desired.
Takahiro FUJITANI, Hiroyuki KIMURA
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THE PERIODIC SYSTEM OF VIBRATIONS
This document introduces the “Periodic Table of Oscillations,” an ontological framework that organizes all physical, biological, and cognitive processes as manifestations of fundamental oscillatory principles. It proposes that oscillation is the primary structural and energetic pattern of existence, preceding geometry, matter, and biological evolution.
Thiele, Manfred, Thiele, Manfred
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Vibration as an exercise modality: how it may work, and what its potential might be [PDF]
, 2010 Whilst exposure to vibration is traditionally regarded as perilous, recent research has focussed on potential benefits. Here, the physical principles of forced oscillations are discussed in relation to vibration as an exercise modality.
Rittweger, Jörn, Jörn Rittweger
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Vibration-induced white finger in dockyard employees
, 1992 Vibration-induced white finger (VWF) is a vascular condition associated with occupational exposure to hand-transmitted vibration. The fingers are prone to intermittent blanching attacks which may be triggered by cold conditions and are usually ...
Nelson, Christopher Mark
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A miniature coupled bistable vibration energy harvester [PDF]
, 2014 This paper reports the design and test of a miniature coupled bistable vibration energy harvester. Operation of a bistable structure largely depends on vibration amplitude rather than frequency, which makes it very promising for wideband vibration energy
Zhu, Dibin +5 more
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