Assessment of tibial stiffness by vibration testing in situ—I. Identification of mode shapes in different supporting conditions
作者： A.B. Christensen , F. Ammitzbøll , C. Dyrbye , M. Cornelissen , P. Cornelissen
DOI: 10.1016/0021-9290(86)90108-9
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摘要: Abstract Vibrational methods to monitor fracture healing, the BRA and IFR, are compared under different supporting conditions, excitation technique signal processing. Mode shapes identified by modal analysis. A wet excised human tibia an amputation specimen investigated. Excitation processing caused only minor differences in resonance frequencies. The conditions had important influence on single bending modes changing both mode-shapes Thus BRA-splint imposed a node at malleolus. Modal analysis revealed following two conditions: BRA-splint: ‘rigid body’ mode of 165 Hz sagittal plane. 315 close IFR-hanging leg: ‘rigid-body’ 167 Two (‘free-free’), 303 frontal plane 470
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