减缓轮轨摩擦的研究

介绍了用于润滑的减摩材料和喷射装置的研制情况,并通过试验进行了确认.     

Recent observations in the straits of the East/Japan Sea: A review of hydrography, currents and volume transports

Recent observations of hydrography, currents and volume transports in the straits of the East/Japan Sea are reviewed. It is newly found that bottom cold water in the Korea/Tsushima Strait originating from the northern region of the East/Japan Sea appears not only in summer and autumn but also in winter. Intensive observations in the Korea/Tsushima Strait revealed two distinct cores of northeastward currents in the upper layer of the western and eastern channels. Mean volume transport through the Korea/Tsushima Strait is calculated as 2.5 ± 0.5 Sv from four-year direct and indirect measurements. As continuous monitoring has started in the Tsugaru and Soya Straits, understanding of temporal variability of currents and volume transports through the straits is in progress. For the first time, simultaneous time series of volume transports are available in the Korea/Tsushima and Tsugaru Straits during the winter of 1999–2000. Ouflow through the Tsugaru Strait accounts for about 70% of inflow through the Korea/Tsushima Strait for this period.     

Circulation features in the Japan/East Sea related to statistically obtained wind patterns in the warm season

A response of the circulation in the Japan/East Sea (JES) to different kinds of wind forcing is studied, with the emphasis on the warm season, using a primitive equation oceanic model. Wind forcing is based on typical patterns obtained from complex empirical orthogonal functions of 1°-gridded NCEP/NCAR 6 h winds for 1998–2005. These patterns are distinguished by a prevailing wind direction. Northwestern wind and strong cyclonic (C) curl prevail in winter, while a variety of patterns occur in the warm season, differing in the wind direction and curl. Three model runs are performed to examine the circulation in response to a prevailing C wind stress curl or an alternating C and anticyclonic (AC) curl or a strong C curl in the warm season. The simulated features are consistent with the observational evidence, in particular with thermal fronts and frequent eddy locations derived from multi-year infrared satellite imagery. The simulated C circulation intensifies and the subarctic region extends southward with the strengthening of a summer C wind stress curl over the JES. Variability of Subarctic Front (SF) in the western JES (between 130°E and 133°E) is strongly affected by summer wind stress curl. Forcing by an AC curl tends to shift SF northward, while SF shifts to the south under the forcing by a C curl, reaching the southern Ulleung Basin in the case of the strong C curl. In the northwestern JES (off Peter the Great Bay, Russia, and North Korea), the SF northwestern branch (NWSF) is simulated. It is a known feature in autumn and early winter and can also occur in the warm season. The simulation results suggest an AC wind stress curl as the forcing of the formation of the NWSF in the warm season. The Siberia Seamount and sharply bending coastline near Peter the Great Bay facilitate partial separation of the Primorye (Liman) Current from the coast. The wind stress curl can be an additional forcing of the Tsushima Warm Current (TWC) branching off the Korea Strait to the East Korea Warm Current (EKWC) and the offshore branch (OB). In the warm season, the simulated TWC bifurcation occurs farther north, the EKWC is strong, and the OB is weak under the forcing of the AC wind stress curl. The EKWC is weak and the OB is strong under the forcing of the strong C wind stress curl.     

焊装手动线自动化柔性改造方案

焊装车间手动生产线工人较多,用工成本高,且零件焊接质量一致性受工人影响;本文介绍一种手动生产线利旧夹具改造为自动化柔性焊接岛的方案;改造后只需取放件工人,降低了人工成本并提高了焊接质量一致性.同时,焊接岛可多车型批量切换生产,并为后期升级预留接口.     

日本新干线驱动装置

介绍了为新干线N700系和E954型/E955型高速电动车组开发的2种驱动装置的结构特点。     

日本キハE130系普通型内燃动车组

介绍了JR东日本铁路公司最近研制成功并已投入运营的キハE130系普通型内燃动车组的结构及主要技术,并阐述了该动车组的设计理念及所采用的新技术、新装备。     

新干线Y型声屏障的降噪效果

介绍了在Y型形状基础上,组合吸声材料、声管制作的Y型声屏障的基本结构、隔声性能等,根据模型试验推断了其降噪效果。     

日本铁道车辆技术的开发动向

介绍最近日本铁道综合技术研究所在铁道车辆方面开发的几项成果,对提高铁道车辆的运行安全性和乘坐舒适度具有实用性。     

日常监控脱轨系数的方法

介绍了采用非接触式位移传感器代替测力轮对,测试脱轨系数的方法。     

车体抗侧向载荷强度评估

为了评估车体抗侧向载荷的强度,采用全尺寸部分车体进行静态、动态压缩试验,同时还进行了与经验性试验同样载荷工况下的有限元分析.在载荷-时间特性和车体变形模式方面,有限元数值分析结果和经验性结论一致.得出了一种利用有限元分析评价车体抗侧向载荷撞击变形特性的方法.