In this dissertation , patran is used as the pre - processing software , the interface routine of the finite element updating program and the current engineering finite element softwares is programed using pcl language , and the finite element model updating is thus accomplished 本论文使用patran做前处理,并基于patran的二次开发,使用pcl语言编写出有限元模型修正程序与现有工程有限元软件的接口程序,完成有限元模型修正。