Non-Resonant Structure Design of Catenary Transformer in Ultrasonic Gear Honing

To solve the design problem of transformer composed of non-resonant structure in ultrasonic gear-honing,force coupling conditions for moderately thick annular plate (MTAP) and catenary horn are propose...     

宏远煤矿液压柔掩支架的技术应用

为了解决4.2 m柔掩工钢支架强度有限,在顶板压力大或地质变化时经常造成支架挤架、摞架、架斜等现象给安全生产带来的重大安全隐患。宏远煤矿大胆尝试采用ZRY36/45L型柔性液压支架采煤工艺,结果表明采用该液压支架后保证了工作面的安全生产,生产效率得到了较大的提高,促进了安全高效矿井的建设。     

多氢酸酸化反应特征及动力学

利用自制多氢酸液XS-1进行静态岩粉溶蚀与岩心流动实验,通过SEM、ICP等实验考察了多氢酸的缓速性与预防二次沉淀性能,并研究了多氢酸与岩心反应动力学特性。结果表明,XS-1多氢酸液具有良好的缓速与预防二次沉淀性能,反应后残酸的极限浓度为0.296 1 mol/L,酸液有效作用时间为6~7 h。在该多氢酸体系下岩心渗透率提高至4.15倍,在此条件下以酸岩反应动力学参数模型建立动力学方程,反应速率比同条件下普通酸液小,进一步证明多氢酸具有一定的缓速性。     

水温耦合作用下风化砂岩崩解和质量流失研究

随着公路建设向山岭重丘区的转移,如何就地取材,利用风化岩进行路基填筑,以弥补山区路基填料的不足,已成为亟待解决的问题。为确保风化砂岩填筑路基长期使用性能,提出水温耦合作用下风化砂岩崩解和质量流失的试验测定方法,并将材料的干湿循环崩解率和质量流失率与风化程度进行了相关性分析。     

Property uniformity of thick nickel-based alloy plate for nuclear power steam-generator divider plate

This paper introduces a thick 690 nickel-based alloy plate produced by the former Baosteel Special Steel Co.,Ltd.used as the steam-generator divider plate in the pressurized water reactor nuclear power plant.According to the product characteristics and design requirements of the thick nickel-based alloy plate, multidimensional sampling and testing were conducted to investigate its microstructure and mechanical properties.The results show that all the property indexes of the thick hot-rolled nickel-based alloy plate meet the design requirements, and there is good uniformity in the microstructure and mechanical properties in different dimensions.These findings indicate that China has mastered the core manufacturing technology of thick nickel-based alloy plates for their use as divider plates in nuclear power steam generators.     

苏里格致密砂岩气藏未动用储量评价及开发对策

为落实苏里格气田强非均质致密砂岩气藏储量规模和动用程度、评价稳产潜力，基于储层地质知识库，通过细分计算单元采用"容积法"完成储量复算；结合储层静态参数、气井生产指标及内部收益率建立了储量分类评价标准，将储量分为富集区、致密区和富水区三类；优选"单井控制面积法"评价已动用储量和剩余未动用储量。评价结果表明，苏里格气田储量基础落实，各区块储量动用程度差异大，储量综合动用程度为40.1%，剩余未动用储量规模大，稳产潜力较好。目前经济技术条件下，气田稳产主要通过井网加密、侧钻水平井及查层补孔的方式来提高富集区和致密区储量动用程度，富水区剩余储量的有效动用仍须进一步攻关。     

A Large Strains Finite Element Multiscale Approach

A novel formulation for multiscale finite element analysis of multiphase solids undergoing large strains is proposed in this paper. Within the described homogenization technique no constitutive assumptions are made at the macrolevel. A crucial aspects of the approach is the modeling of antiperiodic traction on the boundary of the representative volume element, condensation technique and the formulation performed on a deformation-driven context whereby the macroscopic deformation gradient is prescribed. Numerical tests on solids with voids demonstrated the robustness of the technique.     

Effects of layup sequences on stresses of thick composite cantilever tubes

In this study, a new simple-input displacement-based method is used to study effects of layup sequences on stresses, strains, and deformations of thick laminated orthotropic cantilever straight tubes under transverse loading. Three-dimensional stress distributions are obtained based on the most general displacement field of elasticity. A layer-wise theory which includes the full three-dimensional constitutive relations is used. A non-dimensional simple coefficient is introduced to compare interlaminar radial stresses of different layup sequences. Finally, some design guidelines are proposed to consider effects of layup sequences of laminated thick composite tubes subjected to shearing load.     

新场气田沙二气藏致密砂岩气层再评价研究

新场气田沙二气藏为多层叠置气藏,自上而下主要由4套含气砂体组成,共分为JS21、JS22、JS23、JS24四个气层,埋深为2200~2500m,平均孔隙度为10.2%,属低-中孔储层,试井解释有效渗透率低于0.1×10-3μm2,属典型的致密砂岩储层。新场沙二气藏累计提交探明地质储量534.35×108m3,动用地质储量445.08×108m3,累计采气量120.35×108m3,优质储量已全部动用,解释级别较低的致密砂岩气层动用程度较低。随着压裂改造工艺技术的进步,在以前难动用的储层上建产,将成为该气藏稳产的重要手段。根据各地质参数对油气的不同响应特征,建立了超平衡钻井条件下气测值的校正与恢复方法、地质指标权重评价等录井解释评价新技术,并利用该技术,对原来解释级别较低的致密砂岩气层潜力进行了再评价,筛选出了该类气层的潜力级别,为老井挖潜和气藏后期开发部署提供技术支撑。