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文章介绍了B&W35MC主机水套漏水的发生以及解决过程。因主机水套漏水不仅给轮机部管理带来相当大的麻烦,而且容易导致机械设备甚至船舶更大的险情与事故发生。通过解剖水套漏水这起故障,其深刻的教训告诫我们:只有采取认真、细致和正确的工作态度,才能科学管理与维护机械设备。 相似文献
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M701F燃机燃烧系统简介 总被引:1,自引:0,他引:1
介绍三菱生产的M701F型重型燃气轮机燃烧系统的主要结构特点以及燃烧系统设置的主要保护。 相似文献
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傅雪军 《兰州交通大学学报》2008,27(1):138-140
针对TMS320F2812在外扩RAM的情况下,描述了其接线方法并给出了原理图,并从其存储空间来理解.cmd文件.在利用外扩RAM时(在non-DSP/BIOS工程中),举例说明了.cmd文件在flash上的分配方法. 相似文献
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FPSO开发与并行工程 总被引:1,自引:0,他引:1
本文初步探讨在FPSO开发中引入并行工程的概念。本文作者针对FPSO设计管理实际工作中遇到的几个突出问题,进行了分析和思考,发现传统的设计程序和管理模式与FPSO开发设计工作的特性不相协调,其结果是:虽然大家都在努力工作,但效果仍不令人满意。本文试图用并行工程概念为设计管理模式的改革提出一种肤浅的设想。 相似文献
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S500MC钢板斜Y型坡口焊接试验分析 总被引:1,自引:1,他引:0
S500MC材料是随着引进法国ALSTOM公司的相关技术而引进来的新材料,由于其高强度、高韧性、低含碳量等特点,使它成为适合机车转向架构架轻量化、高强度设计要求的理想材料。本文通过2种不同填充材料的斜Y型坡口试验对其冷裂性能进行检测。试验结果表明。试验选用的焊接填充材料和焊接工艺合理,其可焊接性良好,冷裂敏感性低。 相似文献
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The sediment transport processes in the south-western Baltic Sea are predicted by means of a numerical model in the project DYNAS. There are two sediment parameters that influence the results of modelling remarkably: critical shear stress velocity and bottom roughness. This paper presents the way how to parameterise these factors and extrapolate them into the investigation area. The critical shear stress velocity is parameterised basing on grain size data, combining approximations after Hjulström [Hjulström, F., 1935: Studies in the morphological activity of rivers as illustrated by the river Fyris. Geological Institution of University of Uppsala: Bulletin (25): 221–528.], Shields [Shields, A., 1936: Anwendung der Ähnlichkeits-Mechanik und der Turbulenzforschung auf die Geschiebebewegung. Mitteilungen der Preussischen Versuchsanstalt für Wasserbau und Schiffahrt (26): 26 pp.] and Bohling [Bohling, B., 2003: Untersuchungen zur Mobilität natürlicher und anthropogener Sedimente in der Mecklenburger Bucht. unpublished doctoral thesis, Mathematisch-Naturwissenschaftliche Fakultät, Ernst-Moritz-Arndt-Universität Greifswald/Germany, 156 pp.]. The roughness length, in the case of absence of macro zoo-benthos and their structures, is parameterised basing on grain size too employing Soulsby [Soulsby, R.L., 1997: Dynamics of Marine Sands: a Manual for Practical Applications. London, Thomas Telford Publications. 249 pp.], Nielsen [Nielsen, P., 1983: Analytical determination of nearshore wave height variation due to refraction shoaling and friction. Coastal Engineering 7, 233–251.] and Yalin [Yalin, M.S., 1977: Mechanics of Sediment Transport. Pergamon Press, New York. 298 pp.]. No equivalent simple parameterisations for biologically caused bed roughness exist. Here, findings of Friedrichs [Friedrichs, M., 2004: Flow-induced effects of macro zoo-benthic structures on the near-bed sediment transport. Dissertation, Universität Rostock, 80 S.] and estimations by the DYNAS biologists group were combined in order to derive roughness lengths from abundance measurements of four previously selected key species which represent the originators of the dominating benthic structures at the sea floor in the south-western Baltic Sea. Critical shear stress velocity and bed roughness are known at few sample sites only. They were extrapolated into the larger investigation area using a proxy-target concept. The mean near bottom milieu (bathymetry, median grain size, salinity, oxygen) which was derived using results from numerical modelling serves as the proxy. Since the milieu parameters are measured at the sampling sites for which the target parameters have been determined, a combined hierarchical and supervised classification was employed to transfer the local knowledge into the unknown investigation area. 相似文献
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在介绍Rogowski线圈光电式电流互感器基本原理的基础上,设计了一种基于电N/N率(V/F),频率/电压(F/V)转换原理的光纤隔离变换器,实现了互感器高压端与低压端的电气隔离。论述了电路的结构、工作原理、硬件设计等,并通过实验进一步阐明光纤隔离变换器的工作原理。现场实验表明,该光线隔离变换器具有良好的线性度,传输精度高,工作稳定。 相似文献