用Monte Carlo法模拟矿热炉炉料的导电行为

介绍了Monte Carh，法模拟矿热炉炉料导电行为的初步研究。模拟结果表明，模拟炉料中，矿石粒径一定，随焦炭粒径增大，形成逾渗结构的临界值Φc（导电相体积分数）增大；在临界点以上，炉料导电性与导电相——焦炭含量的关系近似于对数关系。纯焦炭颗粒直径对其电阻影响的模拟结果与冷态实验结果不符，说明该数学模型在模拟炉料电阻变化方面尚需要改进。     

岩石块体实际尺寸和形状分布的预测方法

预测矿体的可崩性在自然崩落法采矿中非常重要。本研究提出了自然崩落法中预测矿石破碎块度特性的三维（3D）模型，该模型基于Monte Carlo模拟技术。文中对以下问题进行了讨论：不连续面的抽样方法，三维模型系统和不连续面分布规律的分析法。另外，分析了每个模拟参数对矿石破碎块度的分布影响。以中条山铜矿峪为例，研究了崩落矿石的块度特性。以以上讨论的方法为基础，介绍了“MAKEBLOKE”软件系统，用于分析矿体中不连续面的分布规律和预测崩落矿石的块度分布。用三维模型获得的矿石破碎块度与实际矿石块度之间具有很好的一致性。     

金属塑性变形过程的刚（粘）塑性有限元数值模拟

介绍了有限元法在塑性加工领域的研究进展；论述了刚（粘）塑性有限元法的主要思想和处理方法。基于前期的本构模型，得出了刚粘塑性有限元法的求解列式。对数值模拟的程序实现及关键技术，也作了介绍，并对有限元数值模拟的发展前景作了预测。     

掺铒钼酸钇钠激光晶体及其制备方法和用途

掺钕钼酸钆钡激光晶体及其制备方法和用途，涉及人工晶体领域，特别是涉及一种激光晶体掺钕钼酸钆钡BaGd2（MoO4）4及其制备方法和用途。采用提拉法（Czochr Mski方法），在1073℃，以15～40r／min的晶体转速，0．5～2mm／h的拉速，生长出了高质量、较大尺寸的Nd^3＋：BaGd2（MoO4）4晶体。该晶体是一种新型的激光晶体，可产生1060nm波长的激光输出。     

崩落散体流动空位填充法及其应用

基于随机理论,结合力学判据,提出散体流动空位填充法,并给出模型建立规则和方法,简化散体之间的力学关系,为崩落矿岩流动规律的研究提供新的方法;同时基于空位填充法,研发了二维放矿仿真系统（VFMS）,并利用该系统对不同结构参数进行放矿仿真试验,得出的结果符合放矿规律,说明利用空位填充法模拟散体流动是可行的。     

生产工艺结构变化对吨钢综合能耗的影响

论文提出研究钢铁生产结构优化问题的工艺结构分析法，用该方法研究了工艺结构参数（废钢比、连铸比、电炉钢比等）对企业吨钢综合能耗的影响。     

GH500合金热塑性变形研究

针对ＧＨ５００合金合金化程度高，工艺塑性低，热加工困难的特点，研究了热力学因素（变形温度，变形程度，变形速度）对合金工艺塑性，变形机理及组织影响，通过热模拟试验和高温拉伸变形试验等方法建立了合金的塑性图及金属流动压力曲线。采用金相法建立了合金的再结晶图。根据热力学因素对合金塑性，变形机理及组织等方面影响规律，确定了该合金的最高加热温度为１１５０－１１８０℃，终加工温度≥１０５０℃，最小及最大变形程     

螺旋藻对模拟矿山废水中稀土镱 离子的吸附性能

通过Zarrouk培养液获得了螺旋藻，并以其为生物质吸附剂，对模拟矿山废水中稀土镱离子的吸附性能进行研究.通过单道扫描电感耦合等离子体发射光谱（ICP-AES）、扫描电镜（SEM）、傅里叶红外光谱仪（FTIR）、多功能成像电子能谱仪（XPS）等分析方法对螺旋藻的结构和吸附性能进行研究.通过Freundlich，Langmuir，Redlich-Peterso和Dubinin-Radushkevich等温吸附模型，以及伪一级、伪二级、Elovich方程和颗粒内扩散动力学模型，对该过程的吸附动力学和热力学规律进行探讨，以了解该吸附过程的机理.结果表明:当被处理液的pH值为5、螺旋藻的剂量为2.0 g/L、初始镱离子浓度为100 mg/L和吸附时间为60 min时，螺旋藻对模拟矿山废水中的稀土镱离子的吸附去除率为77 %，且解吸附率可达到92.3 %，表明螺旋藻的吸附速率快、吸附效果较为理想.研究表明:该过程的吸附动力学行为符合伪二级动力学模型（R2>0.99），主要受化学吸附控制；且吸附等温线能较好用Langmuir方程进行模拟（R2>0.99），属于自发吸热型吸附过程.      

稀土串级萃取分离过程的自动控制系统

本文简要综述了近年来国内稀土串级萃取分离过程的自动控制情况，对该领域的计算模拟、专家系统等自控软件作了介绍，着重分析比较了２４１Ａｍ同位素源激发的能量色散Ｘ射线荧光（２４１Ａｍ－ＥＤＸＲＦ）在线分析方法，并就分析方法、工艺参数调整等环节中存在的主要问题提出了想法。     

共沉降-热压法原位反应合成TiC/Ni连续梯度材料

研究了制备连续梯度功能材料的共沉降－热压法（CS／RHP），采用该方法以Ti,C,Ni三种粉末为原料原位反应TiC，制备了TiC/Ni梯度材料，用X射线衍射仪和SEM分析了试样的组织。     

Large-Deflection Deformation of Ferromagnetic Plates in Magnetic Fields

Magnetoelastic buckling and postbuckling of ferromagnetic rectangular plates with geometric nonlinearity in magnetic fields are quantitatively investigated in this paper. A numerical program combining the nonlinear finite element method with an iterative method is proposed to solve the twofold nonlinear problem. The numerical results show that the ferromagnetic plate buckles when it is in a transverse magnetic field, and it bends prior to its instability when it is in an oblique magnetic field with tiny incident angle. The deflection pattern of the plates is changed from one-wave to semiwave after they lose stability.     

稀土电解槽温度场的数值分析

研究了氟化体系稀土电解槽温度场问题的数值模拟分析方法，采用有限元法计算了新的电解槽温度场，其分析结果，为新槽体的开发设计提供了参考依据。     

An improved method for evaluating the seasonal variability of total suspended sediment flux field in the Yellow and East China Seas

The suspended sediment flux field in the Yellow and East China Seas (YECS) displays its seasonal variability. A new method is introduced in this paper to obtain the flux field via retrieval of ocean color remote sensing data, statistical analysis of historical suspended sediment concentration data, and numerical simulation of three-dimensional (3D) flow velocity. The components of the sediment flux field include (i) surface suspended sediment concentration inverted from ocean color remote sensing data; (ii) vertical distribution of suspended sediment concentration obtained by statistical analysis ofhistorical observation data; and (iii) 3D flow field modeled by a numerical simulation. With the improved method, the 3D suspended sediment flux field in the YECS has been illustrated. By comparison with the suspended sediment flux field solely based on the numerical simulation of a suspended sediment transport model, the suspended sediment flux field obtained by the improved method is found to be more reliable. The 3D suspended sediment flux field from ocean colour remote sensing and in situ observation are more closer to the reality. Furthermore, by quantitatively analyzing the newly obtained suspended sediment flux field, the quantity of sediment erosion and deposition within the different regions can be evaluated. The sediment exchange between the Yellow Sea and the East China Sea can be evident. The mechanism of suspended sediment transport in the YECS can be better understood. In particular, it is suggested that the long-term transport of suspended sediment is controlled mainly by the circulation pattern, especially the current in winter.     

有限元法求解瞬态温度场时的振荡问题

 针对有限元方法求解瞬态温度场时产生的时间和空间上解的振荡问题,分析了温度振荡现象产生的原因。以中厚板生产过程为背景,通过采用集中热容矩阵的向后差分格式的方法解决了振荡问题。利用该方法得到的中厚板生产过程中瞬态温度场的计算结果和实测数据进行了验证比较,结果吻合良好。     

Analysis of the steady state molten pool obtained by heating a substrate with an electron beam

Surface melting and solidification with high powered beams can be used for enhancing surface properties. The dimensions of the molten zone define the extent of the modified properties and are critical parameters which must be predicted during process design. The flow field in the molten pool has been reported to be one of the key factors which controls the dimensions of the surface layer. However, the calculation of this is only possible through complex numerical schemes and there is a need to look for simple analytical expressions which may be adequate. One approach for this search involves the precise determination of the steady state stationary profiles and then developing a method for extending these values to include the effect of beam motion for predicting the pool dimensions during processing. In this paper, a study of the flow field and its effect on the depth and width of the steady state pool is presented, based on numerical and analytical methods. To validate the predictions, an experimental study is carried out using surface melting of Al-4.5 wt%Cu alloy an electron beam. The pool shapes are presented through optical micrographs and the depth and width of the pool is measured from these micrographs. The experiments are then simulated using a numerical model which includes fluid flow. The flow field is analyzed using streamline plots and the predicted pool shapes are compared with the micrographs. Further, the results are compared to an analytical method based on pure conduction and the pool depth and width are predicted when the liquid thermal conductivity is modified. The numerical and analytical predictions of the pool depth and width are found to be in good agreement with the experimental measurements (obtained from steady state stationary pools and from dimensions inferred on extrapolating moving beam measurements to zero velocity). The reasons for the success of the analytical model is discussed with reference to the two-dimensional flow fields and vortices predicted by the numerical model.     

箱型孔轧制方坯的显式动力学有限元模拟

借助有限元分析软件ANSYS/LS-DYNA，对方轧件在箱型中的动态轧制过程进行模拟仿真，分析了轧制区应力场和轧件变形参数。数值模拟结果和试验结果基本相符。     

Investigation of fusion welded butt joints in structural steels

In the present paper research work is presented combining material related research, weld fabrication related research and research in the field of numerical analysis of welded joint performance. Elements belonging to this extensive combination are mechanical testing, fracture mechanics testing of small scale and full thickness specimens, component testing including engineering defect assessment and numerical modelling using finite element method. Examples are given for each of the above mentioned elements.     

高雷诺数射流冲击对流系数的计算及数值分析

为了确定高雷诺数条件下射流与挡板之间的换热系数,采用理论分析和数值计算的方法,建立流场模型,分析流场各物理量的基本规律、流动特性和对流传热系数分布规律,并与已有实验数据进行比较。结果表明:驻点附近,流体与壁面之间的对流换热系数较低;板面上,随着到驻点的距离增大,对流换热系数增大并出现峰值然后降低,峰值出现在约0.2倍扩散半径处。数值计算与理论分析得到的换热系数较为接近。     

板坯连铸过程包含相变的三维瞬态热传导数值模拟

利用有限元软件ABAQUS／Standard对连铸结晶器和板坯进行了三维瞬态热传导数值分析，数值模拟计算了温度场．假设相变是在恒温下进行的，三维瞬态热传导方程中引入了潜热，即模拟过程考虑了金属结晶过程中释放的热量．同时也考虑了运动的板坯与结晶器之间的相互作用，从而获得了更准确的连铸过程中结晶器和板坯的温度场分布．     

Numerical Method for Lower-Bound Solution of the Rigid-Plastic Limit Analysis Problem

This paper describes a numerical method to determine the lower-bound solution of limit load of a rigid–perfectly plastic body obeying the von Mises yield criterion. The idea of this method is to construct a smoothed linear stress field that satisfies the yield criterion everywhere in the body. Applying the similar stress recovery techniques as superconvergent patch recovery and recovery by equilibrium in patch in the elastic finite-element analysis, the nodal stresses are obtained from those stresses at the integration points from an iterative process of upper-bound limit analysis. Then, the improved stress fields and lower-bound solutions can be derived by ensuring all the nodal stresses within the yield surface. The convergence of this method is guaranteed. The validity of the proposed method is demonstrated with some numerical examples. The computational results show that more reliable lower-bound solutions can be obtained by using this method, especially for problems with strain singularity.