浅析昆钢转炉终渣∑（FeO）、碱度及其关系与控制

分析昆钢转炉终渣∑（FeO）、碱度及其关系，并提出在昆钢目前的冶炼条件下∑（FeO）和碱度的合理控制范围及相关措施，以便进一步优化冶炼控制。     

中国煤炭工业技术进步的真实记录

能源经济是国民经济的重要组成部分.能源经济对社会进步和经济发展起着推动和拉动作用,能源利用效率反映了国家社会生产力水平,能源消费水平反映人民生活质量,能源产业结构的优化是经济发展的加速器.     

SPH Simulation of Hypervelocity Impacts

The smooth particle hydrodynamics (SPH) method is a very important tool to resolve hypervelocity problems. The basic principle of SPH method and how to generate a proper SPH mesh is described. The results of SPH simulations of hypervelocity impacts on thin or thick aluminum plates, performed by using the LS-DYNA 3D computer code, are also reported. The forming process and composition of the debris clouds simulated are identical with the experiment results. It can be concluded that the simulation is reasonable and SPH method is an ideal method for hypervelocity impact simulation.     

浅谈火电厂运行管理工作的优化方案

现阶段,随着市场竞争环境的日益激烈,对火电厂运行管理工作的要求也越来越严格,为了适应新形势下的市场挑战,十分有必要优化火电厂传统的运行管理方式.本文通过对火电厂运行管理进行相关的分析,提出了优化其运行管理工作的方案,希望能为火电厂经济效益和市场竞争力的提升提供一定的借鉴.     

三炼钢转炉烟道堵塞分析及对策

分析了转炉烟道堵塞物来源、堵塞过程及原因，简述了消除烟道堵塞的措施。     

能源载体条件下静钻根植桩承载特性

为了研究温度荷载影响下静钻根植桩的承载特性,通过室内试验测得温度在混凝土-土界面上的传导特性及对界面接触摩阻力的影响. 测试结果表明,接触压力对温度传导无明显影响,温度对混凝土-土接触面上摩阻力无明显影响. 根据试验测试结果,采用顺序热力耦合分析方法,建立考虑温度荷载影响的静钻根植桩受力分析有限元模型. 计算结果表明,制热及降温过程对静钻根植桩承载特性的影响受桩顶荷载的影响较大. 温度荷载引起的预制桩桩身轴力、桩侧摩阻力及桩顶、桩端位移、水泥土竖向应力的变化均与桩顶荷载相关,制热与降温过程引起的静钻根植桩承载特性变化有较大差异.     

Variation of hydraulic gradient in nonlinear finite strain consolidation

In the research field of ground water, hydraulic gradient is studied for decades. In the consolidation field, hydraulic gradient is yet to be investigated as an important hydraulic variable. So, the variation of hydraulic gradient in nonlinear finite strain consolidation was focused on in this work. Based on lab tests, the nonlinear compressibility and nonlinear permeability of Ningbo soft clay were obtained. Then, a strongly nonlinear governing equation was derived and it was solved with the finite element method.Afterwards, the numerical analysis was performed and it was verified with the existing experiment for Hong Kong marine clay. It can be found that the variation of hydraulic gradient is closely related to the magnitude of external load and the depth in soils. It is interesting that the absolute value of hydraulic gradient（AVHG） increases rapidly first and then decreases gradually after reaching the maximum at different depths of soils. Furthermore, the changing curves of AVHG can be roughly divided into five phases. This five-phase model can be employed to study the migration of pore water during consolidation.     

大方坯连铸漏钢原因分析及控制研究

针对Q235KZ钢230 mm×230 mm大方坯连铸二冷区频繁漏钢事故,采用扫描电镜、低倍腐蚀、成分分析、黏度测定、模拟计算等方法开展研究。研究发现连铸坯表面存在较长的纵裂纹,且漏钢坯壳附近存在夹渣。此外,发现结晶器内的初始凝固坯壳生长不均匀,在结晶器出口处最薄坯壳厚度为7.9 mm,最厚为20.2 mm。通过调整保护渣碱度、降低渣膜导热速率、优化二冷区水量分配,大方坯漏钢次数显著降低。     

结构性软土弹塑性损伤模型及其应用

为了考虑结构性对软土工程特性的影响,引入结构损伤变量,在岩土损伤力学理论和经典的修正剑桥模型基础上建立扩展的弹塑性损伤模型,通过固结压缩试验和三轴剪切试验确定模型参数.在通用有限元软件ABAQUS平台上开发所建立的弹塑性损伤模型UMAT子程序.将所建立弹塑性损伤模型应用到室内固结压缩试验和现场堆载预压试验的数值模拟中,并与修正剑桥模型所得结果进行对比.结果表明,当荷载较低时,弹塑性损伤模型计算所得沉降小于修正剑桥模型的结果;当荷载大于结构屈服压力时,弹塑性损伤模型计算所得沉降大于修正剑桥模型的结果,即弹塑性损伤模型能够反映软土结构性的特点.