Measurement of human-structure interaction in vertical and lateral directions: A standing body

This paper experimentally identifies human whole-body models in structural vibration for a standing body in vertical and lateral directions. A simple single degree-of-freedom system test rig is designed for the identification purpose. Seventy individuals attend the tests by standing on the test rig. An impact is applied on the test rig in the vertical and lateral directions when it is empty and when an individual stands on the rig. Both accelerations and displacements are recorded and the corresponding frequency spectra show the resonance frequencies of the bar rig and the rig with a standing person. It is observed consistently from the measurements that the human occupied test rig has a higher resonance frequency than that of the bare test rig in the vertical direction and that two resonance frequencies are measured from the occupied rig in the lateral directions. These observations clearly indicate that a standing body acts as at least a single degreeof-freedom system in both vertical and lateral directions. © (2006) by the Katholieke Universiteit Leuven Department of Mechanical Engineering All rights reserved.