Some considerations on higher components of human walking lateral force measured by using FFT power spectrum

Abstract

The purpose of this study is to identify human walking lateral force by using FFT power spectrum from the experimental acceleration data of the human body. An experiment on human walking is carried out on a stationary floor paying attention to higher components of dynamic lateral walking force. It is known that the lateral main component with frequency of fh is applied at half the footfall frequency of f_w (f_h =0.5×f_w). Based on measured lateral acceleration data of the human lumbar, not only main component with frequency of f_h, but also higher component with frequency of 2×f_h, 3×f_h is observed. Characteristics of these higher components of dynamic force by walking are revealed from the dynamic design viewpoint of pedestrian suspension bridges prone to lateral vibration due to the crowd.