Estimation of Biodynamic Forces Distributed on the Fingers and the Palm Exposed to Vibration

Dong, Ren G.; Welcome, Daniel E.; Wu, John Z.

doi:10.2486/indhealth.43.485

Cited by 21 publications

(28 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7). These findings are consistent with experimental studies that measure the frequency-dependent biodynamic responses of the fingers-hand to vibration 35) . These studies also predict that tissue stress and strain is absorbed locally by the soft tissues at the resonant frequency, and that the absorption of vibration by these tissues induces high levels of stress and strain.…”

Section: Animal Modelssupporting

confidence: 90%

Frequency-dependent Effects of Vibration on Physiological Systems: Experiments with Animals and other Human Surrogates

Krajnak

Riley

et al. 2012

Ind Health

Self Cite

View full text Add to dashboard Cite

Occupational exposure to vibration through the use of power- and pneumatic hand-tools results in cold-induced vasospasms, finger blanching, and alterations in sensorineural function. Collectively, these symptoms are referred to as hand-arm vibration syndrome (HAVS). Currently the International Standards Organization (ISO) standard ISO 5349-1 contains a frequency-weighting curve to help workers and employers predict the risk of developing HAVS with exposure to vibration of different frequencies. However, recent epidemiological and experimental evidence suggests that this curve under-represents the risk of injuries to the hands and fingers induced by exposure to vibration at higher frequencies (>100 Hz). To improve the curve, better exposure-response data need to be collected. The goal of this review is to summarize the results of animal and computational modeling studies that have examined the frequency-dependent effects of vibration, and discuss where additional research would be beneficial to fill these research gaps.

show abstract

Section: Animal Modelssupporting

confidence: 90%

Frequency-dependent Effects of Vibration on Physiological Systems: Experiments with Animals and other Human Surrogates

Krajnak

Riley

et al. 2012

Ind Health

Self Cite

View full text Add to dashboard Cite

show abstract

“…As the first degree of approximation, the vibration transmissibility may be used as a location-specific biodynamic frequency weighting (Thomas and Beauchamp, 1998; Dong et al, 2005b; Wu et al, 2010). The fundamental vibration frequencies of many tools such as chipping hammers, rock drills, and rivet hammers are in the range of 25–40 Hz (Griffin, 1997).…”

Section: Discussionmentioning

confidence: 99%

“…Although many studies on this subject have been reported, the syndrome's precise mechanisms remain unclear (ISO 5349-1, 2001). One of the essential foundations for further understanding their mechanisms is the biodynamic responses of the hand-arm system to vibration (Griffin, 1994; Dong et al, 2005a, b). Because the transmissibility on the human body is directly measurable, it can be used to represent the distributed features of the system responses, and it has a certain relationship with the driving-point response function (Dong et al, 2013), the examination of the vibration transmissibility has been used as one of the major approaches to quantify and understand the biodynamic responses.…”

Section: Introductionmentioning

confidence: 99%

An examination of the vibration transmissibility of the hand-arm system in three orthogonal directions

Welcome

Dong

et al. 2015

International Journal of Industrial Ergonomics

Self Cite

View full text Add to dashboard Cite

The objective of this study is to enhance the understanding of the vibration transmission in the hand-arm system in three orthogonal directions (X, Y, and Z). For the first time, the transmitted vibrations distributed on the entire hand-arm system exposed in the three orthogonal directions via a 3-D vibration test system were measured using a 3-D laser vibrometer. Seven adult male subjects participated in the experiment. This study confirms that the vibration transmissibility generally decreased with the increase in distance from the hand and it varied with the vibration direction. Specifically, to the upper arm and shoulder, only moderate vibration transmission was measured in the test frequency range (16 to 500 Hz), and virtually no transmission was measured in the frequency range higher than 50 Hz. The resonance vibration on the forearm was primarily in the range of 16–30 Hz with the peak amplitude of approximately 1.5 times of the input vibration amplitude. The major resonance on the dorsal surfaces of the hand and wrist occurred at around 30–40 Hz and, in the Y direction, with peak amplitude of more than 2.5 times of the input amplitude. At higher than 50 Hz, vibration transmission was effectively limited to the hand and fingers. A major finger resonance was observed at around 100 Hz in the X and Y directions and around 200 Hz in the Z direction. In the fingers, the resonance magnitude in the Z direction was generally the lowest, and the resonance magnitude in the Y direction was generally the highest with the resonance amplitude of 3 times the input vibration, which was similar to the transmissibility at the wrist and hand dorsum. The implications of the results are discussed. Relevance to industry Prolonged, intensive exposure to hand-transmitted vibration could result in hand-arm vibration syndrome. While the syndrome's precise mechanisms remain unclear, the characterization of the vibration transmissibility of the system in the three orthogonal dimensions performed in this study can help understand the syndrome and help develop improved frequency weightings for assessing the risk of the exposure for developing various components of the syndrome.

show abstract

“…Hence, the biodynamic force that can be measured at the interface may be used as an alternative vibration measure. Probably because it is very difficult to measure the biodynamic force at workplaces, few studies have seriously investigated it 23) . The current study used an indirect method to determine the biodynamic force 23) , and then used it to derive the frequency weighting.…”

Section: Vibration Measuresmentioning

confidence: 99%

“…The biodynamic force can be estimated from a biodynamic response parameter and the tool acceleration spectrum 23) . The biodynamic response parameters are conventionally defined as A group of 20 tool vibration spectra reported by Griffin 31) were used in the calculation of the rms values for the correlation analyses.…”

Section: Biodynamic Responsementioning

confidence: 99%

Frequency Weightings Based on Biodynamics of Fingers-Hand-Arm System

Dong

Welcome

2005

Ind Health

Self Cite

View full text Add to dashboard Cite

The frequency weighting for assessing hand-transmitted vibration exposure is critical to obtaining a true dose-response relationship. Any valid weighting must have a solid theoretical foundation. The objectives of this study are to examine the biodynamic foundation for assessing the vibration exposure and to develop a set of biodynamic methods to formulate the frequency weightings for different anatomical locations of the fingers-hand-arm system. The vibration transmissibility measured on the fingers, hand, wrist, elbow, shoulder, and head was used to define the transmitted acceleration-based (TAB) frequency weighting. The apparent masses measured at the fingers and the palm of the hand were used to construct the biodynamic force-based (BFB) weightings. These weightings were compared with the ISO weighting specified in ISO 5349-1 (2001). The results of this study suggest that the frequency weightings for the vibration-induced problems at different anatomical locations of the hand-arm system can be basically divided into three groups: (a) the weighting for the fingers and hand, (b) the weighting for the wrist, elbow, and shoulder, and (c) the weighting for the head. The ISO weighting is highly correlated with the weighting for the second group but not with the first and third groups. The TAB and BFB finger weightings are quite different at frequencies lower than 100 Hz, but they show similar trends at higher frequencies. Both TAB and BFB finger weightings at frequencies higher than 20 Hz are greater than the ISO weighting.

show abstract

Estimation of Biodynamic Forces Distributed on the Fingers and the Palm Exposed to Vibration

Cited by 21 publications

References 26 publications

Frequency-dependent Effects of Vibration on Physiological Systems: Experiments with Animals and other Human Surrogates

Frequency-dependent Effects of Vibration on Physiological Systems: Experiments with Animals and other Human Surrogates

An examination of the vibration transmissibility of the hand-arm system in three orthogonal directions

Frequency Weightings Based on Biodynamics of Fingers-Hand-Arm System

Contact Info

Product

Resources

About