浅谈英文图纸读图的一些关键点

根据作者英文图纸看图的一些经验及查阅有关资料,总结出了英文工程图纸读图的一些关键点。按照看图的顺序简要介绍了标题栏、表达方法、尺寸标注、技术要求、常见加工工艺看图的一些方法及常用词汇的中文翻译。为工程技术人员快速读懂英文图纸提供了参考。     

蓄电池常见充电方式比较与注意事项

在蓄电池使用中,充电是一项重要工作。在对蓄电池充电时,必须根据不同的情况选择适当的方式,才能延长蓄电池的使用寿命。本文通过对蓄电池几种常见充电方式特点的比较,论述了正确选取方法和使用注意事项。     

冲击压实技术在高填方路基中的应用

针对不同的土质状况,提出利用冲击压实技术处理地基沉降,并从施工工艺、压实度、碾压效果几方面进行分析介绍。     

RPS在车身精度设计上的应用

车身的尺寸、精度设计已经成为汽车制造技术的重要环节。阐述了当代车身精度设计的理念,采用并行工程,使精度质量体系贯穿设计、生产全过程。从RPS的组成人员、实施步骤和有关规则等方面,叙述了定位基准理论在车身精度设计上的应用,并以实例详细地介绍了在设计、生产中如何选取定位基准点和应用RPS。     

轻型车实际行驶污染物排放(RDE)试验方法概述

随着国家对汽车污染物的管控力度逐渐加强,GB 18352.6-2016《轻型汽车污染物排放限值及测量方法(中国第六阶段)》应运而生,且已经开始实施。标准中新增加的实际行驶污染物排放(RDE)试验要求也受到了广泛的关注,尤其是对于试验实施方法和路线选择的方法。本文主要通过多次RDE测试,总结出最优试验方案及路线选择方法,仅供参考。     

Dynamic response analysis of load transfer of topsides from T-barge onto twin-barge in floatover installation

The twin-barge floatover method is a promising approach in the topsides installation of the offshore platform. However, the topsides transfer onto the twin-barge is a challenging task and is seldom investigated. This study focuses on the floatover load transfer operation of the topsides onto the twin-barge by a T-shaped barge and investigates the dynamic responses of the three proximate barges in the operation. The floatover mating process was experimentally simulated by three representative intermediate stages, including 0%, 50%, and 100% stages. The barge and topsides motions, the relative motions of mating points, the contact loads on mating units, tether forces, and mooring forces at various environmental conditions were analyzed. The three floating barges experienced large surge drift motions as well as the sway and yaw drift motions in head seas because of the unsymmetrical configurations. Although a relative radial distance between mating points occurred and exceeded the capture radius of the mating unit at limited instants, the relative motions were to a great extent within the capture radius, indicating the feasibility of the twin-barge floatover method. Comparisons of the loads at the three stages show that the mating units and the tether lines were subjected to larger impact impulse loads at the 0% stage than the 100% stage.