Flexible multibody simulation approach in the analysis of tibial strain during walking
Flexible multibody simulation approach in the analysis of tibial strain during walking
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DOI：
10.1016/j.jbiomech.2007.12.002
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发表时间：
2008-01-01
影响因子：
2.4
通讯作者：
Mikkola, A.
中科院分区：
文献类型：
--
作者：
Al Nazer, R.;Rantalainen, T.;Mikkola, A.
骨组织内的应变在骨（再）建模中起主要作用。这些小应变可以使用实验应变计测量来评估，这是具有挑战性和侵入性的。此外，应变测量在实践中仅限于表面骨的某些区域，诸如胫骨的前表面。在这项研究中，胫骨应变发生在步行过程中估计使用数值方法的基础上灵活的多体动力学。在所介绍的方法中，下半身肌肉骨骼模型的开发，采用运动捕捉数据从步行以恒定的速度。运动捕捉数据被用于逆动力学仿真中，以教导模型中的肌肉在正动力学仿真中复制运动。该模型预测的最大和最小胫骨主应变分别为490和-588微应变，这与体内测量的文献值一致。总之，非侵入性的柔性多体仿真方法可以用作实验骨应变测量的替代品，从而在不同应用中用于骨骼的详细应变估计。(c)2007爱思唯尔有限公司保留所有权利。
Strains within the bone tissue play a major role in bone (re)modeling. These small strains can be assessed using experimental strain gage measurements, which are challenging and invasive. Further, the strain measurements are, in practise, limited to certain regions of superficial bones only, such as the anterior surface of the tibia. In this study, tibial strains occurring during walking were estimated using a numerical approach based on flexible multibody dynamics. In the introduced approach, a lower body musculoskeletal model was developed by employing motion capture data obtained from walking at a constant velocity. The motion capture data were used in inverse dynamics simulation to teach the muscles in the model to replicate the motion in forward dynamics simulation. The maximum and minimum tibial principal strains predicted by the model were 490 and -588 microstrain, respectively, which are in line with literature values from in vivo measurements. In conclusion, the non-invasive flexible multibody simulation approach may be used as a surrogate for experimental bone strain measurements and thus be of use in detailed strain estimations of bones in different applications. (c) 2007 Elsevier Ltd. All rights reserved.