粉末冶金齿轮成形阴模计算方法与程序化设计

针对目前粉末冶金齿轮成形阴模设计精度和效率低的特点,介绍了用变模数法设计计算粉末冶金齿轮成形阴模的新方法,并以Pro/E为开发平台,以Pro/Program为开发工具,进行粉末冶金齿轮成形阴模的程序化设计,从而提高了粉末冶金齿轮成形阴模的设计精度和效率.     

热风炉组合砖的三维开发设计及精确建模

介绍了热风炉组合砖的三维设计过程，以及利用Pro／E软件对组合砖结构的进行建模及虚拟装配办法和步骤。     

基于Pro／E的溜槽传动箱三维运动仿真

基于Pro／E软件,建立了800m^3级高炉溜槽传动箱的三维实体模型,并定义了各零部件之间的装配关系和运动关系;根据实际情况设定了两个转动驱动、四个齿轮副;完成了溜槽传动箱的运动仿真,并输出了运动视频文件。真实、清晰、直观的表达了溜槽传动箱的工作方式和内部传动关系。     

粗轧机架拉杆断裂的原因分析

采用三维建模软件Pro／E和有限元分析软件ansys，对棒材厂粗轧机架拉杆频繁断裂的原因进行分析，并做了有效的改进。     

回转驱动装置设计

设计了“高空飞翔”游乐设施的回转驱动装置,根据设备外形尺寸以及回转运动的基本参数,利用计算机辅助软件Pro/E创建了三维模型,计算了回转运动所需的扭矩,同时校核了电机功率和齿轮径向力,最后提出了安装方案。研究表明,回转驱动装置由电机减速机、齿轮传动和回转支承组成,设计成果对机械设计具有参考意义。     

Pro／E三维建模技术在桥梁钢箱梁制造中的研究与应用

随着交通事业的不断发展,桥梁建设跨江跨海,桥梁钢箱梁制造技术逐渐成熟并日臻完善。本着精益求精、“桌面造桥,数字造桥”的科学理念,在桥梁钢箱梁制造上研究新方法,以推动桥梁建设的科学发展。 本文着重介绍了重庆鱼嘴长江大桥钢箱梁制造中的Pro／E三维建模技术研究与应用。针对钢箱梁的结构特点,结合详尽的施工工艺,以计算机Pro／E三维建模为载体,将钢箱梁以实体的形式呈现出来,给建设者带来感观上的认识,同时提供钢箱梁制造的详尽信息以便于施工组织设计。     

基于Pro／Engineer的压缩弹簧参数化零件库的实现

本文介绍了基于Pro／Program二次开发的基本原理和方法以及库菜单索引文件的编写,并以压缩弹簧为例,介绍建立基于Pro／Engineer的参数化零件库的实现过程。设计人员可以借助本文介绍的方法和步骤建立各类零件的模型库,生成系列零件,对缩短设计周期很有作用,具有较大的推广价值。     

基于Top-Down设计方法的卷取机设计

介绍了Pro/E三维设计软件的Top-Down设计理念在冶金非标准设备设计中的应用;通过案例分析得出Top-Down设计方法符合冶金非标准件多变更,单批量设计生产的需要.     

“在兄弟刊物上”

“在兄弟刊物上”本刊编辑部机械传动噪声的控制／杨怀云／／矿山机械．－１９９４，（９）．－３２～３４分析齿轮传动系统中引起噪声的诸多原因，介绍降噪的有效途径，主要有适当选择传动装置类型、减震、简化缩短传动链、适当控制齿轮副的线速度、改善齿轮设计结构提高...     

Pro Imaging金相分析系统自动测量粉尘分散度

介绍了一种用Pro Imaging金相分析系统自动测量粉尘分散度的方法,详细介绍了如何标定该Pro Imaging金相分析系统,阐明了Pro Imaging金相分析系统自动测量粉尘分散度的具体步骤,并给出测试结果,试验证明了该方法的优越性。     

基于遗传特性的坯壳应力场分析

在考虑连铸坯壳应力遗传特性的基础上,建立了结晶器内坯壳的二维应力分析模型,利用ANSYS的初应力方法实现了坯壳应力遗传行为.分析结果表明:与传统应力模型的分析结果相比,遗传分析模型计算的坯壳位移和应力分布规律基本相同.应力遗传方法得到的应力值明显较高,在铸坯中部和角部,坯壳等效应力最大值分别高出12%和70%.     

基于H型钢残余应力主动控制的矫直工艺设计

针对H型钢辊式矫直过程残余应力的主动控制,基于工程弹塑性理论建立一种矫直过程应力演变的分析模型;采用离散解析实现对模型的快速数值求解;继而基于该分析模型建立一套能够实现残余应力主动控制的工艺参数主动设计方法;运用该方法对典型规格H型钢矫直工艺参数进行工艺设计.建立的分析模型运算结果与有限元结果吻合且计算成本得到有效控制,模型能够实现有限时间内整个矫直工艺参数域内残余应力演变结果的分析;工艺设计方法能够得到一定目标参数和约束条件下的残余应力主动控制工艺参数.      

结晶器内坯壳应力分析方法的优化

在考虑连铸坯壳应力遗传特性的基础上,建立了结晶器内坯壳的二维应力分析模型,利用ANSYS的初应力方法实现了坯壳应力遗传行为分析。分析结果表明,与传统应力模型相比,遗传分析模型坯壳的位移和应力分布规律基本相同,但应力值存在明显差距。拉速对坯壳应力存在显著影响,而浇注温度影响很小;在正常范围内锥度对坯壳热应力的影响较小。     

Improving the Accuracy of Structural Hot‐spot Stress Approach

A method for extending the applicability of the structural hot‐spot stress method for fatigue assessment of welded structures is discussed. The structural hot‐spot stress method for plate structures, as currently presented in commonly used design guidance documents, cannot account for the effect of weld size, and load carrying fillet welds are assessed using a different S‐N curve as compared to non‐load carrying fillet welds. This paper presents a proposal to linearize the local stress distribution through the plate thickness in the plane of the weld toe. This proposal considers the forces transmitted by the weld itself. A bilinear stress distribution, which partially captures the local effect of the weld, is derived from the non‐linear stress distribution. The non‐linear distribution is based on equilibrium and the stress in the fillet weld. A simple procedure is presented to determine the bilinear curve from the nominal weld stress. This is a great advantage in finite element analysis when only nominal base plate stress and nominal weld stresses need to be determined. When compared to the more conventional structural stress approach, the new method also has the advantage that extrapolation is not required. The same weld stresses can also be used in the analysis of the root cracks. The proposed method was scaled to correspond to the traditional structural hot‐spot stress method using detailed linear elastic fracture mechanics simulations. The method is only applied to fully load‐carrying welds here but can also be used for partial load‐carrying welds. A symmetric splice plate having a fully loaded fillet weld is presented as an example case. The influence of base plate thickness is studied as well.     

宝钢3号高炉炉壳开孔强度有限元计算

针对宝钢３号高炉因安装冷却筒需要在炉壳上开孔问题,依据宝钢３号高炉实际情况,进行炉壳整体应力计算,并以此为依据,模拟高炉炉壳开孔的各种模型,分别进行高炉炉壳开孔强度弹笥应力计算、塑性应力计算以及工应力计算。为验证计算的可靠性,制作了光弹实验模型,进行光弹性应力分析,得到与有限元弹性应力计算相吻合的结果。     

由光应力计显示的应力条纹计算围岩应力及灵敏度分析

光应力计是研究矿山压力问题的一种重要手段,它作为围岩应力的转化元件能显示出应力条纹,但是,由应力条纹如何定量确定围岩应力的问题尚未得到妥善解决。应用弹性力学理论,得出光应力计的应力条纹与围岩应力的关系式,并对有关围岩力学参数与光应力计灵敏度的关系作了初步分析     

钛合金过滤器抗冲击性能分析

以舰船压载水过滤器为研究对象,采用动态设计分析法计算其抗冲击性能,并利用时域分析法将冲击响应谱转换为正负三角波进行抗冲击计算,对比验证抗冲击性能计算结果的正确性.同时,对不同材质的过滤器进行抗冲击计算,分析材质对过滤器抗冲击性能的影响.结果表明:采用动态设计分析法与时域分析法获得的冲击应力大小及分布规律一致,证实了抗冲...     

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.     

Axial transformation method in the analysis of the axisymmetric plastic flow

A new method for the analysis of mechanics of plastic flow is presented in this paper. The basis of the method is nonlinear transformation of the deformation zone. After transformation, the deformation zone is divided into several rectangular elements. It is a characteristic feature of the presented method which enables to determine a continuous strain and stress field. The exact fulfillment of equations concerning equilibrium and incompressibility conditions was accomplished. The method was verified by experiments. An example of the strain and stress fields in a material deformed between concave anvils was presented.     

遂昌金矿地应力测定与分析

结合遂昌金矿采空区监测研究,应用空芯包体应变计和套孔应力解除法测定遂昌金矿地应力,掌握了地应力大小、方向等应力分布规律,为采空区稳定性分析和采场布置提供了有效的应力数据.