High‐deflection‐sensitivity CRTs with filled yoke

The trend towards slim CRTs requires deflection yokes (DYs) with an improved deflection sensitivity. We present a new method to improve the deflection sensitivity by 15–25% by filling the space between the ferrite core and deflection coils with a soft magnetic material. The effect was analyzed in terms of a simplified two‐dimensional model. These model calculations were confirmed by three‐dimensional simulations and by experiments on a DY design for the Philips 29‐in. Real Flat CRT.     

钢管混凝土结构的特点及其工程应用

介绍了钢管混凝土结构的特点、研究现状及其工程应用 ,探讨了钢管混凝土结构研究方向。     

几种Ni-Cr系热喷涂涂层的抗热腐蚀性能和结合强度

针对电站锅炉耐热钢管材(12Cr2MoWVTiB)在燃煤烟气下的热腐蚀机制,设计了几种Ni-Cr系涂层;对不同涂层结构和不同热喷涂工艺制备的涂层试样,进行了硫酸盐热腐蚀动力学对比试验.结果表明,等离子喷涂双层复合涂层具有最好的耐蚀性能;对等离子喷涂和线材火焰喷涂的两种Ni-Cr系涂层采用胶结拉伸法进行了结合强度对比试验,并分析了两种 Ni-Cr系涂层的横断面形貌,结果表明等离子喷涂双层复合涂层的缺陷和孔洞明显较少,结构较为致密,其结合强度远远高于线材火焰喷涂的单层Ni-Cr涂层.     

涡流检测技术在钢铁工业中的新应用

介绍了涡流检测技术在检测1000℃高温连铸板坯、不锈钢毛细管、直径小于1mm的钢丝在线检测及连铸结晶嚣液位测试等方面的最新进展情况。     

华能德州电厂6号汽轮机凝汽器冷却管振动测试分析

对华能德州电厂6号机组凝汽器冷却管的振动和应变测试分析表明，冷却管振动主要是由于凝汽器管束存在一个50Hz左右的固有振动频率，机组运行中来自转子的激振力使凝汽器管束产生结构共振所致。     

Heat transfer and thermal stress analysis in grooved tubes

Heat transfer and thermal stresses, induced by temperature differences in the internally grooved tubes of heat transfer equipment, have been analysed numerically. The analysis has been conducted for four different kinds of internally grooved tubes and three different mean inlet water velocities. Constant temperature was applied from the external surface of the tube. Energy and governing flow equations were solved using finite difference scheme. Finite element method (FEM) was used to compute the thermal stress fields. Grooving effects on the thermal stress ratio have been discussed. As a result, maximum thermal stress occurs in the case ofp =d for all water inlet velocities. The maximum thermal stress ratio positions inside the tube have been indicated as MX for all investigated cases. In the light of the thermal stress values, various designs can be applied to reduce thermal stress in grooved tubes.     

钛制换热器薄壁管与管板焊接优化工艺

针对钛设备制造中的特殊问题（如易于产生氢脆、裂纹、铁污染等），结合焊前试验及工程实践，着重分析了工业纯钛换热器制作中的关键环节——薄壁管与管板的焊接（焊接特性与工艺要点）。通过采取一些有针对性的技术措施，如施焊场地的精心准备、焊接方法及设备的合理选用、工艺参数的调整筛选等，从而取得较为满意的效果。     

Crashworthy characteristics of axially statically compressed thin-walled square CFRP composite tubes: experimental

In this paper the results of experimental works pertaining to the crash behaviour, collapse modes and crashworthiness characteristics of carbon fibre reinforced plastic (CFRP) tubes that were subjected to static axial compressive loading are presented in detail. The tested specimens were featured by a material combination of carbon fibres in the form of reinforcing woven fabric in thermosetting epoxy resin, and they were cut at various lengths from three CFRP tubes of the same square cross-section but different thickness, laminate stacking sequence and fibre volume content. CFRP tubes were compressed in a hydraulic press of 1000 kN loading capacity at very low-strain rate typical for static testing. The influence of the most important specimen geometric features such as the tube axial length, aspect ratio and wall thickness on the compressive response and collapse modes of the tested tubes is thoroughly analysed. In addition, the effect of the laminate material properties such as the fibre volume content and stacking sequence on the energy absorbing capability of the thin-wall tubes is also examined. Particular attention is paid on the analysis of the mechanics of the tube axial collapse modes from macroscopic and microscopic point of view, emphasizing on the mechanisms related to the crash energy absorption during the compression of the composite tubes.     

Numerical Simulation of Heat Transfer under Conditions of Turbulent Separated Flow in Tube Banks

The separated flow and heat transfer in an in-line bank of round tubes are calculated using a multiblock computational algorithm and the semi-empirical Menter and Spalart-Allmaras models of turbulence. An ingenious procedure is suggested for the correction of the mass-average temperature. Analysis is made of the effect of viscosity on the vortex structure and heat transfer from a remote cylinder within the bank.