Journal
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
Volume 58, Issue 10, Pages 2987-2990Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TBME.2011.2160061
Keywords
Biomechanics; finite element (FE) analysis; harmonic analysis; lumbar spine; modal analysis
Categories
Funding
- Program for New Century Excellent Talents in University [NCET-08-0103]
- Research Fund for the Doctoral Program of Higher Education [20100042110013]
- Natural Science Foundation of China [50875041]
- National 973 Program [2007CB210305-2]
- Fundamental Research Fund of Central Universities [N090503001]
- Program for Changjiang Scholars and Innovative Research Team in University, China [IRT0816]
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This study was designed to investigate the modal characteristics of the human spine. A 3-D finite element model of the spine T12-Pelvis segment was used to extract resonant frequencies and modal modes of the human spine. By finite element modal analysis and harmonic response analysis, several lower vibration modes in the flexion-extension, lateral bending, and vertical directions were obtained and its vibration configurations were shown in this paper. The results indicate that the lowest resonant frequency of the model is in the flexion-extension direction. The second-order resonant frequency is in the lateral bending direction and the third-order resonant frequency of the T12-Pelvis model is in the vertical direction. The results also show that lumbar spinal vertebrae conduct the rotation action during whole body vibration (WBV). The vibration configurations of the lumbar spine can explore the motion mechanism of different lumbar components under WBV and make us to understand the vibration-induced spine diseases. The findings in this study will be helpful to understand WBV-related injury of the spine in clinics and the ergonomics design and development of mechanical production to protect human spine safety.
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