Experimental study on biodynamic response to vibration in human and animals

Area of Science:

• Biomechanics
• Human Factors Engineering
• Occupational Health

Background:

• Understanding human dynamic response to vibration is crucial for ergonomics and safety.
• Previous research has explored vibration effects, but detailed resonance characteristics across different axes and G levels require further investigation.

Purpose of the Study:

• To investigate the dynamic response characteristics of the human body to vibration across X, Y, and Z axes.
• To identify resonance frequencies and transmissibility curves in various body parts.
• To establish relationships between resonance frequency and human body parameters (height, weight) and vibration intensity.

Main Methods:

• Exposing 56 human subjects to controlled vibration stimuli on X, Y, and Z axes.
• Analyzing transmissibility curves to identify resonance peaks in different body parts.
• Utilizing a three-level artificial neural network to model the relationship between resonance frequency, anthropometric data, and vibration acceleration.

Main Results:

• Two primary resonance peaks were observed in most local body parts across subjects.
• Transmissibility curves showed consistent patterns among all participants.
• Resonance frequencies were found to decrease as the G level (intensity) of vibration increased.
• Similar characteristics were also observed in animal models.
• A predictive model relating resonance frequency to height, weight, and acceleration was developed using an artificial neural network.

Conclusions:

• The human body exhibits distinct resonance characteristics that are consistent across individuals and influenced by vibration intensity.
• These findings provide valuable data for the field of vibration ergonomics, potentially improving the design of protective measures and work environments.
• The established relationships can aid in predicting and mitigating the effects of vibration exposure.