共查询到14条相似文献,搜索用时 342 毫秒
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面向对象有限元并行计算框架PANDA 总被引:5,自引:5,他引:0
为提高我国工程数值模拟软件的开发能力,面向武器工程大规模并行计算需求,基于层次化、模块化及面向对象的现代软件设计技术,分析探讨有限元并行计算框架的设计方法,形成初步的基础开发框架PANDA 0.1版;详细描述PANDA框架的层次结构设计,并探讨该基础开发框架设计中的底层网格数据结构设计、有限元共性管理模块及并行策略等部分关键技术;简要介绍PANDA框架的扩展应用方法.研究表明:采用框架技术进行结构力学有限元程序开发,具有高效、快速和便捷等优点. 相似文献
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为实现面向对象有限元并行计算框架PANDA对高性能计算的支持,分别从并行计算流程、区域分解、分区信息和通信封装等部分设计PANDA框架在并行计算方面的数据结构.在计算流程中建立区域分解和并行求解器的配合协作方式,进而描述进行区域分割的3种网格剖分方法;对分区边界单元和节点信息的组织以及对并行通信操作的封装使复杂的并行通... 相似文献
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使用高性能并行计算机和ANSYS有限元软件,通过精确产生齿根过渡曲线和齿轮三维实体模型,建立可靠的高精度的有限元网格模型和计算模型.使用三维20节点等参单元计算,仿真一个真实齿轮整体模型的三维齿根应力和轮齿变形.二维模型和三维等效模型的仿真计算误差和可靠性对比表明,该方法可为计算齿根应力和轮齿变形提供参考. 相似文献
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The family of the so-called ‘isoparametric strain (displacement) elements’ is restricted to membranes and solids. The reason for this restriction has led to the development of a new family based on stress assumptions; these elements will be referred to as ‘isoparametric stress elements’. This family contains plates and solids but no membranes. The omission of a particular element in each family is consistent with the plate-membrane analogies. The basic flexibility matrix of an isoparametric stress element is singular since the zero stress state is directly included. The rank technique is adopted to automatically extract the zero stress modes such that the element can be completely interchangeable between any finite element system. The theory for stress assumed isoparametric “quadrilateral” plate bending elements with curved boundaries is given. A brief presentation of the theory for isoparametric stress solid elements is also included. 相似文献
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This paper presents a symmetric isoparametric finite element formulation for the inverse problem of aquifer transmissivity calculation with known piezometric head. An important aspect of the present formulation is that the groundwater flow equation describing the aquifer behavior is transformed into a second-order differential equation by introducing an artificial variable φ. The two-dimensional, line and transition elements derived based on the weak formulation of this transformed equation possess symmetric matrices. In the formulation of the line elements φ and its derivative in η direction are retained as primary variables. This permits modelling of sudden changes in aquifer width. The transition elements provide a natural connecting link between the two-dimensional elements and the line elements. The line elements provide an efficient means of modelling aquifers with unidirectional flow. Numerical examples are given. A comparison of the results obtained here with the Galerkin finite element solution (nonsymmetric formulation) clearly demonstrates the superiority of the formulation presented here. 相似文献