方形管

用非线性有限元的方法研究准静态加筋方形管压溃破坏中加强筋的影响

Effect of stiffeners on quasi-static crushing of stiffened square tube with nonlinear finite element method

本文针对方形管切割加工特点提出了数控切割方案，对方形管变形误差进行了分析，说明了检测和补偿原理并详细论述了PMAC运动控制器在方管相贯端头数控切割加工中的应用。

This paper advances a numerical control cutting method of quadrate pipe , analyzes its shape error , illuminates the principle of measure and compensation and introduces the use of PMAC motion controller in CNC cutting intersecting end of quadrate pipe .

数控切割高精度方形管相贯端头的研究

Research of CNC cutting high precision intersecting end of quadrate pipe

方形管内楔形障碍物对火焰结构与传播的影响

Effects of a wedge obstacle on flame propagation and its structure

冷弯方形管桁架梁焊接工艺和质量控制

Welding process and quality control of trussed beam with cold formed square hollow section

水平方形管进口区域单面冷却凝结换热

Condensation in entrance region of rectangular horizontal channel

邱和思门（1971）研究了在圆管和方形管中输沙时具有螺旋运动的水流的水头损失问题。

Chiu and Seman ( 1971 ) studied the head loss of flows transporting sediment in circular and square pipes with spiraling motion .

本文用非线性有限元方法研究了准静态条件下纵向和横向加强筋对加筋方形管压溃破坏的影响。

The effects of longitudinal and transverse stiffeners on quasi-static crushing of stiffened square tubes are studied with the nonlinear finite element method .

随着方形管应用的日益广泛，迫切需要能对此类工件进行高效率、高质量自动化切割加工的设备。

With the quadrate pipe getting more and more use , it 's crying for a kind of roboticized equipment to cut such kind of workpiece in high efficiency and quality .

方形截面管横向裂纹的应力强度因子KI

Stress intensity factor K _ I for cracked box beams

船用锅炉方形翅片管经济器的试验与应用

Experimental and Applied Research of the Square Finned-tube Economizer of a Marine Boiler

方形斜管特性参数值的计算

Calculation of the Characteristic Parameters of Square Pipe

最后给出了一个方形扭曲管的复速度势计算实例。

Complex Numbers Finally , we give as an example the calculation of complex velocity potential for a twisted duct with square cross-section .

本文介绍了一种求解方形截面管情况下参数D的差分方法。

A sort of difference method to solve the parameter in the equations of tube bundle with square section is presented in the paper .

在传热风洞试验台上，采用恒壁温方法，对4排4列共16根方形翅片管组成的管束空气侧流动阻力与传热性进行了试验研究。

Air flow and heat transfer over a 4 row , rectangular , finned tube economizer are investigated in a wind rig by experimental methods of keeping wall temperatures constant .

在充满甲烷-空气预混气的方形燃烧管内，对火焰穿过回形障碍物的情形进行了实验研究，拍摄到了障碍物附近流场的时序阴影照片。

Experimental investigations on the propagation process of the flame through a square - hole obstacle were performed in a rectangular - section tube filled with premixed methane - air gas .

给出了方形截面管裂纹张开能量释放率的G-积分表征，以及和应力强度因子的关系。

Unlike the classical crack extension energy release rate , the crack surface widening energy release rate is expressed by the G-integral and elementary strength theory of materials for slender cracked structures .

针对方形翅片管加工特点，确定了翅片翻边的相关工艺尺寸，提出了套片式翅片管的热套工艺方案。

The relative sizes of the turn down rims of the fins were determined for the processing characteristics of square finned tubes , the shrink fit technology program of the casing fin tubes was proposed .