轮胎材料分布图精确复原方法研究

研究轮胎材料分布图精确复原方法。通过在轮胎内侧填充具有"流-固"态变化特性的流体材料,如环氧树脂硬胶,保持胎里轮廓形状,将轮胎与填充体共同切割,避免了轮胎切片后内应力释放造成的形变,保证断面上各个部件的尺寸、形状与完整轮胎真实状态一致。对填充固化材料的轮胎切片断面进行三维激光扫描仪扫描获得精确的轮胎内外轮廓,在此基础上复原出比较精确的轮胎材料分布图,用于建立有限元仿真计算的几何模型,对195/65R15轮胎进行有限元仿真分析,结果表明轮胎充气外缘尺寸的仿真精度较高,仿真得到的轮胎轮廓与轮胎真实轮廓吻合度非常高,仿真得到的轮胎接地印痕形状与试验测得的轮胎接地印痕形状吻合度较高。     

高强型高模量低收缩聚酯帘线性能的研究

研究高强型高模量低收缩聚酯帘线的性能。结果表明：与第2代高模量低收缩聚酯帘线相比，第3代高强型高模量低收缩聚酯浸胶帘线模拟硫化及耐疲劳试验后的断裂强力提高，定负荷伸长率略低，耐疲劳性能提高，其他性能相当。     

压力管道安全阀的选用

简述了压力管道用安全阀的分类及选择,通过实例介绍如何选用安全阀。     

Mineralization of Para-Chlorobenzoic Acid in Water by Cobalt-Incorporated MCM-41 Catalyzed Ozonation

Cobalt-incorporated MCM-41(Co-MCM-41) was used as a heterogeneous catalyst for the ozonation of para-chlorobenzoic acid (p-CBA) in aqueous solution. Cobalt oxide supported on MCM-41(Co/MCM-41) was synthesized for comparison. Their textural properties were elucidated by various characterization techniques to understand the relationship between surface texture and catalytic activity. TOC removal at 60 min reached 91% with Co-MCM-41, 83% with Co/MCM-41 and only 52% with ozone alone, respectively. Observations from diffuse reflection spectroscopy demonstrated that different metal phases were formed in these cobalt-modified molecular sieves samples. Radical scavenger experiments indicated the formation of hydroxyl radicals that were responsible for the effective degradation of p-CBA. An integrated approach to the catalytic mechanism was proposed by considering the variation of pH in the course of ozonation as well as its subsequent influence on the dissociation of targeted compounds and surface charge of the catalyst. In the reusability experiments, the reused Co-MCM-41 was able to regain the same catalytic capability as the fresh one within 5 cycles. X-ray photoelectron spectroscopy results indicated that a part of Co²⁺ was oxidized to Co³⁺ after oxidation reaction.     

聚酯帘线的发展趋势

从聚酯的结构设计、帘线浸胶工艺和在轮胎中的应用3个方面阐述聚酯结构特点与产品性能的关系。聚酯帘线行业应该密切关注汽车行业的发展态势,把握市场先机,进一步发展壮大;在新能源汽车逆势增长的形势下,高性能聚酯帘线需求量较大,帘线企业应拓展高性能聚酯帘线在轮胎冠带层、带束层和胎体等部件中的应用,同时联合轮胎企业开发特种聚酯材料和混纺材料等新产品。     

WIRELESS BODY-AREA NETWORKS

The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless person-     

不同流固耦合方法进行轮胎滑水性能仿真研究的对比分析

对比不同流固耦合方法对轮胎滑水性能进行仿真分析的结果。在Workbench平台中分别采用单向、双向流固耦合方法，对轮胎滑水模型在相同工况下的胎面动水压力分布和轮胎变形进行计算，并将两种方法仿真预测的临界滑水速度与经验公式计算值进行比对。结果表明，相对于单向流固耦合方法，双向流固耦合方法计算的相同时刻的动水压力峰值和轮胎变形量峰值较低，压力分布更均匀，临界滑水速度精确度较高，表明双向流固耦合方法更适用于轮胎滑水性能仿真研究。     

强碱三元复合驱色谱分离及其影响因素——以大庆油区喇嘛甸油田为例

三元复合驱油体系中驱油剂的协同效应,会使油水间的界面张力大幅度下降,原油采收率大幅度提高;但三元复合驱油体系的色谱分离现象也会破坏其协同效应和完整性,揭示色谱分离现象及其影响因素对于改善三元复合驱油效果具有十分重要意义。以油藏工程和分析化学理论为指导,以化学分析和物理模拟为技术途径,并以大庆喇嘛甸油田典型区块地质特征和流体性质为研究对象,开展强碱三元复合驱色谱分离现象及其影响因素研究。结果表明,采用前置高浓度聚合物段塞后,可以有效扩大波及体积,但表面活性剂与碱和聚合物之间无因次等浓距增加,色谱分离现象加剧。大庆油区喇嘛甸油田不同区块油水性质差异对色谱分离现象存在影响,原因在于部分重烷基苯石油磺酸进入油相,影响水相中浓度检测值。强碱三元复合驱油体系中表面活性剂与碱和聚合物之间色谱分离程度比较严重,碱与聚合物之间较弱。