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Experimental modal analysis on fresh-frozen human hemipelvic bones employing a 3D laser vibrometer for the purpose of modal parameter identification

: Neugebauer, Reimund; Werner, M.; Voigt, C.; Steinke, H.; Scholz, R.; Scherer, S.; Quickert, M.

Preprint urn:nbn:de:0011-n-1736756 (584 KByte PDF)
MD5 Fingerprint: 9d971785e2d212538e674490084eb4c6
Created on: 4.8.2011

Journal of biomechanics 44 (2011), No.8, pp.1610-1613
ISSN: 0021-9290
Journal Article, Electronic Publication
Fraunhofer IWU ()
Pelvic bone; modal analysis; vibration testing; laser vibrometer

To provide a close-to-reality simulation model, such as for improved surgery planning, this model has to be experimentally verified. The present article describes the use of a 3D laser vibrometer for determining modal parameters of human pelvic bones that can be used for verifying a finite elements model. Compared to previously used sensors, such as acceleration sensors or strain gauges, the laser vibrometric procedure used here is a non-contact and non-interacting measuring method that allows a high density of measuring points and measurement in a global coordinate system. Relevant modal parameters were extracted from the measured data and provided for verifying the model. The use of the 3D laser vibrometer allowed the establishment of a process chain for experimental examination of the pelvic bones that was optimized with respect to time and effort involved. The transfer functions determined feature good signal quality. Furthermore, a comparison of the results obtained from pairs of pelvic bones showed that repeatable measurements can be obtained with the method used.