关键词: 知识获取, ANSYS分析数据, 动力头设计, 正交试验, 粗糙集理论

Abstract: This paper mainly discusses how to obtain design knowledge from the finite element analyzed data.With regard to one design problem，the orthogonal experiment table is established according to diverse values of design variables，and variables in each kind of experimental schemes are built by the entity model of Pro/Engineer software and then the entity model is analyzed by ADAMS in order to obtain design parameters which satisfy design need.The data of different characteristics collected from the stress analysis and other relative computation data constitute a new two-dimensional form from which design knowledge is extracted by using the rough set theory.This method of knowledge acquisition is tested by the analysis of the data from driving head of hydraulic drill.The test shows that the method obtains three strong associate rules for the design of driving head，which is applicable.The experiments prove that this method of knowledge acquisition is correct and effective and can also be used as guidance for extracting design knowledge from other engineering analyzing software.

Key words: knowledge acquisition, ANSYS analyzed data, design for driving head, orthogonal experiment, rough set theory