Some important oversights in the assessment of whole-body vibration exposure based on ISO-2631-1

2012 ◽  
Vol 43 (1) ◽  
pp. 268-269 ◽  
Author(s):  
Ren G. Dong ◽  
Daniel E. Welcome ◽  
Thomas W. McDowell
Keyword(s):  
Whole Body Vibration ◽  
Whole Body ◽  
Vibration Exposure ◽  
Body Vibration ◽  
Iso 2631

Whole-body vibration exposure experienced by motorcycle riders – An evaluation according to ISO 2631-1 and ISO 2631-5 standards

2009 ◽  
Vol 39 (5) ◽  
pp. 708-718 ◽  
Author(s):  
Hsieh-Ching Chen ◽  
Wei-Chyuan Chen ◽  
Yung-Ping Liu ◽  
Chih-Yong Chen ◽  
Yi-Tsong Pan
Keyword(s):  
Whole Body Vibration ◽  
Whole Body ◽  
Vibration Exposure ◽  
Body Vibration ◽  
Iso 2631

scholarly journals WHOLE BODY AND HAND-ARM VIBRATIONS ON OFF-ROAD VEHICLE USED IN ACADEMICALS COMPETITIONS

2017 ◽  
Vol 24 (5) ◽  
pp. 375-382
Author(s):  
Fábio Celso Oliveira ◽  
Geice Paula Villibor ◽  
Joseph Kalil Khoury Junior ◽  
Éder Harisson Ferreira Lima
Keyword(s):  
Whole Body Vibration ◽  
Whole Body ◽  
Vibration Exposure ◽  
Military Operations ◽  
Road Vehicles ◽  
Body Vibration ◽  
Acceleration Level ◽  
Vertical Accelerations ◽  
Warning Limits ◽  
Iso 2631

Off-road vehicles, baja type, are designed for locomotion on irregular terrains with several obstacles, to pull loads with effciency, furthermore, are compact and easy to operate. Such vehicles have wide use in agriculture, construction, transportation and military operations. Baja vehicle provide to pilot an exposure to high levels of mechanical vibrations. With the present work aimed to determine the whole body vibration and hand-arm vibration in the pilot using the vehicle designed by UFVbaja team. The vibrations levels incident on the pilot was measured in three different terrain conditions and different forward speeds. It was determinate the root mean square acceleration and daily vibration exposure at the seat pad and hand-arm of pilot. For whole body vibration was obtained the daily vibration dose value. The values were confronted with standards ISO 2631-1. The acceleration level, normalized to 8 hour, exceeded the warning limits for all worked conditions. To Baja vehicle operating in plowing soil, the transverse and vertical accelerations exceeded the limit level. In general, incident acceleration levels on the pilot were considered high, which reinforces the need for seats projects of suspension, steering and seat that effectively reduce the vibration transmitted to pilot body and hand-arm system.

Influence of Speed in Whole Body Vibration Exposure in Heavy Equipment Mining Vehicles

2016 ◽  
Vol 60 (1) ◽  
pp. 919-922 ◽  
Author(s):  
Luz S. Marin ◽  
Andrés Rodriguez ◽  
Estefany Rey ◽  
Lope H. Barrero ◽  
Jack Dennerlein ◽  
...  
Keyword(s):  
Whole Body Vibration ◽  
Cross Sectional Study ◽  
Whole Body ◽  
Daily Maximum ◽  
Vibration Exposure ◽  
Cross Sectional ◽  
Body Vibration ◽  
Heavy Equipment ◽  
Vector Sum ◽  
Iso 2631

This study aimed to characterize and contrast the ISO 2631-1 daily average-continuous A(8) and cumulative-impulsive VDV(8) whole body vibration (WBV) exposures during the operation of mining heavy equipment vehicles (HEVs). In a cross-sectional study, WBV measurements were collected from six different types of HEVs. For each HEV, the daily A(8) and VDV(8) WBV exposures were determined for each axis (x, y and z) along with the vector sum (∑xyx).. The predominant axis of vibration exposure was related to and dependent on the type of HEV, which all have different average speeds. Most of the predominant axis WBV exposures were above the ISO daily vibration action limits and the vector sum-based WBV exposures were considerably higher. Our results indicated that mining HEV operators are exposed to high levels of both continuous and impulsive WBV exposures, with the impulsive WBV exposures being more restrictive with respect the HEVs daily maximum operation hours.

scholarly journals Particular aspects regarding the effects of whole body vibration exposure

2018 ◽  
Vol 148 ◽  
pp. 09005 ◽  
Author(s):  
Mihaela Picu ◽  
Laurentiu Picu
Keyword(s):  
Complex System ◽  
Human Performance ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Vibration Exposure ◽  
Vibration Level ◽  
Body Vibration ◽  
Vertical Vibrations ◽  
Iso 2631 ◽  
Whole Body Vibrations

This paper analyses the influence of whole-body vibrations on human performance; for this it was investigated how a group of men (20-29 years of age) and a group of woman (21–31 years of age) answered to specific requirements after being subjected to vertical vibrations under controlled laboratory conditions for 10-25 min. The vibrations were generated by a vibrant system with known amplitudes and frequencies. Accelerations were measured with NetdB - complex system for measuring and analysing human vibration and they were found in the range 0.4 - 3.1m/s2. The subjects’ performances were determined for each vibration level using specific tests. It can be concluded that exposure to vibrations higher than those recommended by ISO 2631 significantly disrupts how subjects responded to tests requirements.

Absorbed Power As an Indicator of Health Risk Associated With Whole-Body Vibration Exposure

2001 ◽  
Author(s):  
X. Y. Xie ◽  
R. B. Bhat ◽  
P.-E. Boileau
Keyword(s):  
Health Risk ◽  
Whole Body Vibration ◽  
The Body ◽  
Degree Of Freedom ◽  
Whole Body ◽  
Vibration Exposure ◽  
Body Vibration ◽  
Absorbed Power ◽  
Total Body ◽  
Iso 2631

Abstract The human body behaves like a vibrating physical system having mass, elastic and damping properties. In order to study the biodynamic behavior of the body, it is common practice to model the body as a lumped single or a multiple-degree-of-freedom (MDOF) system. Standards have been developed using the frequency-weighted root-mean-square (rms) acceleration input to the body as the primary measure of whole-body vibration exposure. In this paper, absorbed power during exposure to vertical whole-body vibration is considered as a potential indicator of the physical stress affecting comfort and health. A four-degree-of-freedom biodynamic model is chosen to represent the body and the absorbed power for the different body segments and the total body is computed. On the basis of the model and of the guidance provided in ISO 2631-1:1997 relating vibration exposure with health risk, computations are carried out to define a health guidance caution zone based on absorbed power.

scholarly journals The Study on Whole Body Vibration Exposure Induces Low Back Pain among UTHM Bus Drivers

2015 ◽  
Vol 773-774 ◽  
pp. 75-79
Author(s):  
Ahmad Fuad Mohd Noor ◽  
Musli Nizam Yahya ◽  
Mohd Imran Ghazali ◽  
Nor Azali Azmir ◽  
Hari Krishnan Tamil Selvan
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Vibration Exposure ◽  
Low Back ◽  
Bus Drivers ◽  
Limit Values ◽  
Body Vibration ◽  
Iso 2631

Buses are one of the important public transportation in Malaysia and commonly important for the student in any university. Thus, the study about Whole-Body Vibration (WBV) exposure induces to Low Back Pain (LBP) among the Universiti Tun Hussein Onn Malaysia (UTHM) was done. The objective was determine whether the bus drivers in UTHM would exceed the exposure action and limit values from the ISO 2631-1 (1997) during the working hours. Data collected according to different type of buses and evaluated the vibration significant different between buses based on the subjective correlation due to WBV questionnaire analysis. Analyze the prevalence of LBP based on the measurement and the questionnaire analysis. The study based on the international standard ISO 2631-1 (1997) which is related to the root-men-square (r.m.s) and Vibration Dose Value (VDV) parameter. The study covered among the bus drivers in UTHM. The measurement tools involved in the study is Larson Davis Vibration Meter (HVM 100) with Tri-axial Seat Pad Accelerometer to record data collection. The BLAZE software analyze the vibration exposure exceed the total vibration exposure according to 8 hours day A(8) value of 1.15 m/s2 and VDV value of 21.0 m/s1.75. The IBM Statistical Package for Social Science (SPSS) was used to do statistical analysis and testing involved was correlation, regression and ANOVA. Result obtained shows the A(8) and VDV was under EAV with highest value of 0.520 m/s2 and12.65 m/s1.75. The highest contribution factors by the duration to complete single trip per day (α=0.500).The further re-assess of working schedule need to be done in order to control the exposure level toward drivers. The assessment should be done for every two years.

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