因此对大型结构分析软件ANSYS的三维非线性计算功能进行了深入研究，在此基础上完成了基于非线性有限单元法的高拱坝坝肩稳定计算分析。
Basic theory of nonlinear FEM analysis and its realization in ANSYS were studied. Accomplish stability analysis of high arch dam abutment based on nonlinear FEM analysis.
从结构的几何非线性分析着手，研究截面为三角形的空间格构式斜腿刚架的平面内整体稳定。
Based on the geometric non-linear analysis, the in-plane global stability of Space Lattice Tilted Column Frame of Triangle Section(SLTCF)is studied.
分析材料非线性、阻尼、初始几何缺陷、初始静荷载等因素对结构动力稳定性的影响。
The effects of material nonlinearity, damping, initial geometric imperfection and initial static load on structure dynamic stability have been analyzed.
本文采用混合分析法进行空间组合结构施工阶段的几何非线性稳定计算。
The paper applies the mixed analysis to calculate the geometric nonlinear stability of space composite structures at construction stage.
在李雅普诺夫稳定性准则的基础上导出了求解结构非线性动力稳定性分析的数学-力学模型。
This paper presents a mathematical and mechanic model for non-linear dynamicstability analysis of structures on the basis of Liapunov's stability criteria.
本文采用有限元法分析考虑前屈曲几何非线性影响的结构稳定性。
This paper provides the structural stability analysis considering geometric nonlinearity on the prebuckling path by the finite element method.
由二阶理论建立了梁杆结构分析的精确几何非线性有限元增量平衡方程，并利用精确有限元方法对一些典型结构进行了稳定性分析。
Accurate geometry! Non linear finite element increment equilibrium equation is set up by two orders theory. Typical structure stability is analyzed with this accurate finite element method.
基于非线性有限元原理对预应力空间钢结构进行了稳定性能分析。
Stability analysis is carried out with prestressed spatial steel structures according nonlinear finite element theory.
文中在圆判据非线性稳定性理论基础上，进行空空导弹变结构制导系统的稳定性分析。
The stability analysis of variable structure guidance system of an air-to-air missile was conducted based on the circle criterion nonlinear stability analysis theory.
本文在严格、完整的基础上，利用矩阵范数理论研究了结构非线性动力分析中数值积分格式的稳定性问题，给出了判别单自由度非线性动力方程积分格式稳定性的一般数学准则。
The problem of stability in the numerical integration schemes of nonlinear dynamic analysis of structures is discussed by using matrix and norm theory on a rigorous and complete basis in this paper.
针对单层k8型网壳结构在强震时的动力稳定问题，应用非线性有限元理论进行了分析。
To the dynamic stability of the K8 single layer latticed shell structures under the seismic loads, this paper carried out the dynamic stability analysis based on the nonlinear finite element theory.
可用于分析缺陷对结构非线性弹塑性反应的影响，也可用于带缺陷的非线性问题求解及稳定性分析。
The equations can be used to analyze the effects of imperfections on the elastoplastic response of structures and they are also useful for the solution of nonlinear problems and buckling analysis.
如果该非线性分析收敛失败，包括检测出结构不稳定，则用旧的荷载比乘以备份比，来计算新的荷载比。
If the nonlinear analysis fails to converge, including the detection of a structural instability, a new Loading rate is compute by multiplying the old rate by the Backup rate.
基于上述理论，开发了可考虑几何非线性效应的细长结构稳定性分析软件。
Based on the above theory, finite element software is developed to analyze the geometrically nonlinear stability of slender structure.
并用非线性方法和特征值方法对结构稳定性进行分析，得出直管段的稳定临界载荷。
By using the method of eigenvalue analysis and nonlinear analysis, the structure stability was analyzed, and the critical load of straight pipe was, then, obtained.
本文研究了塔架结构的极限承载力问题。通过双重非线性稳定性分析计算塔架结构的极限承载力。
The ultimate load of tower structure has been studied by using double-nonlinear buckling analysis in this thesis.
非线性分析结果显示，横桥向风载在主梁上的不平衡加载对结构的稳定性影响不大；
The result of nonlinear analysis shows that the imbalance loads windward on the main girder of the transverse bridge effect little to the structure stability;
分别采用线性和非线性的有限元方法，对复合材料加筋壁板盒段结构的扭转稳定性和弯曲稳定性进行了计算，并将计算结果与试验结果进行了对比分析。
Finite element method was adopted to research the buckling problem of the composite box structure, which was composed by lots of different thin-panel members and was simplified.
结构的特征值屈曲分析及几何材料双非线性全过程分析表明，结构的稳定承载力满足要求。
The buckling analysis and nonlinear full-range analysis with both geometrical and material nonlinearity showed that the stable bearing capacity met the requirements.
文中分析了多变量非线性内模控制结构的鲁棒稳定性及动态性能。
The robust stability of the closed-loop system is proved, and its performance is analyzed.
文中分析了多变量非线性内模控制结构的鲁棒稳定性及动态性能。
The robust stability of the closed-loop system is proved, and its performance is analyzed.
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