vibration induced showed

  • Low frequency vibration induced streaming in a Hele-Shaw cell · Fichier PDF

    lower forcing frequency, they showed that large-scale flows could be generated within tanks of tens of centimeters size, ... Vibration-induced streaming is a mean flow that arises from Reynolds stresses under wave propagation15 and compressibility. That is, vibration-induced streaming is a second order effect that can be seen only at time scales greater than the period of the harmonic forcing ...

  • Effects of Vibration Therapy on Immobilization .Traduire cette page

    The induction of immobilization-induced hypersensitivity similar to that observed in previous studies was confirmed in all the immobilized rats. 3– 8 The Im+Vib1 group, which received vibration therapy throughout the immobilization period, showed a decrease in PWR to the 4- and 15-g von Frey filaments, demonstrating that vibration, when used as a primary prevention, inhibits immobilization ...

  • Vibration-induced neuropathy in the hand - CORETraduire cette page

    Morphologically, the dorsal interosseous nerve in vibration-exposed patients showed demyelination in various stages of development, endoneurial and perineurial fibrosis, and loss of axons. The results of this study underline the importance of the neurological component of vibration-induced injury. Subjectively experienced and objectively shown, it may severely interfere with hand function ...

  • Vibration‐induced ocular torsion and nystagmus .Traduire cette page

    Vibration‐induced nystagmus and head‐shaking nystagmus. In darkness, vibration to the mastoid bone or to the SCM muscle on either side induced nystagmus or significantly increased any spontaneous nystagmus in 14 of the 18 tested subjects. Passive head shaking also induced nystagmus in 10 of the 14 subjects with vibration‐induced nystagmus (Fig. 1, Table 3). The horizontal slow phase ...

  • Vibration-Induced Postural Posteffects | Journal of ...Traduire cette page

    Furthermore, Feldman and Latash (1982a) showed that kinesthetic illusions and vibration-induced reflex activity also can be reversed by auditory stimulation and that switching is dependent on the subject's attention, indicating involvement of both reflex and supraspinal pathways in mechanisms responsible for such transitions.

  • Vibration-induced injuries in workers exposed to .Traduire cette page

    17/06/2020 · Vibration exposure causes vasoconstriction in the arteries in hands and fingers, smooth muscle wall hypertrophy, periarterial fibrosis and damage to endothelial cells and receptors.

    Author : Lars Gerhardsson, Christina Ahlstrand, Per Ersson, Ewa Gustafsson
  • Vibration Induced Fatigue | Response DynamicsTraduire cette page

    Vibration induced fatigue, and fatigue failure, are dependent on a number of parameters that should all be considered at the start of an investigation into a fatigue issue. As vibration consultants, with expertise in structural dynamics, we are often asked to both asses fatigue risks in design, as well as analyze fatigue failure when it occurs. Stress level, number of cycles, geometry, and ...

  • Analyzing vibration in and around control valves | .Traduire cette page

    Flow-induced vibration (FIV) generates high levels of kinetic energy that can cause piping vibration, loosen piping supports and cause fatigue failure at piping branches (see Figure 2). Excessive vibration can damage a control valve's accessories, such as mounting brackets, actuator tubing, transmitters and actuators. Actuator tubing can suffer fatigue failures at or near the nut/ferrule ...

  • Vibration induced injuries in hands in long-term .Traduire cette page

    15/07/2019 · Long-term vibration exposure may cause neurophysiological disturbances such as numbness and tingling, reduced grip strength and difficulties in handling small objects. The dominant hand will usually have a higher vibration exposure than the non-dominant hand, which may cause more severe neurological symptoms and signs in the dominant hand. The study is based on 47 (36 males .

    Cited by : 1
  • FOOTBRIDGE DESIGN FOR PEDESTRIAN INDUCED VIBRATIONS · Fichier PDF

    to human-induced vibrations; causing discomfort to pedestrians and compromising the utility of the structure, even though the bridge is structurally sound and safe to cross. Design codes address this dynamic problem by providing limits for natural frequency and simplistic provisions to keep the footbridge experience pleasant. For slender, lightweight bridges, such as stress ribbon or cable ...

  • WHOLE-BODY-VIBRATION-INDUCED INCREASE IN LEG MUSCLE ... · Fichier PDF

    Levin, and V. Stijnen, Whole-body-vibration—induced increase in leg muscle activity during different squat exercises, J. Strength Cond. Res. 20(l):124-129. 2006,—This study analyzed leg mus-cle activity during whole-body vibration (WBV) training. Sub- jects performed standard unloaded isometric exercises on a vi-brating platform (Power Plate): high squat (HS), low squat (LS), and 1-legged ...

  • Effects of synchronised engine sound and vibration ...Traduire cette page

    12/05/2020 · The participants wore earphones, except in the vibration-only group, where they wore a noise cancelling headphone (QuietComfort 35, Bose, Inc., USA) to reduce possible sounds induced by vibration.

    Author : Yuki Sawada, Yoshihiro Itaguchi, Masami Hayashi, Kosuke Aigo, Takuya Miyagi, Masayuki Miki, Tetsuya ...
  • The effect of mechanical vibration on .Traduire cette page

    Our results were similar to those of Lau et al., 7 who showed that low-magnitude, high-frequency vibrations decrease RANKL expression with increased frequency, but they applied the mechanical vibrations to osteocytes rather than to the osteoblastic cell line. 7 Similarly, Dalla-Bona et al. 21 treated cementoblasts with high-intensity (150 mW/cm 2) and low-intensity (30 mW/cm 2) ultrasonic ...

  • Vibration‐induced ocular torsion and nystagmus .Traduire cette page

    Vibration‐induced nystagmus and head‐shaking nystagmus. In darkness, vibration to the mastoid bone or to the SCM muscle on either side induced nystagmus or significantly increased any spontaneous nystagmus in 14 of the 18 tested subjects. Passive head shaking also induced nystagmus in 10 of the 14 subjects with vibration‐induced nystagmus (Fig. 1, Table 3). The horizontal slow phase ...

  • Human Responses to Vibration Therapy · Fichier PDF

    induced vibrations are vertical. The purpose of this study is to ascertain the degree to which differences in the type of therapy applied to a patient affect the parameters that are important in stimulating increases in bone density through vibration therapy, and to determine how different subjects will respond to vibration therapy. A number of studies have been done to identify the most ...

  • Vibration-Induced Hearing Loss: Mechanical and ...Traduire cette page

    The exposure to vibration at higher frequencies (range, 500-1,000 Hz) produced stronger TS than did the exposure to lower frequencies (range, 32-250 Hz). The vibration-induced TS showed prominent recovery so that after 7 days, TS was 2.4 dB on average and 27 of 30 animals had recovered. After 14 days, the TS was 1.3 dB. The

  • Vibration Induced Fatigue | Response DynamicsTraduire cette page

    Vibration induced fatigue, and fatigue failure, are dependent on a number of parameters that should all be considered at the start of an investigation into a fatigue issue. As vibration consultants, with expertise in structural dynamics, we are often asked to both asses fatigue risks in design, as well as analyze fatigue failure when it occurs. Stress level, number of cycles, geometry, and ...

  • Evaluation of Acoustic- and Flow-Induced Vibration of the ... · Fichier PDF

    Evaluation of Acoustic- and Flow-Induced Vibration of the BWR Main Steam Lines and Dryer Ryo MORITA 1; 2, Shiro TAKAHASHI, Keita OKUYAMA2, Fumio INADA, Yukio OGAWA 3and Kazuhiro YOSHIKAWA 1Central Research Institute of Electric Power Industry, 2-11-1 Iwado Kita, Komae-shi, Tokyo 201-8511, Japan 2, Ltd. Energy & Environmental Systems Laboratory, 7-2-1 Omika-cho, .

  • Vibration‐induced ocular torsion and nystagmus .Traduire cette page

    Vibration‐induced nystagmus and head‐shaking nystagmus. In darkness, vibration to the mastoid bone or to the SCM muscle on either side induced nystagmus or significantly increased any spontaneous nystagmus in 14 of the 18 tested subjects. Passive head shaking also induced nystagmus in 10 of the 14 subjects with vibration‐induced nystagmus (Fig. 1, Table 3). The horizontal slow phase ...

  • Vibration fatigue - WikipediaTraduire cette page

    Vibration fatigue is a mechanical engineering term describing material fatigue, caused by forced vibration of random nature. An excited structure responds according to its natural-dynamics modes, which results in a dynamic stress load in the material points. The process of material fatigue is thus governed largely by the shape of the excitation profile and the response it produces.

  • Thermally Induced Vibration of an Internally .Traduire cette page

    The analysis showed that the natural frequency of the beam was more important than the heating rate in determining if vibrations will occur. Once initiated, the amplitude of the vibration increased until the amplitude was such that the heat removed by convection balanced the internal heating. The steady-state amplitude was not affected by the initial displacement of the beam. The convection ...

  • Vibration Analysis Explained | Reliable PlantTraduire cette page

    The initial assessment of the fan unit showed the unit to run normally when one fan was running, but once the second fan was turned on, vibration issues presented themselves at certain set points. Vibration analysis revealed that once fan No. 2 was turned on, a slight increase in vibration amplitude across all three points of measurement occurred, while fan No. 1 remained the same.

  • Prediction of low level vibration induced settlement · Fichier PDF

    of the vibration induced, in-situ settlement of sands. INTRODUCTION Vibrations from cyclic and dynamic loadings are important primarily due to their potential to cause damage to structures. In the urban environment, most attention is focused on vibrational effect on underground utilities and -story buildings and the problems associated with low-level, man-made vibrations such as those ...

  • A case report of vibration-induced hand .Traduire cette page

    However, there are indications that vibration-induced injuries could be more common in women [23–25]. Compared with men, women seem to develop injuries after a shorter period of vibration exposure. Bylund showed that women had a high prevalence of vascular, neurological, muscular and .

  • Adaptation of vibration-induced postural sway in ...Traduire cette page

    Postural reactions to soleus muscle vibration were explored in 8 PD patients, 8 healthy elderly, and 8 young adults. Postural sway was recorded using an electromagnetic motion analysis system in four conditions (2 vision×2 vibration) with four trials in each condition to test subjects' adaptation to the vibrator stimulus. The results showed that PD patients did adapt to the vibration across ...

  • Spiral: Vortex-induced vibration of a wavy elliptic .Traduire cette page

    Vortex-induced vibration (VIV) of a wavy elliptic cylinder is investigated by mean of experiments in a water channel in the range of Reynold number between 1,500 to 15,000. Results are compared with those for a plain circular cylinder of equivalent diameter with a combined mass–damping parameter of 0.018. Curves of displacement and frequency of vibration showed that the hydroelastic ...

  • Vibration-induced neuropathy in the hand - Lund .Traduire cette page

    Morphologically, the dorsal interosseous nerve in vibration-exposed patients showed demyelination in various stages of development, endoneurial and perineurial fibrosis, and loss of axons. The results of this study underline the importance of the neurological component of vibration-induced injury. Subjectively experienced and objectively shown, it may severely interfere with hand function ...

  • Investigation of vibration induced by moving .Traduire cette page

    Some papers studied the platform improvement to reduce vibration for high-tech buildings. 6 –15 Yang and Xu 6 studied an active platform to keep high tech equipment free from micro-vibration induced by traffic disturbance, where a platform was installed on a building floor through an active control actuator and a passive mount to stop floor vibration to transfer to the platform.

  • Flow-induced vibration (Book) | OSTI.GOVTraduire cette page

    Flow-induced vibration is a term to denote those phenomena associated with the response of structures placed in or conveying fluid flow. More specifically, the terra covers those cases in which an interaction develops between fluid-dynamic forces and the inertia, damping or elastic forces in the structures. The study of these phenomena draws on three disciplines: (1) structural mechanics, (2 ...

  • Research on the influence of the normal vibration on the ... · Fichier PDF

    R ESEARCH ON THE INFLUENCE OF THE NORMAL VIBRATION ON THE FRICTION-INDUCED VIBRATION OF THE WATER-LUBRICATED STERN BEARING. Y ONG JIN, T IANYANG D ENG, Z HENGLIN L IU, JIANHUI Z HOU ISSN P RINT 1392-8716, ISSN O NLINE 2538-8460, K AUNAS, L ITHUANIA 763 the singing sound also came. The singing sound test of water-lubricated rubber stern bearing, conducted by Y Z TIAN, et al. [7], showed .

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