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Witte, J., Corominas, A., Ernst, B., Kaulbars, U., Wendlandt, R., Lindell, H. & Ochsmann, E. (2023). Acute physiological and functional effects of repetitive shocks on the hand–arm system: a pilot study on healthy subjects. International Journal of Occupational Safety and Ergonomics, 29(3), 1057-1066
Open this publication in new window or tab >>Acute physiological and functional effects of repetitive shocks on the hand–arm system: a pilot study on healthy subjects
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2023 (English)In: International Journal of Occupational Safety and Ergonomics, ISSN 1080-3548, E-ISSN 2376-9130, Vol. 29, no 3, p. 1057-1066Article in journal (Refereed) Published
Abstract [en]

Objectives. Exposure to hand-transmitted shocks is a widespread phenomenon in the workplace. Separate risk assessments for shocks do not exist in current international hand–arm vibration regulations, leading to potential underestimation of associated health risks. Methods. In a pilot study approach, eight healthy males were exposed to sets of 3 × 5 min of repetitive shocks and 1 × 5 min of random vibration, controlled at a weighted vibration total value of 10 m/s2. Baseline and post-exposure measurements of vibration perception thresholds, finger skin temperature, maximal grip/pinch force and the Purdue pegboard test were conducted. Muscle activity was monitored continuously by surface electromyography. Results. Shock exposures evoked a temporary increase of vibration perception thresholds with high examination frequencies. A decrease of skin temperature was hinted for shocks of 1 and 20 s–1. Electromyographical findings indicated an additional load on two forearm muscles during shock transmission. Maximum grip force and manual dexterity were not affected, and pinch force only partially reduced after the exposures. Conclusion. Physiological effects from shock exposure conform to those described for hand–arm vibration exposure in principle, although some divergence can be hypothesized. Randomized designs are required to conclusively assess the need of occupational health concepts specifically for hand-transmitted shocks.

Place, publisher, year, edition, pages
Taylor and Francis Ltd., 2023
Keywords
electromyography, hand strength, occupational health, pilot projects, skin temperature, touch, vibration
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:ri:diva-60190 (URN)10.1080/10803548.2022.2110358 (DOI)2-s2.0-85136787379 (Scopus ID)
Note

This research was commissioned and funded by the German Social Accident Insurance (grant number FP-415).

Available from: 2022-09-29 Created: 2022-09-29 Last updated: 2023-11-22Bibliographically approved
Lindell, H., Johannisson, P. & Gretarsson, S. (2023). Definition and Quantification of Shock/Peak/Transient Vibration. Paper presented at 15th International Conference on Hand-Arm Vibration. Proceedings (1), Article ID 6.
Open this publication in new window or tab >>Definition and Quantification of Shock/Peak/Transient Vibration
2023 (English)In: Proceedings, E-ISSN 2504-3900, no 1, article id 6Article in journal (Refereed) Published
Abstract [en]

Vibration injury in the hand–arm system from hand-held machines is one of the most common occupational health injuries. Machines emitting high-frequency shock vibrations, e.g., impact wrenches have since long been identified as a special risk factor. In legislative and standard texts, the terms shock, impact, peak and transient vibration are frequently used to underline the special risks associated with these kinds of vibrations. Despite this fact, in the literature there is not a mathematically stringent definition of either shock vibration or how the amplitude of the shock is defined. In this study, we suggest algorithms for definition and quantification of these terms and apply them to machine vibrations of various kinds.

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
high frequency; HAVS; VPM; VSI; VSL; transient; impact; shock; vibration; ultravibration
National Category
Applied Mechanics
Identifiers
urn:nbn:se:ri:diva-67020 (URN)10.3390/proceedings2023086029 (DOI)
Conference
15th International Conference on Hand-Arm Vibration
Note

AFA Insurance, #180109 and The Swedish Innovation board VINNOVA, #2020-04395.

Available from: 2023-09-21 Created: 2023-09-21 Last updated: 2023-09-21Bibliographically approved
Ottosson, P., Lindell, H. & Gretarsson, S. (2023). Fingertip Model for Analysis of High-Frequency Vibrations. Paper presented at 15th International Conference on Hand-Arm Vibration, Nancy, France, 6–9 June 2023.. Proceedings, 88(1), Article ID 6.
Open this publication in new window or tab >>Fingertip Model for Analysis of High-Frequency Vibrations
2023 (English)In: Proceedings, E-ISSN 2504-3900, Vol. 88, no 1, article id 6Article in journal (Refereed) Published
Abstract [en]

High-frequency shock-type vibrations (HFVs) from, e.g., impact wrenches with a frequency content mainly above 1250 Hz have long been suspected to cause a significant number of vibration injuries, HAVS. These vibrations are unregulated in the current standard for risk estimation, ISO 5349-1; thereby, the risk of injury is suspected to be underestimated. The objective of this study was to investigate the effects on finger tissue subjected to HFVs similar to those from impact wrenches by using a 2D finite element model of a fingertip. The model was validated through experiments. Using the input acceleration from the experiments, the model predicted high pressure variation and particular negative pressures at levels close to 0.1 MPa (1 Bar) or more, which are levels where cavitation in liquid can occur, with a detrimental effect on biological systems.

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
high-frequency vibration; ultravibration; HAVS; vibration injury; impact wrench; shock vibration; numerical model; experimental validation; negative pressures; material properties
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-67016 (URN)10.3390/proceedings2023086023 (DOI)
Conference
15th International Conference on Hand-Arm Vibration, Nancy, France, 6–9 June 2023.
Note

This research was funded by DGUV Forschungsförderung, FP-415

Available from: 2023-09-21 Created: 2023-09-21 Last updated: 2023-09-28Bibliographically approved
Gretarsson, S. & Lindell, H. (2023). High-Frequency Vibration from Hand-Held Impact Wrenches and Propagation into Finger Tissue. Paper presented at ICHAV 2023 15th International Conference on Hand-Arm Vibration. Proceedings, 86, 10, Article ID 1.
Open this publication in new window or tab >>High-Frequency Vibration from Hand-Held Impact Wrenches and Propagation into Finger Tissue
2023 (English)In: Proceedings, E-ISSN 2504-3900, Vol. 86, p. 10-, article id 1Article in journal (Refereed) Published
Abstract [en]

High-frequency shock-type vibration (HFV) with a frequency content mainly above 1250 Hz, e.g., from impact wrenches, is likely to cause a significant amount of vibration injuries and even hand-arm vibration syndrome. The objective of this study was to measure vibration up to 100 kHz with a Laser Doppler Vibrometer (LDV) and investigate the variation of vibration over the machine surface, the vibration propagation into finger tissue, and the vibration reduction on the finger tissue due to a foamed polymer layer. Our results showed that the vibration on the handle varies moderately and that the amplitudes are higher on the machine surface. A large proportion of the vibration is transferred into the finger tissue and thereby subjects the finger tissue to high-vibration amplitudes, but it is effectively reduced by a thin layer of foamed polymer.

Place, publisher, year, edition, pages
MDPI, 2023
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-67101 (URN)10.3390/proceedings2023086010 (DOI)
Conference
ICHAV 2023 15th International Conference on Hand-Arm Vibration
Available from: 2023-09-14 Created: 2023-09-14 Last updated: 2023-09-21Bibliographically approved
Lindell, H., Pitts, P., Brammer, A. & Lundström, R. (2023). Nancy Workshop 2023 on Hand-Transmitted Shock and High-Frequency Vibration. Paper presented at Proceedings of The 15th International Conference on Hand-Arm Vibration. Proceedings, 86(1), Article ID 47.
Open this publication in new window or tab >>Nancy Workshop 2023 on Hand-Transmitted Shock and High-Frequency Vibration
2023 (English)In: Proceedings, ISSN 2504-3900, Vol. 86, no 1, article id 47Article in journal (Refereed) Published
Abstract [en]

Since its initial publication in 1986, ISO 5439 has been unclear on the evaluation of isolated and repeated shock vibration. In 2015, an expert’s workshop was held in conjunction with the 13th International Conference that identified features of a vibration signal that may be important for predicting health outcomes, including high-frequency vibration and shock. Since then, ISO standards have been drafted on the measurement of shock and measurement of high-frequency vibrations, and in the European Union, a proposed revision of machinery supply legislation will require manufacturers to provide information on the average peak amplitude of acceleration. The Nancy Workshop introduced the issue of hand-transmitted (mechanical) shock (HTS) and work currently active within International Standards groups, and discussed options for defining HTS measurement. The workshop concluded that HTS is likely to present different risks to those of continuous hand–arm vibration, and that, therefore, there is a need for different metrics, and that high-frequency vibration is an important component of many HTS sources, e.g., impact wrenches, nail guns, riveting hammers, etc.; therefore, HTS evaluation should include higher frequencies of vibration, possibly up to 10 kHz.

National Category
Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-70551 (URN)10.3390/proceedings2023086047 (DOI)
Conference
Proceedings of The 15th International Conference on Hand-Arm Vibration
Note

This research received no external funding.

Available from: 2024-01-22 Created: 2024-01-22 Last updated: 2024-01-22Bibliographically approved
Lindell, H., Clemm, T. & Gretarsson, S. (2023). Vibration Reduction of Pneumatic Rock Drill for Rock Face Stabilisation Sector. Paper presented at 15th International Conference on Hand-Arm Vibration. Proceedings, 6, 33, Article ID 33.
Open this publication in new window or tab >>Vibration Reduction of Pneumatic Rock Drill for Rock Face Stabilisation Sector
2023 (English)In: Proceedings, E-ISSN 2504-3900, Vol. 6, p. 33-, article id 33Article in journal (Refereed) Published
Abstract [en]

Workers in the rock face stabilisation sector are exposed to high levels of vibration from pneumatic rock drills, which can lead to vibration injuries. The work situation is also ergonomically challenging since the work often is performed on steep cliffs with heavy equipment and a substantial degree of dust exposure. To reduce exposure to vibrations, the equipment has been redesigned, including the machine’s handle, feeding hoist and the implementation of a reciprocating mass generating a counter force to reduce the vibrations. As a side project, a dust removal device was also developed. It was shown that vibration and dust exposure can be substantially reduced.

Place, publisher, year, edition, pages
MDPI, 2023
National Category
Geotechnical Engineering
Identifiers
urn:nbn:se:ri:diva-67025 (URN)10.3390/proceedings2023086033 (DOI)
Conference
15th International Conference on Hand-Arm Vibration
Note

This research was funded by Statens arbeidsmiljøinstitutt (STAMI) as a part of IA-Bransjeprogrammet for bygg og anlegg.

Available from: 2023-09-21 Created: 2023-09-21 Last updated: 2023-09-21Bibliographically approved
Pitts, P. & Lindell, H. (2023). Workshop–ISO Development of Standards Relating to Hand-Transmitted Shock. Paper presented at Proceedings of The 15th International Conference on Hand-Arm Vibration. Proceedings, 86(1), Article ID 48.
Open this publication in new window or tab >>Workshop–ISO Development of Standards Relating to Hand-Transmitted Shock
2023 (English)In: Proceedings, ISSN 2504-3900, Vol. 86, no 1, article id 48Article in journal (Refereed) Published
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-70554 (URN)10.3390/proceedings2023086048 (DOI)
Conference
Proceedings of The 15th International Conference on Hand-Arm Vibration
Note

This research received no external funding.

Available from: 2024-01-22 Created: 2024-01-22 Last updated: 2024-01-22Bibliographically approved
Pettersson, C., Lindell, H. & Gretarsson, S. (2023). Zero Vibration Injuries—A Swedish Holistic Approach to Reduce Vibration Injury. Paper presented at 15th International Conference on Hand-Arm Vibration. Proceedings, 86, Article ID 25.
Open this publication in new window or tab >>Zero Vibration Injuries—A Swedish Holistic Approach to Reduce Vibration Injury
2023 (English)In: Proceedings, E-ISSN 2504-3900, Vol. 86, article id 25Article in journal (Refereed) Published
Abstract [en]

Vibration injuries cause significant costs for society, great personal suffering, and often the relocation of personnel within a company. The project “Zero Vibration Injuries” is a Swedish initiative with the objective of taking a holistic approach to the problem, involving all stakeholders. The project’s vision is “Zero Vibration Injuries”. This is achieved by addressing the source of the problem by reducing the vibration levels in hand-held machines and applying the solutions in industry to the benefit of the users.

Place, publisher, year, edition, pages
MDPI, 2023
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:ri:diva-67054 (URN)10.3390/proceedings2023086025 (DOI)
Conference
15th International Conference on Hand-Arm Vibration
Note

This research was funded by the Swedish Innovation Agency Vinnova, grant number 2021-01859.

Available from: 2023-09-15 Created: 2023-09-15 Last updated: 2023-09-21Bibliographically approved
Lindell, H. & Johannisson, P. (2021). Method for defining and quantifying shock vibration from hand-held machines. In: Proceedings of the 8th American Conference on Human Vibration: . Paper presented at 8th American Conference on Human Vibration. 2June 23-25, 2021;​ Online due to COVID-19.
Open this publication in new window or tab >>Method for defining and quantifying shock vibration from hand-held machines
2021 (English)In: Proceedings of the 8th American Conference on Human Vibration, 2021Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-60328 (URN)
Conference
8th American Conference on Human Vibration. 2June 23-25, 2021;​ Online due to COVID-19
Available from: 2022-10-12 Created: 2022-10-12 Last updated: 2023-05-17Bibliographically approved
Kaulbars, U., Haas, F., Ochsmann, E. & Lindell, H. (2020). Hand-arm-vibrationen durch einzelstöße im freizeitbereich als abgrenzung zum beruf – beispiel tennis: Hand-arm vibrations caused by isolated shocks in the leisure sector as a demarcation to the job – example tennis. In: VDI Berichte: . Paper presented at 8th VDI Symposium on Human Vibrations. Würzburg, Germany. 1 October 2020 through 2 October 2020. (pp. 95-104). VDI Verlag GMBH, 2370(2370)
Open this publication in new window or tab >>Hand-arm-vibrationen durch einzelstöße im freizeitbereich als abgrenzung zum beruf – beispiel tennis: Hand-arm vibrations caused by isolated shocks in the leisure sector as a demarcation to the job – example tennis
2020 (German)In: VDI Berichte, VDI Verlag GMBH , 2020, Vol. 2370, no 2370, p. 95-104Conference paper, Published paper (Refereed)
Abstract [en]

Hand-arm vibration caused by isolated shocks is familiar from the occupational sphere, for example during work with stud guns and pneumatic nail drivers or forging hammers. Whether the existing methods for the measurement and assessment of continuous vibration in accordance with EN ISO 5349-1 [1] are also adequate for measuring and assessing isolated shock exposures is the subject of an ongoing research project. In order for confounding effects from the leisure sphere (e.g. tennis, golf) to be excluded, the effects of shocks were measured. With reference to the example of tennis as a leisure activity, the procedure is presented, including the preliminary studies required for isolated impact measurement, for determining the measurement points and coupling and for the elimination of artefacts. The field measurements were conducted on experienced players (test persons) in the scenarios of "serve", "return forehand" and "return backhand". The unweighted ah, the band-limited acceleration ahF and the additional frequency weighting awp were evaluated in accordance with ISO/TR 18570 in addition to the usual measurement variable of the frequency-weighted acceleration ahw. An indicative risk assessment was performed based on the existing assessment method. A health risk presented by exposure in the leisure sphere alone cannot be excluded by assessment of a typical exposure scenario. 

Place, publisher, year, edition, pages
VDI Verlag GMBH, 2020
Keywords
Golf, Hand tools, Health risks, Leisure, Machine vibrations, Risk perception, Spheres, Tennis, Field measurement, Frequency-weighted acceleration, Frequency-weighting, Hand arm vibrations, Hand arms, Impact measurements, Leisure activities, Measurement points, Risk assessment
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-60324 (URN)2-s2.0-85105827754 (Scopus ID)9783180923673 (ISBN)9783180923697 (ISBN)9783180923703 (ISBN)9783180923734 (ISBN)9783180923741 (ISBN)9783180923758 (ISBN)9783180923765 (ISBN)
Conference
8th VDI Symposium on Human Vibrations. Würzburg, Germany. 1 October 2020 through 2 October 2020.
Available from: 2022-10-12 Created: 2022-10-12 Last updated: 2023-05-17Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5361-440x

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