弧焊机器人用数控焊接变位机示教系统的设计与实现

采用微型计算机控制技术,设计实现了任意位置定位的数控焊接变位机的示教系统.通过示教盒上的键控、液晶显示和通讯等功能,实现了人机交互的功能;在Ms-dos操作系统下、TC3.0环境中,主控计算机实现了对变位机旋转、倾斜等四个方向的位置控制,高、中、低速控制及停止、记忆、结束等功能.通过试验证明本示教系统的功能达到了预期的设计要求,可完成优质高效的焊接过程.     

箱体结构的声固耦合有限元分析

基于声学有限元法和声固耦合理论,建立了箱体结构的有限元模型,采用有限元AN-SYS软件,针对不同厚度的壁板以及不同位置的加筋处理两种情况,对箱体结构振动与内部噪声进行了分析研究,确定部分结构参数的改变对箱体内部噪声的影响规律.     

液压升降式钢坯托出机研制

针对现有凸轮式钢坯托,出机起升冲击大、设备占地空间大,拖出和起升不同规格的钢板的调整灵敏度不高等问题,我公司在中板厂和国内其他冶金企业的钢坯托出设备的基础上研制开发了液压升降式钢坯托出机,它具有占地空间小、维修方便、操作简便、定位准确等显著特点,并且采用了许多新技术,是当前国内应用情况最好的的钢坯托出设备。     

Effect of the moment transfer efficiency of a beam web on deformation capacity at box column-to-H beam connections

This paper investigates the effect of moment transfer efficiency of a beam web on deformation capacity at beam-to-column connections. Non-linear finite element analysis of five connection models was conducted. Analytical results showed that the moment transfer efficiency of the connection with a box column was poor when compared to a connection with an H-column; this was due to the out-of-plane deformation of the column flange. Based on previous test data, analytical results were compared with experimental results. Analytical and experimental results showed that the deformation capacity of the connection with a box column decreased due to the poor moment transfer efficiency of a beam web, followed by strain concentration at the beam flange.     

梁的悬臂法施工(四)

4)挂篮悬臂现浇 挂篮悬臂现浇梁段为15～27共13个梁段。(1)在挂篮悬浇5号箱梁后做临时固结。(2)活动支架上浇注12号箱梁，挂篮现浇16号     

框架结构-箱形基础-地基土共同作用分析

采用空间有限元法 ,对框架结构 箱形基础和地基土的共同作用原理和性状进行了探讨和分析。空间框架采用考虑剪切变形的空间杆单元 ,箱形基础采用平板形壳体单元 ,地基采用改进的有限压缩层地基模型、运用程序 ,针对一典型算例进行了分析 ,并得出了一些对工程实践有益的结论。     

箱变坐标系与多元储量计算积分法要点简介

本文简要介绍了作为多元储量计算积分法算法依据的箱变坐标系、变值函数等新型数学方法和二元线性类单元层的基本算法，并对其它多元类算法作了简要提示。本法算法精确、用法简便，适用于一般矿产的各类储量计算和矿山设计、生产与科研及矿业管理中的各类有关问题，更可作为一种基本数学工具广泛用于解决其它行业和领域中的各类有关问题。     

生产环境下变速器壳体号码图象自动识别预处理算法

论述了汽车变速器壳体号码识别中的预处理过程。提出了适应生产现场的预处理流程及其衡量各环节中各算法好坏的评判依据。并为各预处理环节确定了较为实用的算法。     

橡胶干燥箱结构的改进

分析了橡胶装置干燥箱结构上存在的问题 ,提出了相应的改进方案。     

Aerodynamic investigations for the tender design concepts of the Øresund cable-stayed bridge

For the Øresund link project two alternative tender designs were proposed, one single-level box girder solution and a double-level truss girder solution. Aerodynamic investigations, comprising wind tunnel section model tests as well as full-scale predictions, were carried out for the cable-stayed part of the two design alternatives. The section model tests covered static and dynamic tests for various configurations of bridge deck equipment, aiming at the detection of possible instabilities or vortex shedding effects and recording of the buffeting response. Cross-sectional admittance functions and aerodynamic derivatives have been estimated, and employed for full-scale predictions of dynamic displacements at a chosen value of the characteristic mean wind speed.