The harmonious equilibrium method is used to comfirmed the results. The non-linear frequency obtained by considering the geometry non-linearity.
在管道系统振动时的考虑几何非线性因素，完成了非线性自由振动频率的计算及讨论参数对其的影响。
参考来源 - 复杂约束输流管道的稳定性与分岔The nonlinear analysis of lattice is usually divided into the geometry non-linearity and the material non-linearity.
网壳结构的非线性分析分为几何非线性与材料非线性。
参考来源 - 带随机缺陷网壳结构的极限荷载·2,447,543篇论文数据，部分数据来源于NoteExpress
The contact pretension between the layers of cylindrical structure concerns the non-linearity of geometry and material, as well as the influence of interface friction.
多层圆柱结构的接触预紧问题，涉及到几何非线性和材料非线性以及接触面上摩擦力的影响。
This article use nonlinear finite element method, considering the non-linearity both in material properties and in geometry of deformations.
本文采用的是非线性有限元法，它计及了材料和几何的非线性因素。
Based on the experiments of G550 cold-formed thin-walled steel roof truss structures, an analysis model considering geometry and material non-linearity is established using general FEM software ANSYS.
基于已完成的G550冷弯薄壁型钢屋架结构承载力试验，采用通用有限元软件ANSYS，建立考虑材料和几何非线性的分析模型。
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