弯

Under normal circumstances a 90-degree elbow bend resistance than 120 degrees, and each 90-degree bend head loss of about 0.5 ~ 1 m, each 20 m pipeline will enable the head of the resistance loss of about 1 meter.

一般情况下90度弯管比120度弯管阻力大，每一90度弯管扬程损失约0.5～1米，每20米管道的阻力可使扬程损失约1米。

3D finite element model of concrete pavement in transverse joint with dowel bar s or without dowel bar s is established by 3D finite element numerical analysis method.

建立接缝无传力杆及设传力杆时水泥混凝土面层结构的三维有限元模型，运用数值分析方法，分析接缝处水泥混凝土面层的荷载应力、弯沉值和弯沉差，研究了地基模量、传力杆直径对荷载应力及弯沉差的影响规律，并对条件相同的计算结果进行了对比分析。

The rod may now be bent into lordosis using the Rod Bender (Figure 17). The rod does not have to

用弯棒钳将棒根据前凸弧度折弯(图-17)，棒不需要非常精确的折弯以适合螺钉的位置，特别是对于

The cut sections of rod may now be bent into lordosis using the Rod Bender (Figure 19). The rod

将剪裁好的棒用弯棒钳折弯(图-19)，棒不需非常要精确的折弯以适合螺钉的位置，特别是单节段的

Firstly, this paper introduce the present and prospective development, moreover compared advantage and short of different roll forming theory. Subsequently simplified process and analyzable model of channel section according to deforming elastic-plastic macro deforming finite element theory.

本文首先介绍了国内外关于辊式冷弯成型理论研究的现状与发展趋势，并比较了各成型理论的优缺点，随后在分析槽钢辊弯成型特点及其变形规律的基础上，以弹塑性大变形有限元理论为基础，对槽钢成型过程做出合理简化，建立分析模型，利用MARC软件对槽钢辊弯成型进行了三维有限元数值模拟分析。

Distortion discipline of line heating for automatic processing is researchedThe main influence factors of shell plate forming by line heating are analyzed. Based on the analysis of measured data processed by the experiment machine of line heating, thickness of plate, length of heating line, processing speed and shrinkage are regarded as 4 dimensions, and the methods of vectors mapping, plane projection and conversion of coordinates are used to build mathematical models for local surface shrinkage of different thickness and processing parameters.

1研究了自动化加工水火弯板变形规律分析了水火弯板加工成型的主要影响参数，在对水火弯板实验机加工测量数据分析的基础上，以板厚、加热线长度、加工速度和收缩量作为4个维度，应用向量映射，平面投影、坐标转换方法建立了不同钢板厚度的局部表面收缩量和加工参数的数学模型。

Experimental result shows that when the incident is vertically polarized, the head direction RCS average's variation along the relative curvature is of "W" shape and has 2 minimum values; when horizontally polarized, the head direction RCS average's variation is different in two bend fashions.

实验结果表明，垂直极化下头向雷达散射截面均值随弯度呈"W"形变化，有两个极小值；水平极化下两种弯折方式头向雷达散射截面均值变化趋势差异较大，上下弯折时呈"W"形变化，水平弯折时单调降低。

And can be cut, and a variety of materials, precision cutting demanding the ability to use pulse laser cutting die computer printer and the computer automatically scimitar machine, can be used in cutting die plus scimitar machine cutlasses, fast, and accurate.

并可切割多种材料，而且，对精度要求较高的切割，还可采用脉冲切割将激光模切版的电脑绘图机与电脑自动弯刀机连在一起，可在切割模切版的同时，用弯刀机弯刀，又快捷，又准确。

Its amount has relation with acting load. The influence on sectional curvature of bending components is the greatest one, the ultimate curvature of corroding section decrease obviously, and the sectional curvature increases rather sharply with the increase of rust rate during the process of corrosion. The anti-cracking capacity of prestressed bending R. C. components may be damage. For the convenience of engineering usage and damage evaluation of structure, this paper presents a concept of sectional damage coefficient on the foundation of experimental and treatment study.

试验与理论研究均表明，受压区钢筋锈蚀后对普通钢筋混凝土和预应力钢筋混凝土受弯构件的承载力影响均不大，但对构件的正常使用性能有较显著的影响，受压区钢筋锈蚀过程中，截面刚度有较显著的下降，挠度及受压区混凝土压应变随锈蚀量增加而增加，增加值与使用荷载大小有关；受弯构件的截面曲率所受影响最大，锈蚀后截面的极限曲率有明显的下降，在使用荷载作用下，截面曲率则随钢筋锈蚀量的增加而有较显著的增加；而预应力混凝土受弯构件的抗裂度会下降。

The company has three Large-Scale- Boxcar- Gate –Cold- Bending –Shapers and Chassis Summer Beam Cold Bending Shapers ,two chassis riveted joints production lines, one chassis spurts spreads production line. It also has great forging and stamping equipments, plate cutter, hydraulic press and sheet knee bend machine etc. In addition the company has the mold development equipment such as lathe, line cuts, digs bed and so on and has power which develop and produce kinds of truck using in agriculture ,light truck ,chassis of car. The sum of product is exceed 60,000 wraps in one year.

公司拥有大型车厢栏板冷弯成形机、底盘大梁冷弯成形机三台，二条底盘铆接生产线，一条底盘喷涂生产线，拥有大吨位冲床、剪板机、液压机和板料折弯机等锻压设备，及车床、线切割、刨床等模具开发设备，具备各类农用车、轻卡、汽车底盘的开发和生产能力，年生产能力逾六万台套。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。