Material Property Sensitivity Analysis on Resonant Frequency Characteristics of the Human Spine

in Journal of Applied Biomechanics

Click name to view affiliation

Li-Xin GuoNortheastern University, Shenyang, China

Search for other papers by Li-Xin Guo in
Current site
Google Scholar
PubMed
Close
,
Zhao-Wen WangNortheastern University, Shenyang, China

Search for other papers by Zhao-Wen Wang in
Current site
Google Scholar
PubMed
Close
,
Yi-Min ZhangNortheastern University, Shenyang, China

Search for other papers by Yi-Min Zhang in
Current site
Google Scholar
PubMed
Close
,
Kim-Kheng LeeNanyang Technological University, Singapore

Search for other papers by Kim-Kheng Lee in
Current site
Google Scholar
PubMed
Close
,
Ee-Chon TeoNanyang Technological University, Singapore

Search for other papers by Ee-Chon Teo in
Current site
Google Scholar
PubMed
Close
,
He LiNortheastern University, Shenyang, China

Search for other papers by He Li in
Current site
Google Scholar
PubMed
Close
, and
Bang-Chun WenNortheastern University, Shenyang, China

Search for other papers by Bang-Chun Wen in
Current site
Google Scholar
PubMed
Close
Restricted access

The aim of this study is to investigate the effect of material property changes in the spinal components on the resonant frequency characteristics of the human spine. Several investigations have reported the material property sensitivity of human spine under static loading conditions, but less research has been devoted to the material property sensitivity of spinal biomechanical characteristics under a vibration environment. A detailed three-dimensional finite element model of the human spine, T12– pelvis, was built and used to predict the influence of material property variation on the resonant frequencies of the human spine. The simulation results reveal that material properties of spinal components have obvious influences on the dynamic characteristics of the spine. The annulus ground substance is the dominant component affecting the vertical resonant frequencies of the spine. The percentage change of the resonant frequency relative to the basic condition was more than 20% if Young’s modulus of disc annulus is less than 1.5 MPa. The vertical resonant frequency may also decrease if Poisson’s ratio of nucleus pulposus of intervertebral disc decreases.

Guo, Zhang, Li, and Wen are with the School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China; Wang is with the School of Materials and Metallurgy, Northeastern University, Shenyang, China; and Lee and Teo are with the School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.

  • Collapse
  • Expand