Annulus Calibration Increases the Computational Accuracy of the Lumbar Finite Element Model.
Annulus Calibration Increases the Computational Accuracy of the Lumbar Finite Element Model.
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DOI：
10.1177/21925682221081224
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发表时间：
2023-10
影响因子：
2.4
通讯作者：
Liu, Yang
中科院分区：
文献类型：
--
作者：
Xu, Chen;Xi, Zhipeng;Fang, Zhongxin;Zhang, Xiaoyu;Wang, Nan;Li, Jingchi;Liu, Yang
机械模拟。环空标定不充分会对有限元模型的计算精度产生不利影响。具体地说，环空平均半径的定义没有统一的标准。当使用线弹性材料来定义其材料属性时，环空不同层和不同部分的弹性模数之间的差异没有得到完全校准。本研究旨在通过对环空的标定来优化有限元模型的计算精度。我们通过消除在屈曲-伸展负荷条件下计算的活动范围与体外实验测量的活动范围之间的差异，校准了我们前构建的腰椎模型中的环状AR和弹性模数。通过将计算的指标与体外研究中测量的指标进行比较，执行多指标验证。为了评估计算效率，还记录了不同模型所需的计算时间。当标定环空AR和弹性模数时，计算值与实测值的误差小于1%。在模型验证过程中，校准的有限元模型计算的所有指标与体外研究的平均值的标准偏差均在±1以内。在几乎所有加载条件下，计算值与实测值之间的最大偏差小于10%。不同模型的计算时间没有明显的变化趋势。该有限元模型具有较高的计算精度，可用于后续的力学研究。
Mechanical simulations. Inadequate calibration of annuli negatively affects the computational accuracy of finite element (FE) models. Specifically, the definition of annulus average radius (AR) does not have uniformity standards. Differences between the elastic moduli in the different layers and parts of the annulus were not fully calibrated when a linear elastic material is used to define its material properties. This study aims to optimize the computational accuracy of the FE model by calibrating the annulus. We calibrated the annulus AR and elastic modulus in our anterior-constructed lumbar model by eliminating the difference between the computed range of motion and that measured by in vitro studies under a flexion-extension loading condition. Multi-indicator validation was performed by comparing the computed indicators with those measured in in vitro studies. The computation time required for the different models has also been recorded to evaluate the computational efficiency. The difference between computed and measured ROMs was less than 1% when the annulus AR and elastic modulus were calibrated. In the model validation process, all the indicators computed by the calibrated FE model were within ±1 standard deviation of the average values obtained from in vitro studies. The maximum difference between the computed and measured values was less than 10% under nearly all loading conditions. There is no apparent variation tendency for the computational time associated with different models. The FE model with calibrated annulus AR and regional elastic modulus has higher computational accuracy and can be used in subsequent mechanical studies.
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DOI：
10.3969/j.issn.1003-0034.2018.12.011
发表时间：
2018-12-25
影响因子：
--
作者：
Liu, Jian-Tao;Han, Hua;He, Xi-Jing
通讯作者：
He, Xi-Jing
影响因子：
2.6
作者：
Li J;Xu C;Zhang X;Xi Z;Sun S;Zhang K;Fang X;Xie L;Liu Y;Song Y
通讯作者：
Song Y
影响因子：
--
作者：
Li J;Zhang LC;Li J;Zhang H;Zhao JX;Zhang W
通讯作者：
Zhang W
影响因子：
3.5
作者：
Mengoni M
通讯作者：
Mengoni M
微创颈椎手术与颈椎前路椎间盘切除融合术后相邻节段生物力学的比较分析：有限元研究。
影响因子：
6.6
作者：
Chen, Chao;Yuchi, Chen-Xi;Yang, Qiang
通讯作者：
Yang, Qiang