拱桥的固有频率对几何缺陷大小很敏感。
The natural frequency of arch bridge is sensitive to the value of geometrical imperfection.
因此对有初始几何缺陷的冷却塔风筒壁的分析研究是很有必要的。
Therefore, it is of great significance to study the cooling tower shell with initial geometrical imperfections.
角变形或其他几何缺陷的存在，造成膜应力和剪应力沿着器坒而变化。
The presence of angular distortion or other types of geometric defects causes the membrane stress and shear stress to vary along the wall.
研究了几何缺陷、荷载非均匀分布和支座沉陷对圆弧拱面内屈曲的影响。
The effects of geometrical imperfections, unuhiform loads and support settlements on the in-plane buckling of circular arch are investigated.
通过杀死焊接接头有限元模型中相应位置的单元，模拟存在的几何缺陷。
Geometric flaws were simulated by killing the specified elements of a finite element model of joint.
结果表明，考虑初始几何缺陷会使得拱桥的主要自振频率降低，振型发生改变。
Results showed that the defects in the arch decreased the frequency of free vibration and changed the modes.
在有限元模拟中，分析了初始几何缺陷对壳体起皱的临界压力和起皱形态的影响。
The effect of the initial geometrical imperfection on the buckling critical pressure and buckling model has been taken into account in the finite element simulation.
初始几何缺陷对板片结构体系稳定性的影响是板片结构计算和设计中的一个关键问题。
The effect of initial geometrical imperfections on the stability of sheet space structure is a key to its design and calculation.
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.
其次，讨论了典型的轴对称形式的初始几何缺陷对复合材料圆柱壳轴压稳定性的影响。
Secondly, the influence of typical axisymmetrical initial geometrical imperfections on the stability of composite cylindrical shells under axial compression is discussed.
计算中考虑了残余应力和初始几何缺陷的影响，应力应变关系取理想弹塑性本构关系。
The effects of the residual stress and the initial geometrical defects were considered during the calculations, and an ideal elastoplastic constitutive relation was taken as …
结果表明，结构的几何缺陷将严重影响结构的失稳形式，从而影响结构的极限承载能力。
The results show that the initial geometrical imperfection of the structure influences heavily its instability forms, which results in an effect on the ultimate load bearing capacity of the structure.
结果表明，考虑随机几何缺陷后，系统的低阶固有频率将降低，内力阵风响应因子将升高。
It is shown that, the basic natural frequency will decrease and the internal force response factor will increase if the random geometric imperfections are taken into consideration.
与承受内压的容器不同，真空容器往往发生的是稳定性破坏，而且对自身的几何缺陷非常敏感。
Different from vessels under internal pressure loading, vacuum vessels usually fail with the instability which is very sensitive to the geometrical defects.
讨论了横向剪切变形，曲板几何参数，铺层数，铺展方式和初始几何缺陷等各种参数变化的影响。
The effects played by transverse shear deformation, panel geometric parameters, total number of plies, fiber orientation, and initial geometric imperfections are studied.
提出多层不等厚可看成是圆柱壳壳壁上的几何缺陷，在一定程度上会减弱经典圆柱壳的屈曲临界应力水平。
The character of unequal-thickness was considered as geometrical defect, which decreases the critical stress of classical shell buckling to some extent.
采用弹塑性有限元法，结合非线性屈曲理论，分析了受初始几何缺陷影响的管线钢管在内压作用下的非线性屈曲。
Secondly, with the first mode of eigenvalue analysis on SSRS as the initial disfigurement, nonlinear buckling loads are obtained by nonlinear buckling analysis.
该方法能够考虑结构及构件的二阶效应、几何缺陷和残余应力等多种非线性因素的影响，还可以考虑连接的半刚性性能。
The second order effects of the whole structure and its members, geometric imperfections and residual stress as well as the feature of semi-rigid connections can be taken into account in this method.
把辊轧成型的C形冷弯薄壁型钢构件切割成若干短柱，在短柱中将产生不同程度的歪曲变形，进而引起附加的初始几何缺陷。
Cutting roll-formed steel C-section to stub columns will produce different extent of cross section distortion along the lengths and cause additional initial geometric imperfections.
节点位置偏差是影响大跨度空间结构整体稳定性的一个主要初始几何缺陷，但目前关于实际结构中节点位置缺陷的资料还很少。
The initial deviations of the joint positions are the main initial geometrical imperfections that affect the stability behaviors of the long-span spatial structures.
最后对空储液罐的特征值问题进行了多达近万自由度的计算分析，得到了一些成果，其中有新的发现：（1）空储液罐的多波现象在无初始几何缺陷时依然存在，而且出现在低阶振型中；
In these results there are some new findings:(1) when there is not initial geometry defect, multi-waves phenomena still exist and are presented in low orders in vibrative mode shape;
采用像素点变换法，实现了根据三维物体的二维投影图像恢复物体表面的真实几何面积的设想，大大降低了缺陷面积计算的误差；
To decrease the relative errors, the pixel transform method was adopted to recover the geometrical feature of sphere fruit surface from projected image while the area of defect was calculated.
另外，还建立了考虑双层网格扁壳结构几何初始缺陷影响的非线性弯曲方程。
Besides, he also established the nonlinear bending equations considering the influence of initial geometric defects in the double-deck reticulated shallow shell structures.
根据非线性缺陷连续统的4维几何理论，导出了位错和旋错的连续性方程。
On the basis of the 4-dimensional geometric theory of the nonlinear defect continuum, the continuity equations of dislocations and disclinations are derived.
工业CT图像和DR图像缺陷检测的目的，就是为了从图像中定位出工件缺陷的所在，并获得有关缺陷的几何参数等信息。
Defect detection of ICT images and DR images is to locate the defects of workpiece in images and get defects 'geometric parameters information as accurate as possible.
ICT是在无损状态下检测物体断层的灰度图像，以其灰度来分辨被检测断面内部的几何结构、材质情况、缺陷种类等。
ICT can detect gray image of the object's layer and does not destruct the object in the same time. ICT distinguish object layer's geometrical structure, material and defect type by gray.
计算内容包括静力计算、线性屈曲分析以及考虑初始缺陷的几何非线性稳定性计算。
The stability calculation has three parts, including static calculation, linear buckling analysis and geometrical nonlinear stability analysis.
通过金相及电镜断口分析，确定箱体失效系铸造缺陷和几何截面差过大所致。
Failure of cast aluminium alloy box was analysed by metallographic and fractographic analysis, and cast defect and variation of cross section thickness were identified as main causes of failure.
通过信号预处理使漏磁信号图像化，并提出一种基于管道漏磁检测技术的缺陷几何特征量化的方法。
Through the preprocessor so that the MFL signals into image, and presents the methods of quantitative recognition for the measure of defects base on MFL inspection.
通过信号预处理使漏磁信号图像化，并提出一种基于管道漏磁检测技术的缺陷几何特征量化的方法。
Through the preprocessor so that the MFL signals into image, and presents the methods of quantitative recognition for the measure of defects base on MFL inspection.
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