弯扭

The structure parameter influences on lateral stability, such as arch axis coefficient, arch high span ratio, crankle rigidity ratio of arch rib, vertical and lateral rigidity ratio of arch rib, lateral rigidity of bridge decking and arch rib ratio, crossbeam number, rigidity of crossbeam number the effect of non-orientedly conservative loadings of bridge deck and width span ratio, were discussed. Corresponding numerical charts were given, and they may be of some reference value and helpful to the parameter design of ribbed arches.

考虑了拱轴系数、矢跨比、拱肋抗扭刚度与横向抗弯刚度比、拱肋的竖向抗弯刚度与横向抗弯刚度比、横系梁在拱肋切平面内的抗弯刚度和拱肋的横向抗弯刚度比、横系梁在拱肋径向的抗弯刚度与拱肋的横向抗弯刚度比、桥面系的横向抗弯刚度与拱肋的横向抗弯刚度比、横系梁的数量、桥面系横向刚度引起的非保向力效应及拱肋间距与跨径的比对组拼拱横向稳定的影响，并给出了相应的图表，为拱桥设计时拱肋的结构参数的选取提供一定的依据。

This model can be used in the analysis of the stability of bending-torsionof thin-walled structures and the analysis of ultimate bearing capacity of spatial member structures.

采用本文提出的几何非线性分析力学模型可进行薄壁空间杆系结构的弯扭失稳分析，为实现薄壁杆系结构的极限承载力分析提供了较为精确合理的分析力学模型。

Aiming at the fracture in operation of damageable pump shaft used on locomotive, macroscopic and microscopic analysis of the pattern of fractured cross section in pump shaft is conducted and it is recognized that the fracture is typically caused by combined action of bending and torsion fatigue.

针对机车用水泵轴在使用中容易发生断裂的问题，对水泵轴断口的宏观和细观形貌进行了分析，认为断口为典型的弯扭复合疲劳断口。通过检测水泵轴上装配的齿轮，发现由于齿轮的加工误差过大，在轴的退刀槽根部造成了较大的附加拉应力，最终导致轴的断裂。因此及时消除齿轮的加工误差，同时提高安装精度，是防止此类断裂发生的关键

Secondly, on the basis of elastic-plastic stability analysis, referring to the stability design method of monosymmetric section axially loaded compression members, equivalent slenderness of pin-ended circular steel arch subject to hydrostatic pressure are deduced from the expression of out-of-plane elastic buckling load.

在弹塑性平面外稳定性分析的基础上，借鉴单轴对称截面轴心受压构件的弯扭屈曲设计方法，提出以面外屈曲荷载对应的正则化长细比为参数进行面外稳定性设计的方法。

Results present that when the lateral-torsional coupling is considered, the responses in the lateral direction of the coupled system subjected to a initial disturbance and a harmonic excitation in the torsional direction, respectively, can be occurred in different forms, and show great effects. However the responses in torsional direction subjected to lateral disturbance and harmonic excitation are slightish.

对系统进行了非线性响应数值计算和相应的频谱分析，结果显示弯扭耦合后，在扭转方向的扰动和简谐干扰扭矩均会以不同的形式在弯曲方向表现出来，并对系统的弯曲振动产生较大的影响；而弯曲振动对扭转振动的影响则要小得多。

Shafting ; crankling vibration ; frequency response function

轴系；弯扭振动；频域响应函数

Upon the basis of the design of the electrode for blisk EDM finishing,the searching of an interference-free path for feeding an electrode through twist channels of a rimed blisk is carried out, in which the ker-nel problem is the determination of the electrode kinematic constraints.

在涡轮叶盘EDM精加工中电极的设计的基础上，进行了电极在带冠叶盘弯扭狭窄通道中无干涉进给轨迹的搜索，其中的核心问题是电极运动约束条件的确定。

Its fluid flow passage is semi-enclosed with crank-ling blades, and its pressure surface and suction surface are both free-form surface, so manufacturing rimed turbine blisks is very difficult.

带冠整体涡轮盘具有高效率、高可靠性等许多优点，其流体通道属半封闭结构，叶片弯扭，叶盆和叶背均是自由曲面，难以加工制造。

Based on the Marc software package, a 3-dimensional finite element model was constructed to analyze the combined bend and torsion stress state of a bottom main drive spindle in the R2 roughing mill.

以某2250热轧带钢厂R2粗轧机承受较大载荷的下主传动轴为研究对象，采用Marc软件建立了该传动轴薄弱区段弯扭应力分析三维有限元模型。

The baber gives a brief introduction to the basic concept of reliability design,brings out,by the example of the design of the shaft which is deformed by the combining of bending and torsion,the...

本文介绍了可靠性设计的基本概念，并以受弯扭组合变形的转轴设计为例，导出转轴可靠性设计的方法和公式，把用可靠性设计方法计算出的结果和用传统设计方法计算出的结果进行比较，说明可靠性设计方法的优越性。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。