查询词典 pivot joints

The current research points out that for the CFCHS joints the linear extrapolation method can be used for chords,whereas the quadratic extrapolation method must be used for braces.The hot spot stress distributions on the CFCHS joints tend to be more uniform and their SCFs become smaller significantly,compared with the CHS joints.Axial tension on the brace puts the CFCHS joints at a disadvantage,which produces higher SCFs than axial compression.The effects of nondimensional geometric parameters β,τ and γ on SCFs of the chords of the CFCHS joints are basically the same as those of the CHS joints,but for the braces,there is a bit difference in the effects of parameters β,τ and γ between the two kinds of joints.Concrete has the function of improving the CFCHS joint rigidity and then decreasing SCFs which is expected to increase fatigue strength,but concrete strength grade does not exert significant influence on SCFs.

研究表明：CFCHS节点的热点应力，对主管可采用线性外推方法，对支管需采用二次外推方法；相比CHS节点，CFCHS节点的热点应力分布趋于均匀，SCF显著减小；CFCHS节点支管轴向受拉比受压不利，SCF增大；CFCHS节点几何参数β，τ，γ对主管SCF的影响效应与CHS节点基本一致，但是对支管SCF的影响效应与CHS节点有些差异；混凝土的作用主要是改善CFCHS节点刚度，从而降低SCF，并预期可提高疲劳强度，但混凝土自身强度等级的高低没有显著影响节点的SCF。

In the experimental study, 12 joints tests are completed, including 5 uniplanar X joints loaded with axial forces, 3 uniplanar X joints loaded with in-plane bending, 4 multiplanar XX-joints loaded with axial forces, with the emphasis on the influence of β and the existence of the out-of-plane braces, of which the multiplanar XX-joints tests is the first experiment project in china.

试验重点研究节点支主管宽度比β以及平面外支管荷载等因素对节点性能的影响，共进行了3个足尺方管平面X型受压节点，3个足尺方管平面X型受弯节点、2个方、圆管杂交平面X型受压节点和4个足尺方管空间XX型节点试验，其中方管空间XX型相贯节点试验是国内的首次试验。

4 Results of nondestructive test for weld joints shall be graded according to JB 4730. Following requirements shall be met: a For radial test, quality grade of radial transillumination can't be lower than Grade AB, and that of weld joints shall meet table 10; b For supersonic test, approval standard for weld joints are as follows: 1 For weld joints of 100% supersonic test, grade Ⅰ. 2 For weld joints of local supersonic test, grade Ⅱ. c For magnetic particle test and penetration test, grade Ⅰ.

7.5.4 管道焊接接头的无损检测应按 JB 4730 进行焊缝缺陷等级评定，并符合下列要求： a 射线检测时，射线透照质量等级不得低于 AB 级，焊接接头经射线检测后的合格等级应符合表 10 的规定； b 超声波检测时，管道焊接接头经检测后的合格标准如下： 1 规定进行 100%超声波检测的焊接接头 I 级合格； 2 局部进行超声波检测的焊接接头 II 级合格； c 磁粉检测和渗透检测的焊接接头 I 级合格。

The tests showed that the tension of each hoop cable and radial cable distributed unevenly under various working conditions,because of the friction between hoop cable and joints.Compared with the traditional joints,using new joints in structure could make the friction between hoop cable and joints reduce obviously,and friction loss on hoop cable at joints was small.

试验表明，由于环索与节点间存在摩擦，使得各工况下结构各圈环索和斜索张力分布不均匀；与传统节点相比，采用新型节点的结构环索与节点间的摩擦大幅降低，环索预应力损失较小，预应力传递效率更高。

In this paper, with an original designed tool and selected welding parameters, 2024-T4 aluminum alloy sheets were friction stir welded successfully. A series of weld experiments were performed; the microstructure and the mechanical properties of the joints were analyzed. The influences of the welding parameters upon the quality of the joints were studied. The optimized welding parameters window was obtained in which high quality joints can be made and the tensile strength of the optimized joints were more than 80% of that of parent metal. The residual stresses of FSW joints have been investigated by using the Hole-drilling method.

本文自主设计搅拌头，通过选择合适的工艺参数，成功实现了硬铝合金2024-T4板材搅拌摩擦焊接；通过对接头成形和微观组织的研究得到可以实现焊接的工艺参数范围和工艺参数对接头成形的影响规律，并结合接头力学性能研究形成了接头性能与工艺参数之间的关系，并据此建立了优化工艺参数窗口，优化工艺参数下接头的抗拉强度可达到母材的80%以上。

Pivot Table AutoFormat XL allows you to save pivot table formatting and to use it as a format template for your future pivot tables.

数据透视表自动xl让您保存数据透视表的格式和使用它作为一个格式模板为您未来的枢纽分析表。

Fianlly, if to examine Camarilla levels with Pivot Point levels in Forex, in our opinion, regular Pivot points have higher value, therefore, we see combining Camarilla trading with Forex Pivot points as a winning combination.

最后，如果检查，我们认为与支点在外汇水平卡玛利拉水平，定期枢轴点，具有较高的价值，所以，我们看到作为结合的组合卡玛利拉枢轴点与外汇交易。

This invention relates to a slider (11) for an optical data writing/reading apparatus (1), the slider carrying an optical lens (40) defining a focal point (42), the slider having a configuration such that, upon variation of the disk speed such as, for example, caused by a slider movement from an inner diameter to an outer diameter, the pitch angle varies owing to a pivot movement about a pivot axis which lies in a vertical plane through the focal point, the pivot axis preferably coinciding with the focal point.

本发明涉及用于光学数据写/读装置(1)的滑动器(11)，在该滑动器(11)上装有确定焦点(42)的光学透镜(40)，该滑动器具有这样一种结构，以便于在诸如滑动器从内径到外径运动造成盘速变化时，由于围绕位于经过焦点的垂直平面内的旋转轴的枢轴运动而改变倾斜角。

Full scale tests on Six CHS joints, including 2 K-joints, 3 KK-joints and 1 KKT-joints, used in roof structures of the palaestra in Chang sha is carried out in this dissertation.

本文对长沙贺龙体育场钢屋盖结构中的6个圆钢管相贯节点，其中包括2个K型节点、3个KK型节点和1个KKT型节点，进行了静力单调加载的足尺试验。

According to the practical engineering application, the reasonable effective lengths of compressed chords and braces are presented. In the end, the static behavior of multiplanar XX-joints are discussed, which used widely in practical engineering. An amount of joints with the variable joint parameters under lode-case are analyzed. Base on research achievement of uniplanar X-joints, a set of formula is proposed to predict the ultimate bearing capacity of multiplanar XX-joints, which are easy to understand in physical concept and simple in practice.

最后对实际工程中常用的空间XX 型节点进行了探讨，分析空间轴心受力XX 节点和空间平面内受弯XX 型节点的空间几何效应和空间荷载效应，进行大量系统的参数研究后，得到各自的效应系数，并且在矩形钢管混凝土桁架平面X型节点研究成果的基础上，给出了两种受力情况下节点的承载力计算公式，公式物理概念清晰、简单实用。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。