Abstract: An approach to automatically converting a design feature model to an analysis feature model for downstream finite element analysis is proposed.In the approach,the design feature model is first decomposed into a set of remnants of additive features,each of which represents part of an additive feature's volume that remain in the final volume of the design model.The remnant of each additive feature is then decomposed into swept bodies and non-swept bodies.After that,the candidate analysis regions of each swept body are effectively determined based on its contour information.These detected candidate regions may be wrongly recognized,so,together with potentially missing ones,they are thus detected and corrected by a synthesis process.Finally,the analysis features and their relative interfaces are generated,which ultimately gives the corresponding analysis feature model to the input design feature model.Experimental results are also shown to demonstrate the proposed method's effectiveness.