Xsteel在钢结构节点板下料中的应用

在钢结构施工过程中,尤其是复杂钢结构工程,其各个构件的连接节点,如梁柱、梁梁等节点数量多、种类繁杂,导致了传统的人工方法统计节点板规格数量再排版下料不仅工作量大,还容易出错。本文通过利用Xsteel14.0板材套料功能实现对钢结构施工过程中节点板的计算机统计、排版、出图,并结合人工审核的方法来提高材料利用率和下料准确率,进而节约施工成本和提高施工质量。

双循环流化床提升管中气固流动特性及接触效率研究

以催化裂化平衡剂和常温空气为介质,在新型双循环流化床冷态模拟装置上,考察了单、双侧下料结构、双路循环颗粒循环速率比例对提升管内气固流动状态的影响,并提出了一种新的气固接触效率的概念。结果表明:单、双侧下料结构的不同对提升管内颗粒浓度的分布影响不大,其差异主要体现在提升管预提升区和底部反应区;双侧下料时的颗粒浓度径向分布均匀性明显优于单侧下料,且两路颗粒循环速率越接近,颗粒浓度径向分布越均匀,轴对称性越好,气固接触效率越高;降低表观气速或增大颗粒循环速率均有利于提高气固接触效率。

On the Porosity of Au and Ag Coatings Formed in Earth-Based and Space Conditions

It has been accomplished comparative survey of the structure, substructure and submicro porosity of coatings of fine metals with face-centered cubic lattice Au and Ag being condensed in both conditions of space flights of orbital stations and earth-based conditions. Urgency of such surveys are concerned with the necessity of settling the issues of creation of the advanced technologies for developing and recovery of different coatings-thermostatic, protective, optical etc. in space-based conditions.