Research on Reusable Design Method Based on 4D Information ModelWU Xiang~1,FAN Gang-long~2,MAO Wei-jun~1,LI Gang-yan~1(1.School of Mechanic and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China;2.Department of Computer Science and Engineering,Pingdingshan Institute of Technology,Pingdingshan 467001,China)The structure and characteristics of 4-dimension information model was introduced,the method of design resource modeling was studied.Based on them,the theory and method of design reusing was studied.The filter using similarity factor computing as basic method was introduced.The preliminary application of this method in product design process was studied,combined with the eddy current retarder.4D information model;design resource modeling;reusable design;similarity factor