外海开敞式码头施工中钢管桩防腐涂层的保护措施

阐述在实际沉桩中避免钢管桩防腐涂层破坏而加强涂层保护的一些可行性方法。     

汽车轮毂油封的开发

轮边减速桥已经得到广泛的应用,但轮毂油封仍采用普通油封的结构形式,造成密封效果差,使用寿命低,一但漏油将影响制动性能。新研制的FKM材料组合式油封产品具有较好的密封性能和较高的可靠性能,在耐温、耐磨、耐油等方面都得到很大的提高,其台架试验寿命高达1 634 h。该研究成果已经应用在轮边行星齿轮减速装置上。     

提高稀浆封层质量的几个措施

叙速了作为预防性养护的稀浆封层对路面强度、稳定度和平整度的要求．并介绍了提高稀浆封层质量应采取的几个措施。     

乳化沥青稀浆封层在路面预防性养护中的应用

路面预防性养护是公路养护的一种新的理念,道路沥青砼面层早期病害是公路中常见的一种现象。对于处理早期病害的措施,改性乳化沥青稀浆封层技术能很好的处理各种中、轻度裂缝和车辙等问题。具有良好的经济效益和社会效益。     

The importance of polynyas, ice edges, and leads to marine mammals and birds

The correlation between areas of open water in ice-covered seas and increased biological productivity has been noted for some time. To date, most attention has been focused on larger polynyas, such as the Northeast Water and the Northwater. Although spectacular in their own right, these large polynyas represent only part of a vitally important continuum of biological productivity that varies significantly between geographic areas and ice habitats, that includes the multi-year pack of the polar ocean and small localized polynyas in annual ice. Surveys of the distribution and abundance of ringed seals in the Canadian Arctic Archipelago have shown differences in density that are correlated with the presence or absence of polynyas. There is also significant variation in the biological productivity of polynya areas of the Canadian High Arctic Archipelago and northern Greenland, all of which receive inflow from the polar basin. Long-term studies of polar bears and ringed seals in western Hudson Bay and the eastern Beaufort Sea show significant but dissimilar patterns of change in condition and reproductive rates between the two regions and suggest that fundamentally different climatic or oceanographic processes may be involved. Projections of climate models suggest that, if warming occurs, then the extent of ice cover in Hudson Bay may be among the first things affected. Long-term studies of polar bears and ringed seals in the eastern Beaufort Sea and Hudson Bay would suggest these two species to be suitable indicators of significant climatic or oceanographic changes in the marine ecosystem.     

地铁轨道密封装置设计与运用

介绍了地铁轨道密封装置的设计方车、构胶材料的选取、机械构件的设计和工作厚理等,并结合有限元计算对地铁轨道密闭装置的密闭效果进行分析。该装置保证了地铁区间防护单元中密封装置密封性能的可靠性和安全性,有效解决了地铁轨道区间设防的难题。目前该轨道密封装置已用于工程实践。     

某型地铁车辆用带轴承座的传动齿轮箱

文章介绍了一种自主研发的带有轴承座结构的齿轮箱,并对其结构布置、齿轮设计、强度分析、润滑与密封系统等进行了详细分析。结果表明,自主研制的地铁车辆用齿轮箱性能完全符合我国城市轨道交通的运用要求,可广泛应用于我国地铁车辆。     

轨道交通装备空气管路用管接头设计探讨

文章介绍几种常用的轨道交通装备空气管路用管接头的结构形式工作原理,分析其密封性能,连接强度,安装方便性及重复安装性,提出系统性的轨道交通装备空气管路用管接头的设计选型建议。     

电控高压共轨喷油器密封件可靠性分析

利用有限元技术对一种自行设计的电控高压共轨喷油器的密封件进行了强度和可靠性的计算与分析.结果表明,密封件的密封性能取决于燃油压力、密封件自身的材料物理性能、喷油器体与栓塞套间的径向间隙及两者间的偏心度,其中以燃油压力最为重要.     

水泥土搅拌桩在软弱地基处理中的应用

介绍了水泥土搅拌桩加固软弱地基的原理、适用条件、设计计算与施工，对于利用水泥土搅拌桩加固桥涵基础及软弱路堤有一定的借鉴作用。