SP预应力空心板在居住建筑中的应用和发展

分析现浇板和传统预制板的特点和弱点，提出发展SP板和SP叠合板是住宅实现大开间、灵活隔断的有效途径之一，也是建筑施工实现现代化的重要内容之一。     

国产核电厂蒸汽发生器下封头接管区模拟装置承受循环载荷能力的试验

国产核电厂蒸汽发生器下封头群孔接管区具有应力分布复杂、焊接施工条件差的特点。为考核其承受循环载荷的能力，设计制造了与实物相似的模拟试验装置，根据核电厂运行寿命期内的载荷特点，确定了模拟试验装置的试验载荷与试验循环数。循环加载试验的结果表明，蒸汽发生器下封头群孔接管区承受循环载荷的能力在寿命期内是符合要求的。     

液态挤压在铝合金减震筒上的应用：液态挤压比压值对制件性能影响的分析

指出了压力铸造及热挤压工艺生产铝合金减震筒的缺点，阐述了液态挤压的特征，介绍了液态挤压在减震筒上的应用，分析了比压值对制件性能的影响。     

试制STM-R80钻探用无缝钢管

采用42MnMo7、41MnV5钢锻坯,经热轧穿孔、冷拔加工,试制出STM-R80地质钻探管。该地质管经检验和使用,质量符合要求。介绍了钢的化学成分、试制的主要工艺过程及其参数。     

大型调压室的结构及其应力分析

结合某水电站大型预应力钢筋混凝土调压室的设计，本文进行了调压室井壁和底板的轴对称有限元计算，并讨论了并壁与底板的连接方式；为了研究塔壁扶壁处的局部应力分布，对塔壁进行了三维有限元分析。     

Effects of Working Fluid,Tubeside Enhancement and Bundle Depth on the Optimized Fin Geometry of a Horizontal Condenser Tube

A theoretical study has been made to optimize the fin geometry of a horizontal finned tube which is to be usedfor condensers that handle the vapor load of a liquid phase change cooling module.Systematic numerical calcu-lations of the vapor to coolant heat transfer have been performed for parametric values of fin height,fin spacing,vertical bundle depth and tubeside heat transfer coefficient.Three dielectric fluids (R-113,FC-72,and FC-87)at atmospheric pressure were selected as the working fluids.For a single tube with optimized fin geometry,theaverage heat flux increased in the order of FC-87,R-113 and FC-72.Both the optimum fin height and optimumfin spacing increased with increasing vertical bundle depth.     

Diffusion Behaviour of Fe-Cu Interface of Copper Brazed Double-wall Steel Tubes

By means of electron probe(EPMA),scanning electron microscope(SEM),and optical microscope(QM),the diffusion behaviour on the Fe-Cu interface of copper brazed double-wall steel tubes andthe microstructure of the diffusion layer have been investigated.There are three kinds of metallurgicalbonds between copper plating layer and steel substrate: (1)the Cu diffusing into steel substratealong grain boundary of ferrite;(2)the Cu diffusion into grain bulk of ferrite: (3)the Fe diffusing intoCu layer.The copper brazed double-wall steel tubes are formed by the combination of the diffusionsmentioned above and this is the reason for excellent mechanical and technological properties of thecopper brazed double-wall steel tubes.     

旋风管不同排尘结构内流场及颗粒浓度场分析

采用智能型五孔球探针测试技术及等动采样方法，对两种新型旋风管排尘结构内的流场及颗粒浓度场进行测量。通过大量实验，发现在双锥内部存在的二次流及涡流使得颗粒分布呈现横向返混状态，这不利于颗粒的分离，对单锥与双锥两种不同排尘结构内的流场及颗粒浓度场分布特点进行了对比研究，为进一步优化旋风管排尘结构，提高分离性能奠定了实验基础。     

Estimation of Load Capacity of Pipe Piles in Sand Based on Cone Penetration Test Results

Pipe piles can be classified as either closed- or open-ended piles. In the present paper, the load capacity of both closed- and open-ended piles is related to cone penetration resistance qc through an experimental program using calibration chamber model pile load tests and field pile load tests. A total of 36 calibration chamber pile load tests and two full-scale field pile load tests were analyzed. All the test piles were instrumented for separate measurement of each component of pile load capacity. Based on the test results, the normalized base resistance qb/qc was obtained as a function of the relative density DR for closed-ended piles, and of both the relative density DR and the incremental filling ratio (IFR) for open-ended piles. A relationship between the IFR and the relative density DR is proposed as a function of the pile diameter and driving depth. The relationship between IFR and DR allows the estimation of IFR and thus of the pile load capacity of open-ended piles at the design stage, before pile driving operations.