【Key words】 Bone Mineral Density； Compression Intensity； Compression Stiffness； Kyphoplasty； Domestic Polymethylmetharylate； Injectable Calcium Phosphate Cement；
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原点压缩刚度 origin compression stiffness
Under the same loading condition as short segment posterior fixation devices encountering in fatigue test, this model was stricted and loaded. Through structure analysis, the strain/stress distributions in it and compression stiffness were processed.
方法:通过有限单元法(FEM)的结构分析功能,建立新型脊柱外固定器的计算机模型,并根据外固定器固定在椎体上的重力受压情况模拟加载,仿真分析模型各部分的应力、应变值及分布和压缩刚度。
参考来源 - 新型脊柱外固定器的生物力学有限元分析·2,447,543篇论文数据，部分数据来源于NoteExpress
对所有试件进行压缩刚度、扭矩刚度、最大扭矩等生物力学实验，观察不同截骨形状的稳定性。
So, such biomechanical experiments as compression rigidity, torsion rigidity and maximal torsion were carried out, and the steadiness of differently resected bones were observed.
对所有标本进行压缩刚度，拉伸刚度，扭矩刚度，弯曲刚度等生物力学实验，观察不同固定方法的稳定性。
So, such biomechanical experiments as compression rigidity, tension rigidity, torsion rigidity, bending rigidity were carried out, and the steadiness of different fixation methods was observed.
依据这一模型，分析了单轴压缩时岩石破坏阶段声发射特性与压机刚度的关系。
The relation between AE characteristics during rock failure and machine stiffness is analysed under uniaxial compression with the above model.
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