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Publications (10 of 11) Show all publications
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., 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
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
Zimmerman, J. J., Bain, J. L., Wu, C., Lindell, H., Gretarsson, S. & Riley, D. A. (2020). Riveting hammer vibration damages mechanosensory nerve endings. Paper presented at 7th American Conference on Human Vibration, Seattle, WA on June 13, 2018. Journal of the peripheral nervous system, 25(3), 279-287
Open this publication in new window or tab >>Riveting hammer vibration damages mechanosensory nerve endings
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2020 (English)In: Journal of the peripheral nervous system, ISSN 1085-9489, E-ISSN 1529-8027, Vol. 25, no 3, p. 279-287Article in journal (Refereed) Published
Abstract [en]

Background and Aims Hand-arm vibration syndrome (HAVS) is an irreversible neurodegenerative, vasospastic and musculoskeletal occupational disease of workers using powered hand tools. The etiology is poorly understood. Neurological symptoms include numbness, tingling and pain. This study examines impact hammer vibration-induced injury and recoverability of hair mechanosensory innervation. Methods Rat tails were vibrated 12?min/d for 5 wk followed by 5 wk recovery with synchronous non-vibrated controls. Nerve fibers were PGP9.5 immunostained. Lanceolate complex innervation was compared quantitatively in vibrated vs sham. Vibration peak acceleration magnitudes were characterized by frequency power spectral analysis. Results Average magnitude (2515?m/s2, rms) in kHz frequencies was 109 times that (23?m/s2) in low Hz. Percentage of hairs innervated by lanceolate complexes was 69.1% in 5wk sham and 53.4% in 5wk vib generating a denervation difference of 15.7% higher in vibration. Hair innervation was 76.9% in 5wk recovery sham and 62.0% in 5wk recovery vibration producing a denervation difference 14.9% higher in recovery vibration. Lanceolate number per complex (18.4?±?0.2) after vibration remained near sham (19.3?±?0.3), but 44.9% of lanceolate complexes were abnormal in 5 wk vibrated compared to 18.8% in sham. Interpretation The largest vibration energies are peak kHz accelerations (~?100?000?m/s2) from shock waves. The existing ISO 5349-1 standard excludes kHz vibrations, seriously underestimating vibration injury risk. The present study validates the rat-tail, impact hammer vibration as a model for investigating irreversible nerve damage. Persistence of higher denervation difference after 5-week recovery suggests repeated vibration injury destroys the capability of lanceolate nerve endings to regenerate. 

Place, publisher, year, edition, pages
John Wiley & Sons, Ltd, 2020
Keywords
denervation, mechanosensory, neurodegeneration, PGP9.5, shock wave, vibration disease
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-45035 (URN)10.1111/jns.12393 (DOI)
Conference
7th American Conference on Human Vibration, Seattle, WA on June 13, 2018
Available from: 2020-05-28 Created: 2020-05-28 Last updated: 2023-09-21Bibliographically approved
Zimmerman, J., Bain, J., Wu, C., Lindell, H., Gretarsson, S. & Riley, D. (2018). Five Week Riveting Hammer Vibration: Rat Tail Sensory Nerves. In: Peter W. Johnson (Ed.), Proceedings of the 7th American Conference on Human Vibration 2018: . Paper presented at 7th American Conference on Human Vibration 2018 (pp. 20-21).
Open this publication in new window or tab >>Five Week Riveting Hammer Vibration: Rat Tail Sensory Nerves
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2018 (English)In: Proceedings of the 7th American Conference on Human Vibration 2018 / [ed] Peter W. Johnson, 2018, p. 20-21Conference paper, Published paper (Other academic)
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-35546 (URN)
Conference
7th American Conference on Human Vibration 2018
Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2023-09-21Bibliographically approved
Gretarsson, S. & Lindell, H. (2018). Nonlinear Tuned Vibration Absorber on Reciprocating Tools. In: Peter W. Johnson (Ed.), Proceedings of the 7th American Conference on Human Vibration 2018: . Paper presented at 7th American Conference on Human Vibration 2018, Seattle, June 13-15 (pp. 27-28).
Open this publication in new window or tab >>Nonlinear Tuned Vibration Absorber on Reciprocating Tools
2018 (English)In: Proceedings of the 7th American Conference on Human Vibration 2018 / [ed] Peter W. Johnson, 2018, p. 27-28Conference paper, Published paper (Other academic)
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-35548 (URN)
Conference
7th American Conference on Human Vibration 2018, Seattle, June 13-15
Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2023-09-21Bibliographically approved
Troell, E., Lindell, H. & Gretarsson, S. (2018). Zero Vibration Injuries: Achieved by Machine Redesign. In: Peter W. Johnson (Ed.), Proceedings of the 7thAmerican Conference on Human Vibration 2018: . Paper presented at 7thAmerican Conference on Human Vibration 2018, Seattle, June 13-15 (pp. 7-8).
Open this publication in new window or tab >>Zero Vibration Injuries: Achieved by Machine Redesign
2018 (English)In: Proceedings of the 7thAmerican Conference on Human Vibration 2018 / [ed] Peter W. Johnson, 2018, p. 7-8Conference paper, Published paper (Other academic)
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-35543 (URN)
Conference
7thAmerican Conference on Human Vibration 2018, Seattle, June 13-15
Projects
Noll vibrationsskador steg 3
Funder
Vinnova
Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2023-09-21Bibliographically approved
Lindell, H., Gretarsson, S. & Machems, M. (2017). High frequency shock vibrations and implications of ISO 5349 – Measurement of vibration, simulating pressure propagation, risk assessment and preventive measures.
Open this publication in new window or tab >>High frequency shock vibrations and implications of ISO 5349 – Measurement of vibration, simulating pressure propagation, risk assessment and preventive measures
2017 (English)Report (Other academic)
Series
IFA Report 5/2017e: Hand-arm vibration: Exposure toisolated and repeated shock vibrations –Review of the International Expert Workshop 2015 in Beijing, ISSN 2190-7994
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-60330 (URN)978-3-86423-198-8 (ISBN)
Available from: 2022-10-12 Created: 2022-10-12 Last updated: 2023-09-21Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0009-0008-8340-0638

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