TY - JOUR
T1 - Uncoupled Spatial Biodynamic Model for Seated Humans Exposed to Vibration-Development and Validation
AU - Yu, Z.
AU - Zhao, Q.
AU - Yang, James
AU - Xia, Y.
AU - Ma, Y.
N1 - Funding Information:
During the test, excitations are applied in the global coordinates X, Y, and Z directions at the same time, and the subjects are required to relax and maintain a natural posture. The legs is supported vertically on the MTS test bench, the arm is placed on the armrest of the chair, the head is upright, and the eyes look straight ahead. Each subject repeats the test once under the same test conditions and rests for 5 min between the two tests. The white noise excitation sampling time is 60s, and the sine sweep frequency excitation sampling time is 220s. Since the seat used in this article has good rigidity, the acceleration signals on the MTS test bench is consistent with the seat acceleration signals.This work was particularly supported by the National Natural Science Foundation of China (Award number: 51875296). We appreciate China Automotive Technology and Research Center (CATARC) for helping to conduct experiments.
Funding Information:
This work was particularly supported by the National Natural Science Foundation of China (Award number: 51875296 ). We appreciate China Automotive Technology and Research Center (CATARC) for helping to conduct experiments.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021
Y1 - 2021
N2 - Human body is sensitive to whole body vibration and ride discomfort due to vibration has brought lots of concerns in recent years due to requirement of better ride comfort performance for newly developed vehicles. Vehicle ride discomfort has a direct effect on driver's performance and will result in overall customer satisfaction. This paper presents an uncoupled spatial seated human multi-body dynamic model with 48 degrees of freedom based on Chinese occupants' characteristic to evaluate vehicle ride discomfort. The model is composed of feet, legs, thighs, trunk, head, and neck and it includes the uncoupled longitudinal, lateral and vertical translational motions and pitch, roll and yaw rotational motions for whole body vibration. Based on the vibration transmissibility from the seat to head as the evaluation index of human dynamic response, the low-frequency three directional vibration test of human body is carried out with eight subjects. The acceleration responses of human head are recorded and then the seat to head vibration transmissibility is obtained. The genetic algorithm (GA) is implemented to identify the parameters for the uncoupled spatial biodynamic model and the objective function is defined by minimizing the square sum of the difference between the test value and the simulation value of the vibration transmissibility from the seat to head. The goodness of fit is used as the index to evaluate the effect of model. The results show that the model can well capture the seat to head vibration transmissibility response for whole body vibration. The uncoupled spatial biodynamic model can be used to guide the design of better ride comfort vehicles.
AB - Human body is sensitive to whole body vibration and ride discomfort due to vibration has brought lots of concerns in recent years due to requirement of better ride comfort performance for newly developed vehicles. Vehicle ride discomfort has a direct effect on driver's performance and will result in overall customer satisfaction. This paper presents an uncoupled spatial seated human multi-body dynamic model with 48 degrees of freedom based on Chinese occupants' characteristic to evaluate vehicle ride discomfort. The model is composed of feet, legs, thighs, trunk, head, and neck and it includes the uncoupled longitudinal, lateral and vertical translational motions and pitch, roll and yaw rotational motions for whole body vibration. Based on the vibration transmissibility from the seat to head as the evaluation index of human dynamic response, the low-frequency three directional vibration test of human body is carried out with eight subjects. The acceleration responses of human head are recorded and then the seat to head vibration transmissibility is obtained. The genetic algorithm (GA) is implemented to identify the parameters for the uncoupled spatial biodynamic model and the objective function is defined by minimizing the square sum of the difference between the test value and the simulation value of the vibration transmissibility from the seat to head. The goodness of fit is used as the index to evaluate the effect of model. The results show that the model can well capture the seat to head vibration transmissibility response for whole body vibration. The uncoupled spatial biodynamic model can be used to guide the design of better ride comfort vehicles.
M3 - Article
AN - SCOPUS:85111339197
SP - 103171
JO - International Journal of Industrial Ergonomics
JF - International Journal of Industrial Ergonomics
ER -