共查询到20条相似文献,搜索用时 62 毫秒
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粉末注射成形充模流动的数值模拟 总被引:2,自引:0,他引:2
论文将粉末注射成形喂料在薄壁模腔中的流动视为二维流动,以流变学的基本方程为基础,建立了从动量方程、连续方程和热传递方程得到的描述粉末注射成形充模流动的数学模型。在无滑移边界的条件下,推导了喂料熔体流导率的计算公式和压力场的控制方程,得到的压力场控制方程是一非线性椭圆偏微分方程,从而可用Galerkin方法进行数值求解,使模型的数值求解成为可能,为进一步对粉末注射成形进行计算机模拟和数值分析奠定了数学基础。 相似文献
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ANSYS二次开发在PIM充模流动模拟中的应用 总被引:4,自引:0,他引:4
论文介绍了ANSYS所具有的针对不同需求、特点和应用范围的多种二次开发技术;根据PIM充模喂料流体的幂律模型,基于ANSYS用户可编程特性中对其FLOTRAN模块流体特性中的粘度模型进行了二次开发,用所开发的幂律模型对I型拉伸试样的PIM充模二维流动进行了数值模拟,模拟结果与实验结果吻合很好;并将二次开发的方法推广到PIM喂料的密度、导热系数、比热等的修改,为将ANSYS强大的计算流体力学功能广泛应用于PIM充模流动模拟的研究奠定了基础。 相似文献
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注射模开发的并行工程探讨 总被引:1,自引:0,他引:1
本文分析了注射模的开发过程,它是一个多环节,多循环,多次修改,多次调试过程。为了提高开发的质量和效率,最好的解决方法是采用并行工程,为此,讨论了可行性及其基本条件。 相似文献
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李健心 《计算机辅助设计与制造》1997,(8):20-22
注射模冷却系统设计得是否合理,直接影响塑件的尺寸精度和机械性能,传统的设计方法仅适用于形状简单的中小型模具,对于大型、精密和形状复杂的注射模只有利用CAE进行冷却分析爰有得到合理的结果。 相似文献
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铸造充型过程流场模拟会产生数以万计的数据,如温度、压力等标量,速度等矢量,这些数据场的显示是铸造充型过程流场模拟的关键问题之一,也是计算机图形学的研究热点。文中采用体视技术显示铸件的充型过程,其图形清晰生动,既能体现铸件的整体感,又能显示流场的内部细节。 相似文献
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本文论述了注塑成型过程模拟教学系统的实现原理、组成、图形界面及其特点。本系统经过多年的实际应用取得了良好的教学效果。 相似文献
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漏磁信号的有限元分析与仿真 总被引:3,自引:0,他引:3
在无损检测中,仅仅发现缺陷的存在是不够的,如果能从检测到的缺陷信号中,提取被检件上缺陷的参数,从而了解被检件受损程度,这对被检件合理使用具有重要意义。该文叙述了漏磁检测的原理,介绍了有限元分析方法在管道缺陷漏磁检测中的应用,利用ANSYS软件对不同大小形状的管道缺陷产生的漏磁信号进行仿真分析,并给出了二维仿真结果,由此推导出漏磁信号的参数与缺陷形状大小的对应关系,进而由所检测到的信号反推出被检件损伤情况,为缺陷鉴别及管道寿命评价提供依据。 相似文献
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This paper is concerned with the numerical simulation of the injection mold filling process.A mathematical model based on generalized Hele-Shaw flow for an inelastic non-Newtonian fluid undernonisothermal conditions is used.A hybrid numerical scheme is employed.The numerical simulating re-sults,pressure and temperature profile,location of the melt fronts,are in a good agreement with the ex-perimental ones. 相似文献
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M. A. Walkley P. H. Gaskell P. K. Jimack M. A. Kelmanson J. L. Summers 《Journal of scientific computing》2005,24(2):147-162
An adaptive finite element algorithm is described for the stable solution of three-dimensional free-surface-flow problems based primarily on the use of node movement. The algorithm also includes a discrete remeshing procedure which enhances its accuracy and robustness. The spatial discretisation allows an isoparametric piecewise-quadratic approximation of the domain geometry for accurate resolution of the curved free surface. The technique is illustrated through an implementation for surface-tension-dominated viscous flows modelled in terms of the Stokes equations with suitable boundary conditions on the deforming free surface. Two three-dimensional test problems are used to demonstrate the performance of the method: a liquid bridge problem and the formation of a fluid droplet. 相似文献
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非线性动态有限元碰撞仿真技术的工程应用研究 总被引:8,自引:1,他引:8
该文简要介绍了非线性动态显式有限元碰撞仿真技术的相关理论和算法 ,涉及到实际应用中的一系列关键问题及解决方案。最后文中以薄板冲压、汽车碰撞等工程实际问题为例运用所述理论进行了仿真计算研究 ,取得了令人满意的效果 ,因而也为其它有关碰撞问题的研究解决提供了一种强有力的方法和思路 相似文献
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A CAD-CAE Integrated Injection Molding Design System 总被引:9,自引:0,他引:9
. In the injection molding design process, interaction between design and analysis is very intensive. This is to ensure that
the plastic part being designed is manufacturable by the injection molding process. However, such interaction is not supported
by current computer-aided systems (CAD and CAE), because design and analysis are realized as isolated modules. Although most
of CAE systems provide built-in modeling tools, these are only meant for developing an analysis model with very limited CAD
functionality. On the other hand, some CAD systems have allowed certain CAE systems to run under their environments, but inherently
they use different data models, thus communication between them is poor. This paper presents an innovative, CAD-CAE integrated,
injection molding design system. This system uses an integrated data model for both design and analysis. The system is built
on top of existing CAD and CAE systems, which not only greatly saves development effort, but also makes full use of the strong
functionality of commercial computer aided systems. The system architecture consists of four layers: a CAD and CAE platform
layer; a CAD-CAE feature layer; a model layer; and a GUI layer. Two design cases were studied to illustrate the iterative
design-analysis process and use of the developed system. 相似文献