本文研究了加劲壳的非线性有限元分析方法，提出了一种梁元素来模拟加筋。
The paper studies nonlinear F. E. analysis of stiffened shells, presenting beam element to simulate the stiffeners.
出于这个原因，线性元素通常是非线性分析的首选。
For this reason, linear elements will usually be preferred for nonlinear analyses.
研究设计：采用非线性有限元素分析来研究真实的骨水泥分布对椎体生物力学的加强作用。
The biomechanics of vertebral bodies augmented with real distributions of cement were investigated using nonlinear finite element (FE) analysis.
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