连续式加热炉圆锭推钢受力分析

1 设计方案的选择我所两吨锤开坯加热炉,加热的物料非常特殊,是圆台形钢锭,尺寸为φ180/φ165×800mm,产量为0.8t/h。通常情况下,加热这种低产量、形状特殊的坯料时,采用室式炉的较普遍。但室式炉为     

轨梁3#移钢机升降机构受力分析

通过对3~#升降移钢机升降机构的受力分析,确定为维持机构所作给定运动而需加的平衡力矩,完善了移钢机的设计指导思想,从而确定了移钢机的设计方案。     

钢卷包装周向捆带受力分析及应用

通过材料力学、弹性力学和塑性力学等有关的工程固体力学进行分析计算得出对包装用捆带的捆扎力受力分析。从工程应用的角度上,通过对钢卷的周向捆带的受力分析,形成适用于钢卷包装用的基础性理论和计算公式,为提高钢卷包装质量提供理论依据。     

卸荷式与悬臂式挡土墙受力分析及比较

通过对悬臂式钢筋混凝土挡土墙年卸荷式钢筋混凝土挡土墙受力分析比较，可以看出，同样高度的卸荷式挡墙较悬臂式挡墙在挡墙墙壁根部所受变和左要小。     

斜配轧辊辊环形状与受力状况的关系及应用

本文通过对斜配轧辊辊环形状与其受力状况关系的详细分析，说明可以通过改变轧辊辊环的形状来达到改善辊环受力状况，进而避免因打坏辊环而造成轧辊报废的目的；并对如何改进辊环形状尺寸的计算方法进行了详细地介绍。     

新型组环式热水炉的结构设计与热分析

新型组环式热水炉采用内、中、外三个偏置水套组成独特的结构,通过热特性参数优化和热分析,使其实现以较小换热面积可获得较大的换热量,热效率高,结构简单,体积小,有节能、节材的功效。     

中板轧机受力状态分析

四辊中板可逆轧机受力频繁。分析轧机两侧机架轧制力、机架拐角应力和液压系统缸内压力之间的关系,对保证设备安全,改进生产工艺有重要意义。实测数据的分析表明,三者之间有很好的线性相关性和性态的一致性,均可作为度量轧机受力状态的参数,特别是用拉式应变传感器测量机架两侧轧制力简单方便,测量数据准确可靠,重复性好。     

ZR式廿辊轧机各辊轴承受力分析

ＺＲ式廿辊轧机适合于大压力轧制，因此各轧辊及各种轴承的损坏除其他因素外，辊系受力不均，是造成它们破坏的原因之一。准确的分析受力大小，对事故原因分析以及正确选用和校核备件材质有一定的指导作用。     

转炉基础的受力分析

研究和分析了几种典型转炉及倾动机基础的受力情况,推导计算公式,绘制受力图表。分析方法及研究结果经实践检验,具有实用价值,可供工程设计、教学参考     

Fracture Mechanics Model for Analysis of Plain and Reinforced High-Performance Concrete Beams

In developing a one-dimensional analysis and design procedure for reinforced concrete structures, research is generally based on yield phenomena and the plastic flow of steel in tension and concrete in compression. The ability of concrete to resist tension is considered in the form of tension stiffening or is completely disregarded. This procedure does not account for the influence of structural size in changing the failure mode and the stress distribution across the uncracked or cracked ligament. The key factor affecting this stress distribution is found to be the strain-softening modulus. This paper presents an improved model that is based on the fundamental equilibrium equation for the progressive failure of plain concrete beams. The concrete stress-strain relationship in tension is derived by calculating the peak tensile stress and softening modulus for different depths of beams on the basis of the fracture parameters obtained with the size effect law. Thus, the proposed model uses the peak tensile stress and the softening modulus, which vary depending on the size of the beam. To study the effect of the strength of high-performance concrete (HPC) on the concrete tensile stress-strain relationship, the experimental load-deflection plots of different-sized beams are compared with those obtained by using the proposed analytical model for eight different mixes made with locally available fly ash and slag. The model is also extended for lightly reinforced concrete beams, and the results are compared with those in the literature and are found to be in good agreement.     

矿用汽车工作装置的力学分析

在工作装置的力学分析中,将物料的重量作为变量来考虑。通过建立不同倾卸角下,重心变化的数学模型,利用计算机辅助设计手段,较详细地分析了重心变化对工作装置受力分析的影响。     

Fracture Mechanics Based Model for Joints under Cyclic Loading

A generalized interface model for joints and cracks in quasi-brittle materials is formulated. The proposed model marries an existing fracture mechanics based one developed for monotonic loading of concrete with another frictional based model developed for the cyclic response of rock joints to address the (reverse) cyclic response of rough surfaces in the presence of cohesive stresses. The properties of the model and its capability to capture several experimentally observed behaviors are shown by the numerical simulations performed. This joint constitutive model is particularly suitable to simulate the seismic response of dam/rock joints subjected to seismic excitation, or of concrete joints under reverse cyclic loading.     

SIED实体钻力学模型与切削参数研究

通过对深孔加工技术的研究,建立了SIED钻的力学模型。利用计算机三维造型与有限元分析相结合的方法,对刀具的钻削过程进行了仿真和试验分析。研究结果表明,Deform-3D软件可以精确地显示SIED实体钻的切削力、扭矩和磨损情况,从而为刀具的优化和切削参数的选择提供理论依据。     

Study on Kinetic Model for Dephosphorization of High-Phosphorus Hot Metal Pretreatment

Focused on the hot metal pretreatment process in the torpedo-car and based on the powder injection metallurgy principle, a kinetic model for dephosphorization of high-phosphorus hot metal pretreatment was developed. The validity of this model was verified by comparison between the experimental results in laboratory and the calculated results. The influences of dephosphorization capacity of molten slag and technological conditions on the dephosphorization efficiency were calculated by applying the model. The results show that lower temperatures are favorable to dephosphorization, CaO content in slag should be controlled at about 50%, suitable initial phosphorus content in the hot metal with higher phosphorus contents is about 0.35% by comprehensively considering various factors, slag systems of higher iron oxide content and higher basicity have higher capacity of dephosphorization.     

金属疲劳断裂过程中的尖点突变模型

基于疲劳断裂过程中存在着突变现象的观点,对系统（由疲劳试样和疲劳试验机所组成）在疲劳断裂过程中的变化情况作了深入研究,建立了疲劳断裂过程中尖点突变的模型,并通过理论分析获得了疲劳断裂过程中突变发生的条件.     

6063铝型材表面斑点腐蚀的机理分析

以6063铝型材表面斑点为研究对象，从本质、产生原因、腐蚀机理三个方面对其作了细致入微的分析，并建议性的提出了几点防止措施。     

浅析选矿厂金属平衡

针对某矿山选矿厂金属平衡工作存在的问题（理论回收率与实际回收率差值较大）,选矿厂通过对跑、冒、滴、漏的治理,强化原矿计量、取制样及化验的管理等有效措施,逐步解决了这个问题,从而使矿山金属平衡数据真实表明选矿厂的生产技术管理水平.     

应用断裂力学分析铬钼钢的热疲劳特性

通过试验分析了2．25Cr-1Mo钢的同相和异相热疲劳特性，并应用弹塑性断裂力学方法对其寿命作了解析评价。试验和计算都表明，在相同应变范围下，同相热疲劳的寿命低于异相。另外，计算值和试验值吻合，说明J积分用作评价Cr-Mo钢热疲劳强度的力学参数及本文所建立的计算方法有效。作者还从能量角度提出了一个用于描述裂纹扩展能力的参数△W。在相同△W值下。同相热疲劳寿命和异相热疲劳寿命相等。