TY - JOUR
T1 - Numerical study on the walking load based on inverted-pendulum model
AU - Cao, Liang
AU - Liu, Jiepeng
AU - Zhang, Xiaolin
AU - Chen, Y. Frank
N1 - Funding Information:
The authors are grateful for the financial support provided by Fundamental Research Funds for the Central Universities (Grant No. cqu2018CDHB1A08) and National Natural Science Foundation of China (Grant No. 51622802, 51438001).
Publisher Copyright:
Copyright © 2019 Techno-Press, Ltd.
PY - 2019/8/10
Y1 - 2019/8/10
N2 - In this paper, an inverted-pendulum model consisting of a point supported by spring limbs with roller feet is adopted to simulate human walking load. To establish the kinematic motion of first and second single and double support phases, the Lagrangian variation method was used. Given a set of model parameters, desired walking speed and initial states, the Newmark-β method was used to solve the above kinematic motion for studying the effects of roller radius, stiffness, impact angle, walking speed, and step length on the ground reaction force, energy transfer, and height of center of mass transfer. The numerical simulation results show that the inverted-pendulum model for walking is conservative as there is no change in total energy and the duration time of double support phase is 50-70% of total time. Based on the numerical analysis, a dynamic load factor αwi is proposed for the traditional walking load model.
AB - In this paper, an inverted-pendulum model consisting of a point supported by spring limbs with roller feet is adopted to simulate human walking load. To establish the kinematic motion of first and second single and double support phases, the Lagrangian variation method was used. Given a set of model parameters, desired walking speed and initial states, the Newmark-β method was used to solve the above kinematic motion for studying the effects of roller radius, stiffness, impact angle, walking speed, and step length on the ground reaction force, energy transfer, and height of center of mass transfer. The numerical simulation results show that the inverted-pendulum model for walking is conservative as there is no change in total energy and the duration time of double support phase is 50-70% of total time. Based on the numerical analysis, a dynamic load factor αwi is proposed for the traditional walking load model.
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U2 - 10.12989/sem.2019.71.3.245
DO - 10.12989/sem.2019.71.3.245
M3 - Article
AN - SCOPUS:85071642758
SN - 1225-4568
VL - 71
SP - 245
EP - 255
JO - Structural Engineering and Mechanics
JF - Structural Engineering and Mechanics
IS - 3
ER -