Related Experiment Video
Updated: May 3, 2026

09:35
Measurement of the Hand Transmitted Vibration of the Human Hand Arm System During Operation of a Hand Tractor
Published on: June 16, 2021
3.9K
The effects of vibration on workers
D Ramos1, L Schoenmann1, D Scott1
1Boston University, Boston, MA, USA.
Work (Reading, Mass.)
|January 21, 2014
Summary
Cumulative trauma disorders from vibration are increasing among workers. This review covers whole-body vibration, hand-arm vibration syndrome, and prevention strategies, including a case study.
Area of Science:
- Occupational Health
- Rehabilitation Medicine
- Ergonomics
Background:
- Workplace vibration exposure is a growing concern, leading to increased incidence of cumulative trauma disorders.
- Vibration effects manifest as either segmental (e.g., hand-arm vibration syndrome) or whole-body impacts.
- Millions of workers are affected annually by vibration-related health issues.
Purpose of the Study:
- To conduct a comprehensive literature review on whole-body vibration (WBV).
- To examine the prevalence and characteristics of hand-arm vibration syndrome (HAVS).
- To present evidence-based preventative strategies for vibration exposure in the workplace.
Main Methods:
- Systematic review of existing scientific literature.
- Analysis of studies focusing on WBV and HAVS.
- Synthesis of data on the efficacy of various preventative measures.
Main Results:
- Significant increase in cumulative trauma disorders linked to vibration over the last decade.
- Identification of key risk factors and exposure levels associated with WBV and HAVS.
- Evaluation of the effectiveness of different control measures in mitigating vibration risks.
Conclusions:
- Vibration exposure poses a substantial risk to worker health, necessitating targeted interventions.
- Effective preventative strategies are crucial for reducing the incidence and severity of vibration-induced disorders.
- A case study is provided to illustrate the practical application of reviewed information for therapists and employers.
Related Concept Videos
Vibrating Concrete
1.6K
Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
1.6K
Virtual Work for a System of Connected Rigid Bodies
858
Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
Next,...
858
Virtual Work
1.6K
The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
1.6K
Stress Concentrations in Circular Shafts
739
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
739
Muscle Stimulation Frequency
4.7K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
4.7K
Fatigue
1.1K
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
1.1K

