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Single Degree‐of‐Freedom Damped Vibration
Published in Haym Benaroya, Mark Nagurka, Seon Han, Mechanical Vibration, 2017
Haym Benaroya, Mark Nagurka, Seon Han
Vibration Exposure and Usability of Hand Tools.20 In powered hand tools, vibration can be conducted through the grasping surfaces to the user. The vibration characteristics of these tools depend strongly on the internal drive mechanisms. While the choice of mechanisms can be important to design integrity, it can be equally important to consider the usability of the tool. Research has shown that there is a relationship between the type and duration of vibration exposure and the risk of Hand‐Arm Vibration Syndrome (HAVS). Ergonomic factors of the tool, such as its weight, balance, size, and location of grasping surfaces, and body position during use, can also have an effect.
Noise and vibration
Published in Sue Reed, Dino Pisaniello, Geza Benke, Principles of Occupational Health & Hygiene, 2020
AS ISO 5439.1-2013 and AS ISO 5439.2-2013 (Standards Australia, 2013b, 2013c) do not provide limits for safe exposure to hand–arm vibration, but they do provide guidelines for its assessment. These standards suggest that the directions of vibrations be measured and reported using two orthogonal coordinate systems: the basicentre system and the biodynamic system. The basicentre system refers to the tool, while the biodynamic system refers to the hand.
Noise and vibration
Published in Sue Reed, Dino Pisaniello, Geza Benke, Kerrie Burton, Principles of Occupational Health & Hygiene, 2020
ISO Standard 5349 (ISO 2001) and AS 2763 (Standards Australia 1988) do not provide limits for safe exposure to hand-arm vibration, but they do provide guidelines for its assessment. These Standards suggest that the directions of vibrations be measured and reported using two orthogonal coordinate systems: the basicentre system and the biodynamic system. The basicentre system refers to the tool, and the biodynamic system refers to the hand.
Evaluation of the biodynamic response of the hand–arm system and hand-tool designs: a brief review
Published in International Journal of Occupational Safety and Ergonomics, 2023
Jain A. R. Tony B, M.S. Alphin
Nowadays, hand-operated and semi-automated equipment is widely used in the manufacturing industry, construction work, agriculture and medical applications. The interaction between the hand and the physical object in the physical environment is one of the key functions of the hand grasp. In this aspect, powered and non-powered hand tools are effectively used for different works. The exposure to vibration is transmitted from hand-operated tools to the hand by various tools such as grinders, drillers, jackhammers, etc. Hand-operated tools transmit a large magnitude of vibrations to the hand–arm system, which leads to discomfort and pain [1]. Vibration is a serious hazard to the safety of every one of us. The exposure of hand-operated tools to the hand causes hand–arm vibration. Hand–arm vibration is an occupational hazard which leads to occupational diseases such as Raynaud’s syndrome, and other disorders collectively known as hand–arm vibration syndrome (HAVS) [2]. Continuous usage of power tools over a long period causes HAVS, vibration white finger (VWF) and cumulative trauma disorders (CTDs) that lead to a combination of neurological, muscular, circulatory, bone and joint disorders [3–5]. HAVS is one of the most common occupational and long-term intractable diseases which affect millions of workers worldwide [6].
Effects of various handle shapes and surface profiles on the hand-arm responses and comfort during short-term exposure to handle vibration
Published in Journal of Occupational and Environmental Hygiene, 2022
Josefa Angelie Revilla, Ilham Priadythama, Ping Yeap Loh, Satoshi Muraki
Long-term exposure to hand-arm vibration (HAV) can lead to neurological, vascular, and musculoskeletal disorders, which manifest in the hands, fingers, elbows, and shoulders (Milosevic and McConville 2012; Krajnak et al. 2015). In addition to external stressors such as vibration, prolonged hard grip and awkward hand-arm posture were strongly linked to many upper extremity musculoskeletal disorders such as reduced grip strength and increased upper limb discomfort (DHHS, NIOSH 1997; Revilla et al. 2021). These issues primarily stimulated the need to prevent or limit handle vibration exposure. However, basic hand tools and equipment were continuously converted to mechanized ones to increase the productivity and efficiency of industrial and service firms. Consequently, these mechanized tools generate vibration, which can be transmitted to humans.
Variability of energy input into selected subsystems of the human–glove–tool system: a theoretical study
Published in International Journal of Occupational Safety and Ergonomics, 2018
Tomasz Hermann, Marian Witalis Dobry
It is now known that long-term exposure to local vibrations can result in the development of non-specific symptoms referred to as the hand–arm vibration syndrome (HAVS) or the vibration disease. In addition, taking into account the varied symptomatology of HAVS, it is possible to distinguish different forms: the vascular–nervous disorder, the musculoskeletal disorder and the mixed form [3,5,6].