上海创意合金工厂1号楼2号楼中央空调工程设计

本文介绍了上海创意合金工厂的空调设计情况,简要介绍了格力数码多联空调的选型配置和管路连接的几个要点,以及新风的选择,最后探讨了数码涡旋中央空调的优越性。     

压风排粉技术在松软、薄煤层施工抽放钻孔中的应用

通过对在松软、薄煤层施工本煤层抽放钻孔的研究分析,详细介绍了该技术的施工方法,为该技术在我国薄煤层地质条件下推广应用提供了可靠的依据。     

国家体育场多目标等效静风荷载

针对大跨结构的风振响应特点，研究多目标等效静风荷载的分析方法，并采用该方法对国家体育场等效静风荷载进行了研究。该等效静风荷载分析方法的基本过程是:根据结构风振响应特性，选择风荷载的主要本征模态和结构主导振型惯性力作为构造多目标等效静风荷载的基本向量，根据最小二乘法，得到基本向量的最优组合系数，从而得到针对多个等效目标的等效静风荷载。国家体育场的分析结果表明:在所有风向下的风振响应中，背景响应远大于共振响应，其中0°风向和270°风向对结构最为不利；在针对多等效目标的等效静风荷载作用下，所有关键位置的节点位移响应和支座反力都与实际动力响应极值吻合较好。     

风电机组模型及其在低电压穿越过程中的有效性认证

介绍风电机组模型有效性研究的最新发展、认证过程和评价指标,以及机组模型的分类、组成和要求,并且对机组模型的发展方向以及测试和评价方法的发展方向提出了看法。     

Control of interior surface materials for speech privacy in high‐speed train cabins

The effect of interior materials with various absorption coefficients on speech privacy was investigated in a 1:10 scale model of one high‐speed train cabin geometry. The speech transmission index (STI) and privacy distance (r_P) were measured in the train cabin to quantify speech privacy. Measurement cases were selected for the ceiling, sidewall, and front and back walls and were classified as high‐, medium‐ and low‐absorption coefficient cases. Interior materials with high absorption coefficients yielded a low r_P, and the ceiling had the largest impact on both the STI and r_P among the interior elements. Combinations of the three cases were measured, and the maximum reduction in r_P by the absorptive surfaces was 2.4 m, which exceeds the space between two rows of chairs in the high‐speed train. Additionally, the contribution of the interior elements to speech privacy was analyzed using recorded impulse responses and a multiple regression model for r_P using the equivalent absorption area. The analysis confirmed that the ceiling was the most important interior element for improving speech privacy. These results can be used to find the relative decrease in r_P in the acoustic design of interior materials to improve speech privacy in train cabins.     

多功能旅行箱的设计

针对运输高峰期旅客候车或在列车上长时间无座站立的情况,设计了一种多功能旅行箱,既可作为旅行箱使用,也可当需要时变换为凳子,以缓解因站立给人身心带来的疲惫。文中详细描述了该旅行箱的结构及使用方法,该产品具有结构简单、携带方便、功能多、成本低、易推广等特点。     

Interdisciplinary safety analysis of complex socio-technological systems based on the functional resonance accident model: An application to railway trafficsupervision

This paper presents an application of functional resonance accident models (FRAM) for the safety analysis of complex socio-technological systems, i.e. systems which include not only technological, but also human and organizational components. The supervision of certain industrial domains provides a good example of such systems, because although more and more actions for piloting installations are now automatized, there always remains a decision level (at least in the management of degraded modes) involving human behavior and organizations. The field of application of the study presented here is railway traffic supervision, using modern automatic train supervision (ATS) systems. Examples taken from railway traffic supervision illustrate the principal advantage of FRAM in comparison to classical safety analysis models, i.e. their ability to take into account technical as well as human and organizational aspects within a single model, thus allowing a true multidisciplinary cooperation between specialists from the different domains involved.A FRAM analysis is used to interpret experimental results obtained from a real ATS system linked to a railway simulator that places operators (experimental subjects) in simulated situations involving incidents. The first results show a significant dispersion in performances among different operators when detecting incidents. Some subsequent work in progress aims to make these “performance conditions” more homogeneous, mainly by ergonomic modifications. It is clear that the current human-machine interface (HMI) in ATS systems (a legacy of past technologies that used LED displays) has reached its limits and needs to be improved, for example, by highlighting the most pertinent information for a given situation (and, conversely, by removing irrelevant information likely to distract operators).     

铁路客运专线连续梁上跨公路桥施工技术

结合具体工程实例,通过对跨桥施工方案的比选和计算,确定了墩梁式的支撑结构形式,并介绍了客运专线上跨公路桥的施工工艺,可为同类工程施工提供参考和借鉴。     

浅谈1500kW风电机组运行规程的编制

针对不同厂家设备的技术要求差异,对1500kW风电机组运行规程进行规范化编制,达到提高安全生产监控能力和机组运行可靠性的目的。     

循环水泵节能改造与应用

水泵流量、扬程和功率分别与其转速的一次方、二次方和三次方成正比。对于流量经常变化的场合,采用变频调速技术,控制电机转速,改变泵的流量和扬程,可节约电能50%,显著降低节流损耗,且生产工艺稳定,具有调速性能好、节能效果显著、运行工艺安全可靠等优点。根据运行参数,输送同等流量的水,减少压头损失40m,电流降低约40A,节约用电14kW.h,按目前工业电价0.67元/kW.h计,每年产生直接经济效益8万余元。叶轮切割也是常用的节能技术之一,其技术实施要满足三个条件:水泵实际循环流量满足系统需求,水泵铭牌扬程高于实际扬程5m以上;水泵在装置内所有循环系统主支路调节阀全开时,循环水泵的运行电流超过额定电流;能够降低装置循环系统的阻力。应用叶轮切割技术后,单台水泵工作电流由32A降至30A,一年节电68590kW.h。