英文文献有限元分析软件的发展.doc

Developing a Finite Element Analysis Agent Padmanabh Dabke Introduction Recently there is a trend towards using it in the early stages of design. A designer may use FEA just to validate the structural integrity of a design or she may use it for structural optimization along with the parametrized design techniques.This paper examines the requirements of a structural analysis agent and proposes an architecture to facilitate FEA in a concurrent design environment. The next section briefly describes how FEA is used in a typical industrial set up.Section 3 presents a survey of existing FE tools. Section 4 discusses some issues related to the development of an FEA agent. Section 5 proposes an architecture for the FEA agent that addresses the issues described in Section 4 and finally Section 6 presents the concluding remarks. Steps in Finite Element Analysis The process of FEA starts with identification of the region of interest and the formulation of the physical problem。[1]. The region of interest might be an assembly, a component or a portion of a component (or an assembly). The interaction of the rest of the assembly and the environmental conditions with the region of interest is captured in two ways. One way to represent this interaction is to idealize them as loads and displacement constraints on the region of interest. For example a spot weld fixing a component to a bigger structure will result in a constraining all the degrees of freedom at that point. The other commonly used method is to use spring and/or gap elements. Analysts often draw a Free Body Diagram of the region of interest to clarify its interaction with the rest of the assembly and to gain more insight into its structural behavior.Required components and assemblies are then retrieved from the Solid Modeling system into the finite element package.In recent years a number of commercial systems have started offering both: FEA and Solid Modeling capabilities. In this case, the data exchange may occur b