Subjects: Mechanics >> Solid Mechanics submitted time 2020-10-13
Abstract： Based on Zhang-Yu's work, this paper analyzes the energy absorption capacity of the Caladine-English crooked plates energy absorber in detail. We used Maple software to write a general program for the Zhang-Yu energy absorber equation of the Caladine-English crooked plates energy absorber, and for the first time obtained the generalized coordinate (rotation angle) of the energy absorber over time. On this basis, a comparative study was made on the influence of different parameter changes on the energy absorption capacity of Caladine-English crooked plates energy absorber. In order to define the energy absorption factor, the energy absorption capacity of the structure was described. In order to better understand the effect of the movement of the energy absorber by parameter changes, we calculated the phase diagram of the energy absorber dynamics. After a lot of numerical simulations, it is found that the 4 crooked plates energy absorber should be a ``mass sensitive" type of energy absorber in terms of energy absorption capacity, which fully supports Zhang-Yu's conclusion: the Caladine-English crooked plates energy absorber is ``Mass sensitive" type energy absorber.
Peer Review Status:
Awaiting Review
Subjects: Civil Engineering and Building Construction >> Civil Construction Engineering submitted time 2017-11-06 Cooperative journals: 《土木建筑工程信息技术》
Abstract：文基于Revit管线批量自动标注的实际工程要求，将平行管线标注分为无变径标注和有变径标注两类，并且阐述了会导致管线发生变径的三种情况 针对不同的管线排布情况分别采用了相对应的管线自动标注方法。本文还提出了一种利用引垂线的方法解决了多变径平行管线批量标注问题 实验结果表明，该类方法可以快 速高效地对管线进行标注，与传统的标注方法相比，简化了操作，提高了标注效率，为以后二次开发提供了一定的经验。
Subjects: Materials Science >> Materials Science (General) submitted time 2017-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract：利用高温高压釜模拟井下高温高压环境，通过气、液相失重法、表面轮廓分析和形貌观察评价和研究TP140高强度套管钢与PTFE、HP13Cr及其自身构成的缝隙在模拟地层水中的腐蚀敏感性及缝隙腐蚀特征；并借助动电位极化测试和交流阻抗谱技术来对比不同结构缝隙在90℃模拟地层溶液中的电化学行为差异以揭示TP140钢在井下地层水环境中的缝隙腐蚀行为机制。结果表明：高强度套管钢TP140在井下地层水中具有较高的缝隙腐蚀敏感性；TP140所构成的3种结构缝隙在模拟地层水的液相中相比于气相呈现出更为严重的全面腐蚀损伤，其中TP140与HP13Cr构成的缝隙中腐蚀尤为严重，这归因于电偶促进作用的显著影响。
Subjects: Materials Science >> Materials Science (General) submitted time 2017-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract：摘要：综合运用动电位扫描极化曲线和动电位电化学阻抗谱研究了不同时效温度下AM355半奥氏体沉淀硬化不锈钢在3.5%（质量分数）NaCl溶液中的点蚀行为。极化曲线的结果表明，时效时间均为4h时，时效温度为350℃的点蚀电位Eb100最高，在动电位扫描极化曲线反向扫描过程中，均未出现保护电位EＰ，钢表面产生蚀孔后再钝化能力较差。DEIS结果反映了点蚀生长和发展过程中钝化膜结构的变化。分析可知，时效温度通过影响析出相和残余奥氏体含量影响钢的点蚀性能。
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