综合信息

综合信息国家发布《外商投资产业指导目录》《指导目录》中涉及了建材、非金属矿制品业、电子和化工产业等。一、建材及非金属项目有１．日熔化５００吨级及以ｌ：浮法玻璃生产线；２．年产５０万件高档卫生瓷生产线；３．新型建筑材料；４．特种水泥；５．水泥外加剂；６...     

新型家用解冻—烤箱的研制

本文着重论述了新型家用解冻－烤箱热源选择，功率调节和加热时间的控制。通过研制和，证实新型解冻－烤箱质量稳定、可靠、可靠；解冻时间日本同类产品缩短２６．７％，省时省电；使用方便；成本低廉，在一般家庭中有广泛的应用前景。     

电子材料

欧司朗光电半导体计划扩充槟城工厂封装产能；OPTO科技公司推出新型紫外光LED；日亚化学筹建新厂；Cree与住友签署1．8亿美元的协议；宏齐（Harvatek）推出业内最薄的SMD LED。     

化工新型材料

蓝星将围绕南通打造国内环氧产业链基地；金发科技改性塑料新基地正式投产；华东理工大学研发出新型轨道垫片；阿克苏诺贝尔投资2．5亿欧元在中国增建化工厂；巴斯夫新工程塑料改性装置在上海投产。     

新型家用解冻—烤箱的研制

本文介绍了国内外解冻的研制现状，着重论述了新型家用解冻－烤箱热源选择，功率调节和加热时间的控制，通过研制和试验，证实新型解冻－烤箱解冻质量稳定，可靠；解冻时间比日本同类产品缩短２６．７％，省时省电；使用方便，成本低廉；兼作烘烤，在一般家庭中其广泛的应用前景。     

传感器专辑

奥地利E＋E益加义公司：EE32／33系列温湿度变送器；北京吉祥德尔格安全设备有限公司：德尔格Pac系列仪器；GE传感与测量：Humilab湿度发生器；上海韩荣电子有限公司：电感式接近开关；翘高国际发展有限公司：新型液位控制传感器NRGS15．1；     

国内外化学工业动态

罗地亚聚酰胺宣布提高其Technyl@聚酰胺6和6．6工程塑料价格；罗门哈斯推出新型添加剂，为绿色生物材料提供包装应用的解决方案；罗地亚聚酰胺宣布提高其STABAMID@聚酰胺66切片及聚酰胺66盐的价格；罗门哈斯宣布离子交换树脂提价；大豆价格持续走高迫使科聚亚提高其环氧大豆油价格；     

铝及其合金熔体的增黏及泡沫化特性

研究了纯铝、普通铝硅合金和新型多组元铝合金的增黏和泡沫化特性．这三者加入Ca增黏后的物相组成和发泡后的气泡壁微观组织以及三者熔体的表面张力．结果表明：Ca加入后，经过搅拌形成的大量弥散分布的细小Al-Ca中间化合物颗粒快速增加了纯铝以及新型多组元铝合金熔体的黏度，而Ca加入普通铝硅合金中与Si等元素形成较大的颗粒，因而增黏效果不如前两者；Ca的加入也显著降低新型多组元铝合金和纯铝熔体的表面张力，普通铝硅合金降低不多；在相同的表观黏度下，表面张力的差异是引起纯铝．普通铝硅合金、新型多组元铝合金等三种熔体泡沫化特性差异的主要原因．     

新型铝改性硅胶吸附材料的制备与性能

陶瓷纤维纸经水玻璃、酸性铝盐溶液顺次浸渍得到新型铝改性硅胶吸附材料．反应的优化条件为：水玻璃浓度26．6wt％、铝盐浓度10wt％、溶液pH值1．8．^29Si和^27AlMAS NMR谱显示：铝替代硅进入SiO4硅氧四面体结构单元，但并不影响其骨架结构；红外光谱显示Si—OH对称伸缩振动峰由968cm^-1移至Si(Al)-OH的954cm^-1；扫描电镜图表明铝改性硅胶能较好地分散在瓦楞陶瓷纤维表面及其孔隙中；X射线能谱(EDS)揭示材料表面微区Al^3 的存在与含量,孔隙分析显示材料起吸附作用的主要为中孔；由于铝离子改性，新型吸附材料的吸附性能、耐热性能及机械强度等均优于同等条件下反应生成的硅胶．     

供应商动态

西得乐推出ESL创新包装方案；Colder连接装置优化流体输送过程；新型软件加快视觉导引机器人的部署；第三届PET工业亚洲论坛即将举行；齐聚广州 共赴盛会；克朗斯2006年上半年续报佳音；达意隆与达利集团签订1．2亿元饮料设备供应合同；欧洲最大软包装企业GOGLIO入驻天津.[编者按]     

Erosion rate correlations of a pipe protruded in an abrupt pipe contraction

Erosion is one of the most serious problems in various gas and liquid flow passages such as flow in pipes, pumps, turbines, compressors and many other devices. Sand presence causes loss of pipe wall thickness that can lead to pipe erosion, frequent failures and loss of expensive production time. The importance of this problem is mainly due to many related engineering applications, viz. heat exchangers. In order to reduce the frequency of such pipe erosions, caps in the form of replaceable pipes are protruded in the sudden contraction regions which are exposed to most of the serious erosion rates. In the present work, numerical investigation of the erosion of a pipe protruded in a sudden contraction is presented. The turbulent, steady, 2-D axi-symmetric flow inside an axi-symmetric abrupt contraction pipe with a pipe protrusion embedded in it was solved by steady-state time averaged conservation equations of mass and momentum along with two equation model for turbulence. Particles are tracked using Lagrangian particle tracking. An erosion model was employed to investigate the erosion phenomena for the given geometry. The influence of the different parameters such as the inlet flow velocity (3–10 m/s), the particle diameter (10–400 μm), the protruded pipe geometry (thickness T=1–5 mm and depth H=2–5 mm) and the pipe contraction ratio (Cr=0.25–0.5) on the erosion of pipe protrusion was investigated. Correlations for the influence of inlet flow velocity, depth and thickness of the protruded pipe on the erosion rate are presented.     

XFEM fracture analysis of cracked pipeline with and without FRP composite repairs

Abstract

The effect of fiber reinforced polymer composite (FRPC) repair on crack propagation in thin-walled steel pipes is examined. The extended finite element method is used in this study to simulate a pressurized cylindrical pipe with longitudinal crack in two conditions: the original cracked pipe and the pipe repaired with a composite patch. Carbon/epoxy or E-glass/epoxy FRP in two different fiber orientations are assumed for cracked pipe repair. Performance of four types of FRP repair systems are investigated by CTOA, COD and COA fracture criteria for both the pipe integrity assessment and the potential age of leak before break criterion.     

半浮芯棒连轧管工艺过程的有限元模拟分析

连轧管工艺是无缝钢管生产的重要工艺之一,而半浮芯棒连轧管工艺代表现代无缝钢管生产的先进技术,也是当前的研究热点。为此,采用ANSYS/LS-DYNA软件对φ109mm×7mm规格6机架半浮芯棒连轧管工艺过程进行三维热固耦合有限元模拟分析。结果表明：钢管在第4号、第5号机位横截面总等效应力最大,在前3个机位发生的总等效形...     

测压管道系统频响函数及对风效应的影响

利用管道测压试验,确定不同长度测压管的频率响应函数。在此基础上,研究不考虑管道系统修正时,测压管道长度对平屋面风压系数和结构风振响应均方根和极值的影响规律。研究结果表明：短管对脉动风压有放大效应,长管则呈现缩小效应;当管道长度较大时,风压信号衰减十分显著,尤其在高频位置;管道长度对风振响应的影响小于屋面风压系数,误差影响规律差别较大;测压管道长度对风压系数和风振响应计算误差的影响呈现振荡特性,100cm左右管道长度引起的误差相对较小,对于大多数管道长度,均需要进行风压管道修正。     

在役管道支吊架状态异常对电厂安全运行的影响

介绍了管道支吊架的作用及状态异常的表现形式,阐述了支吊架状态异常对电厂运行带来的安全隐患,以引起发电企业对在役支吊架监督、检查及调整工作的重视.     

Interfacial debonding of pipe joints under torsion loads: a model for arbitrary nonlinear cohesive laws

Adhesively bonded pipe joints are extensively used in pipelines. In the present work, Cohesive Zone Model (CZM) based analytical solutions are obtained for the bonded pipe joints under torsion. An integral form based general expression is derived which is suitable for arbitrary type of nonlinear cohesive laws. The concept of the minimum interfacial cohesive shear slip δ _m is introduced and used in the fundamental expression of the external torsion load. It is found that, when the bond length of the pipe joint is large enough, the torsion load capacity is indeed independent of the shape of cohesive laws and the bond length. It is interesting to note that the maximum torsion load capacity is achieved when the torsion stiffness of the pipe and coupler are identical. A good agreement with finite element analysis (FEA) result indicates that the current model works well. The formulation to develop a simple test method for determining the τ–δ constitutive relationship in pipe joints under torsional loads is suggested. Parametric studies of various cohesive laws are conducted. This model deepens the understanding of the interfacial debonding problem of bonded joints. The fracture energy based formulas of the torsion load capacity derived in the present work can be directly used in the design of adhesively bonded pipe joints.     

Integrity assessment of a corroded API X70 pipe with a single defect by burst pressure analysis

Gas pipes invariably develop defects. Assessment and repairing methods vary depending on the defect type. When evaluating corrosion in the base metal of a pipe, the burst pressure is usually calculated using conventional evaluation equations, and the possibility of operating the pipe is determined. These equations are applied differently depending on the pipe's physical properties and environment. Therefore, in this study, the failure behavior and burst pressure of a pipe are determined through a full scale hydrostatic burst test; the results are used to simulate the lengths and depths of defects through the finite element method for the shapes and physical properties identical to those of a full-scale pipe. Thus, the corrosion in the base metal of an API X70 pipe was assessed by a stress-based method, and an evaluation equation suitable for use was proposed.     

On the dynamic behaviour of a long missile pipe after impact on a rigid target pipe

Two modes of deformation of a long missile pipe following an impact on a rigid target pipe of larger radius are analysed. It is assumed that the missile pipe can form either a ‘nutcracker’ type of mechanism or simply ‘wrap around’ the target pipe. The influence on the dynamic behaviour of the missile pipe of the parameters like the length, kinetic energy and the plastic moment of the missile pipe and the target pipe radius are discussed. A numerical procedure is presented to obtain the maximum force of interaction developed between the two pipes which also takes account of possible transition from a ‘nutcracker’ mode to the ‘wrap-around’ mode.     

无限介质包围的充液管道中导波的频散特性

利用波传播方法从理论上分析了无限介质包围的充液管道中导波的频散特性。基于经典的薄壳振动理论,求出了不同传输路径中的波数表达式,并利用数值方法对振动方程进行解析研究,分析管道参数和无限介质对导波频散特性的影响。结果表明,管道厚径比、管壁厚度、无限介质和管壁材料与导波频散密切相关。其中管道厚径比和管壁材料对流体主导波（s1波）频散的影响更大,管壁厚度和无限介质对管壁压缩波（s2波）频散的影响更大。通过仿真证实了无限介质对s2波频散的影响比对s1波更大。研究结果对于地埋管道的漏损检测具有一定的参考意义。