小浪底水电站水轮发电机组原型效率试验

介绍了小浪底水电站1号机组现场效率试验的方案、试验参数测量方法,通过压力—时间法对蜗壳压差流量系数进行了率定,得到了水轮机绝对流量,实现了现场绝对效率的测量。实测得到的效率曲线和模型换算得到的效率曲线一致性较好,说明实测效率曲线的分布趋势真实反映了水轮机的能量特性。     

移动荷载下下卧基岩Gibson地基的动力响应

针对G ibson地基模型,研究了在移动荷载作用下土体的动力响应。基于弹性方程,通过傅立叶级数展开将偏微分方程转化成常微分方程求解,得出了下卧基岩G ibson地基在移动荷载作用下土体中各点的响应,并讨论了在参数变化时土体各点响应的变化。从分析结果来看,表面土体的剪切模量G0的增大、剪切模量变化率α的增大、荷载移动速度c的减小和层厚H的减小都使土体中各点的竖直方向位移减小,当层厚到一定厚度时,可以忽略下卧基岩的影响,简化为半空间模型来考虑。     

埋置点源简谐荷载作用下Gibson土体动力Green函数

采用Hankel积分变换方法,研究了Gibson地基在内源简谐荷载作用下的动力响应问题;通过构造积分围道技术,利用对围道上奇点的特殊处理,以消除驻波相来满足实际波的辐射条件,得到了Gibson地基埋置点源简谐荷载的动力Green函数。通过具体算例,分析了地基土体非均质性、荷载埋置深度和激振频率等因素对地基土体表面竖向位移的影响。结果显示:(1)荷载埋置深度和荷载激振频率对地基表面位移幅值大小和波动性都影响较大;(2)低频荷载作用下,地基土体的非均质性对其表面位移有较大影响。     

E. A. Bott: Another View.

Continues the tribute to Edward Alexander Bott with a conversation between C. R. Myers and David Gibson, Professor of Psychology at the University of Calgary. Gibson recounts his experiences as a student in one of Bott's courses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

(Science) Fiction,Ecophysical Apparatus and Skizoid Machines: Animism,Vitalism and Machinism as a Way to Rearticulate the Need to Confront the Unknown in a Contradictory Manner

François Roche of R&Sie(n) ruminates on the contradictory nature of the present: a time that is ‘vibrating’ while ultimately ‘lacking momentum’. Reclaiming ‘the scenarios and substances that condition architecture’, he rejects the large-scale flights of fancy of international signature architects and argues for the reactivation of ‘a throbbing, complex and unfinished “localism”’. In so doing, he advocates a machinism that enables fictionalisation and speculation. Copyright © 2010 John Wiley & Sons, Ltd.     

Digital Cottage Industries

Mike Aling 's ProunStretcher project engages with the recent global revival of cottage industries, fuelled by the application of digital technologies, as a means to address ‘the manifold social issues present across our rural landscape-as-urban-extension’.     

均质弹性地基的埋深基础沉降计算

首先分析了埋深基础的5个效应:Gibson效应、壕沟效应、边墙摩擦效应、挡土墙效应以及浮基效应;然后给出了简单实用的考虑埋深的基础沉降计算方法,最后对埋深折减系数进行讨论,得出了一些有意义的结论。     

广义Gibson地基上的路堤稳定性数值分析

介绍了广义Gibson地基上的路堤稳定性数值计算方法,通过大型有限元软件ABAQUS对其进行了分析,提出了广义Gib-son强度折减数值计算在ABAQUS中的实现途径,并对地基非均质性系数m取不同值进行数值计算分析,得到该地基上的路堤边坡稳定安全系数的变化规律,其分析结果对路堤边坡的设计具有指导意义。