Thermal Fracture Analysis Of Nonhomogeneous Plate with Interfaces Under Uniform Heat Flow

The mixed-mode thermomechanical fracture problem in a nonhomogeneous material plate with two interfaces is studied in this research. Uniform heat flow conditions are considered. The interaction energy integral method for the thermal fracture problem is developed to calculate the thermal stress intensity factors (TSIFs) in nonhomogeneous materials. This method is proved to be domain independent for nonhomogeneous materials even when the integral domain is cut by one interface or many interfaces. Combining the interaction energy integral method with the extended Finite Element Method (XFEM), the temperature fields, the displacement fields, the thermal stress fields, and the TSIFs are calculated. In this article, both the edge crack and the internal crack are considered. Some examples are presented to study the influence of the material properties on the TSIFs. It can be found that the mismatch of the elastic modulus and thermal expansion coefficient can affect the TSIFs dramatically; however, the thermal conductivity interface will not arouse a kinking behavior of the TSIFs. It can be concluded that the existence of an interface (especially for elastic modulus and thermal expansion coefficient) affects the TSIFs greatly.     

西峰油田合水区块长8岩性油藏流动单元划分

针对西峰油田合水区块长8岩性油藏具有典型的低孔特低渗透与强非均质性的现状,纵向上,以岩心观察与分析和测井资料为基础,应用高分辨率层序地层学原理,对研究区长8储层进行精细的等时地层单元划分;平面上,经综合分析选取了有效厚度、孔除度、渗透率、含油饱和度、流动带指数等5个权重参数.对这些参数应用SPSS统计分析软件进行聚类分...     

Study on the Stability of Ion-exchange Resin Catalysts:Ⅰ. TGA as a Rapid Evaluating Method

The thermal stability of five commercial ion-exchange resin catalysts was studied by means of thermal gravimetric analysis(TGA) at elevated temperatures of up to 600℃and isothermal temperatures in the range of 150℃and 200℃.Resin samples with different initial water contents were also investigated.The study indicated that TGA,as a complementary evaluating method for the plug flow reactor system approach,could be used as a fast analyzing means for study on the thermal stability of ion-exchange resin cataly...     

设备状态维修在现代企业设备管理中的应用

对纺织企业沿用了４０多年的周期计划维修制度的局限性进行了分析,对设备维修方式进行了大胆改革和探索。采用状态维修取代周期计划维修后取得了显著成效。指出：实施设备状态维修是市场经济的客观要求,纺织企业在现有条件下对设备进行状态维修不仅是可能５的,而且是可行的。     

浅谈余热锅炉隔热耐火衬里冬期施工解决方案

主要介绍了隔热耐火衬里5℃以上环境施工,15℃-25℃养生和80℃-120℃低温干 燥窑烘干的方法,同时解决冬期余热锅炉的生产问题。     

KM-250/1600型快速隔膜压滤机的应用

新庄孜选煤厂采用kM-250/1600型快速隔膜压滤机对主洗工艺进行技术改造,改造后煤泥处理能力大,速度快,效率高.本文介绍了该设备的主要技术特征、运行、调试和实际应用的效果.     

非洲丛林沼泽地带长输管道施工技术

在非洲丛林沼泽地带施工受到当地诸多特殊环境因素影响。文章介绍了加纳天然气管道工程概况,分析了非洲丛林沼泽地带管道施工难点,据此提出了施工方案及关键过程控制措施、焊接质量保证措施、防腐层保护措施等,顺利地完成了工程任务。     

不对称催化氢化反应中固载催化剂的研究进展

综述了近年来不对称催化氢化反应中固载催化剂的研究进展。新型固载催化剂的研制和开发为不对称催化氢化的应用范围奠定了基础,推动了不对称催化氢化反应的发展。     

低压火成岩油藏完井工艺技术

分析了胜利油田低压火成岩藏的地质特征,介绍了几种完井新工艺在该油区12口井中的应用情况,该完井新工艺保证了固井质量,保护了油气层,使单井原油产量有了较大的提高,生产成本大为降低,油井寿命也得以延长,实现了低压火成岩的高效开发,取得了十分显著的经济效益。     

淮北大堤阜蒙新河闸基工程特性分析及方案优选

对阜蒙新河闸基淤泥质土的分布特征、工程特性进行了阐述,分析其对水利工程建设的影响,在基础加固措施方面提出了相应的建议,并提出了优选方案,为相似工程地质条件的水利工程提供了一定的参考。