有限元模型比知识的获取和形式化是有限元模型化专家系统建立的核心。本文以信息论为工具,在总结大量工程经验和理论研究成果的基础上,建立了工程结构模型化知识系统,它分为两个层次,一是复杂结构模型化,二是简单结构模型化。后者是前者的基础,包括力学模型化、有限元模型化和网络生成三部分。这些知识均已溶人了作者开发的专家系统之中。 The acquisition and formalization of the finite element model ratio knowledge is the core of the establishment of the finite element modelling expert system. This paper uses information theory as a tool to build up a knowledge model of engineering structure modeling on the basis of summarizing a large number of engineering experiences and theoretical research results. It is divided into two levels, one is the modeling of complex structures and the other is the modeling of simple structures. The latter is the basis of the former, including three parts: mechanical modeling, finite element modeling, and network generation. This knowledge has been dissolved in the expert system developed by the author.