悬吊运动训练对腰椎受力安全性预测仿真

发布时间：2018-04-09 01:21

本文选题：悬吊运动训练　切入点：腰椎受力　出处：《计算机仿真》2017年05期

【摘要】：悬吊运动训练是以持久改善肌肉骨骼疾病为目的,为了更好地研究悬吊运动促进人体躯干核心肌肉收缩而产生训练效果,需要组建数学力学模型来进行腰椎受力安全性预测。但是采用当前预测方法进行安全性预测时,无法计算出悬吊运动训练对腰椎间盘应力影响,存在预测误差大的问题。提出基于虚拟裂纹闭合法的悬吊运动训练时腰椎受力安全性预测方法。先在LS-DYNA有限元软件下,利用虚拟裂纹闭合理论给出患者脊柱因其生理性前后凸转折处,表述患者在悬吊运动训练时腰椎逐渐增大负荷的受力动态过程,得到患者腰椎受力薄弱环节动态应力和其区域节点力和位移与时间的关系曲线,计算出患者的脊柱牵引在仰卧载荷和双下肢悬吊冲击载荷作用下的应力,得到患者的双臂悬挂下屈膝以手臂承受体重而产生的腰椎受力冲击波强度,对悬吊运动训练对腰椎受力情况进行安全性预测。仿真结果表明,改进预测方法可为研究脊柱内部结构的生理特性及治疗提供了有力的依据。
[Abstract]:The purpose of suspension training is to improve musculoskeletal diseases. In order to better study the effect of suspension training on promoting the contraction of core muscles of human trunk, it is necessary to set up a mathematical and mechanical model to predict the safety of lumbar vertebrae.However, it is impossible to calculate the effect of suspension training on the stress of lumbar intervertebral disc when the current prediction method is used to predict the safety, and there is a problem of large prediction error.A method for predicting the safety of lumbar vertebrae force during suspension training based on virtual crack closure method is presented.Firstly, by using the virtual crack closure theory, the dynamic process of the lumbar spine load increasing during the suspension training is described by using the virtual crack closure theory under the LS-DYNA finite element software, which shows the turning point of the spine because of its physiologic protruding.The dynamic stress of the weak link of the lumbar vertebrae and the relationship between the regional node force and displacement and time were obtained, and the stress of the patient's spinal traction under supine load and lower limb suspension impact load was calculated.The shock wave intensity of lumbar vertebrae force produced by the knee bending under the suspension of the two arms to bear the weight of the arm was obtained, and the safety prediction of the stress condition of the lumbar vertebrae by the suspension training was carried out.The simulation results show that the improved prediction method can provide a powerful basis for the study of the physiological characteristics and treatment of the internal structure of the spine.
【作者单位】：遵义师范学院体育学院;
【基金】：2015年贵州省本科教学工程建设项目(2015-337)
【分类号】：R87

【相似文献】