Integrating Biodynamic Measurements in Frequency-Based Substructuring to Study Human-Structure Interaction
The mechanical behavior of the human body has long been characterized using biodynamic measurements on various human body parts in several positions and postures. Generally, these measurements are gathered as close as possible to the skin-mechanical structure interface for best results understanding how the body reacts when in contact with a vibrating structure. Substructuring methods have been widely used on mechanical structures to study and improve the dynamic behavior of complex assemblies. In the case of interactions between a human body and a vibrating structure, the dynamics involved in the structure alone is as important as the dynamics of the human body. Thus, the use of Frequency-Based Substructuring (FBS) to combine biodynamic measurements with the structure’s dynamic behavior is essential to understanding the vibration transmission phenomena in this complex assembly.
This article presents the advantages of this approach as well as the challenges when performing FBS between a mechanical structure and biodynamic measurements. The study focuses on a vibrating handlebar in conjunction with 3 different holding positions of the hand-arm system. The FBS assemblies are gathered and the results are compared with experimental measurements on the entire assembled structure for each position over a frequency range between 1 and 100 Hz.
KeywordsBiodynamics Substructuring Human-structure interaction Experimental measurements Structural dynamics
The authors gratefully acknowledge financial support from the National Science and Engineering Council of Canada (NSERC) and the participation of Cervélo and Vroomen – White Design.
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