屈曲

V type composite insulator string, which has advantages of light weight, easy cleaning, high tensile strength and stable post buckling, is a key component of compact line.

V型合成绝缘子串是紧凑型线路的重要组成部分，具有重量轻、易清洗、抗拉强度高的优点以及稳定的后屈曲抗压能力。

Applying Visual Basic ,the paper make modes of buckling ,load calculating, rod designing , sinker bar and couplings designing to realize on computer. It provides effective means for analyzing sucker rod dynamic behavior and designing rod combination in casing production well.

利用VB把建立的屈曲分析、载荷计算、杆柱设计、加重杆和扶正器设计模型编制程序实现计算机计算，为套管采油井抽油杆柱的力学行为分析和设计提供有力工具。

Taking two wells of Caiyou Wuchang in Zhongyuan oil field , as examples ,H12-150 and H7-79, the paper applied the program to calculate rod load s and analyze buckling, what's more, it designed sinker bar with different diameter and corresponding sucker rod combination, finally couplings have being designed.

以中原油田采油五厂H12-150和H7-79两口井为实例，利用编制的程序进行杆柱载荷校核、屈曲分析，并设计不同尺寸的加重杆和相应的杆柱组合，以及设计扶正器和防脱器。

Shoulder angle in sagittal view was increase sustained, but elbow angle in sagittal view was from increase to decrease in second pull phase of snatch. This result indicated that the upper arm was leaving forward the trunk, and the movement of elbow was from extention to flexion, in second pull phase of snatch.

肩关节矢状面角度在发力过程中持续增加时，肘关节矢状面角度则是先增加而后减少，这意谓著参与者的上臂在发力的过程中是有向前逐渐偏离躯干的情况产生，并且肘部的动作是先伸展而后屈曲。

Structural steel shear walls, generally stiffened against buckling by a concrete overlay, have found application where shear loads are high.

剪力墙结构钢，一般加筋对屈曲的一个具体的覆盖，已发现的应用在剪切载荷是很高的。

By using a shooting method, the strongly nonlinear ordinary differential equations with two-point boundary conditions were solved and numerical solutions for thermal post-buckling and bending deformation of sandwich Timoshenko beam with pinned-pinned ends and subjected to transversely non-uniform temperature rising were obtained.

采用打靶法数值求解所得强非线性边值问题，获得两端不可移简支夹层梁在横向非均匀升温作用下的静态热过屈曲和热弯曲变形数值解。

Result:(1) The max supporting weight of saddle-backed waist splint is 90 kg in the bed exercise, applicable to people who have spine length 73cm~67cm( about body height 178cm~165cm)(2) the height of the gas filled pillow is 5cm~15cm (3) The height of the gas filled pillow should be adjusted according to different patient (4) the press on the abdomen deliver by front part of saddle-backed waist splint is 3336 kpa; Standard piece of waist line is 94cm~70cm, elastic force is 180N .

结果：﹙1﹚鞍式腰托在卧床锻炼时的最大承重量为90㎏，适用脊柱长度为 73 ㎝67 ㎝（约身高178 ㎝165 ㎝）。﹙2﹚充气垫枕的高度为5㎝15㎝。﹙3﹚针对不同病人的身高﹐应适当的调整充气垫枕的高度以及指导锻炼时的拉伸高度。﹙4﹚下地后鞍式腰托前板能给腹部压力为3336kpa；标准件的弹性腰围为64㎝ 90㎝﹑弹性力为180N。结论：鞍式腰托在通过力学测试以及临床应用﹐已基本符合脊柱胸腰段（T11L2）椎体屈曲型稳定性压缩骨折的复位要求，具有简便安全而有效的整复与固定作用。具有较强的实用性，值得进一步研究开发。

In this paper, finite element method is used to analyze the sinusoidal buckling of drill-strings with connectors in straight well bore. Three kinds of beam elements, one of them is a newly established transition element, are adopted in the finite element model.

本文运用有限元法分析了直井中考虑接头与井壁接触时钻柱的正弦屈曲，有限元模型采用三种不同类型的梁单元，其中一种是新建立的过渡单元。

According to the deformation modal of impact buckling, this paper establishes mode controlled equation on the basis of considering strain hardening and strain rate effect.

文章根据钢管受冲击屈曲变形模态，分析了应变强化和应变率效应对变形过程的影响，在此基础上建立了模态解控制方程。

Summary of Background Data. The effects of flexion and extension on spinal canal diameters and DCSA are well documented.

背景概述：屈曲和背伸体位对椎管直径和硬脊膜囊横断面积作用的研究较多。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。