Biomedical Engineering Reference
In-Depth Information
10
High
Normal
Low
9
8
7
6
5
VT1
VT2
VT3
VT4
VT5
FIgure 15.14
The resonant frequencies of the finite element models due to variations of the material prop-
erty for the component groups VT1, VT2, VT3, VT4, and VT5.
10
High
Normal
Low
9
8
7
6
5
DT1
DT2
DT3
DT4
FIgure 15.15
The resonant frequencies of the finite element models due to variations of the material prop-
erty for the component groups DT1, DT2, DT3, and DT4.
10
High
Normal
Low
9
8
7
6
5
LT 1
LT2
LT 3
FIgure 15.16
The resonant frequencies of the finite element models due to variations of the material prop-
erty for the component groups LT1, LT2, and LT3.
resonant frequencies of the model. The results indicate that variations in the elastic modulus of the
disc annulus have a greater influence than other disc components. Figure 15.16 exhibits the effect
of the elastic modulus variations of ligaments on the resonant frequencies of the model. The results
show that the influence of the elastic modulus variations in LT2 is slightly greater than in LT1.
Figures 15.17 and 15.18 show the resonant frequencies and their relative percentage changes (against
the basic model) for the spinal component units: endplate, vertebra, intervertebral disc, ligament,
and all spinal components due to ±30% variations of the material properties of the T12-Pelvis FE
model, respectively. The results (Figures 15.17 and 15.18) indicate that the intervertebral disc plays
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