Abstract: Secondary development of I-DEAS software is specially studied，to realize the function of virtual simulation and analysis of weld fatigue using I-DEAS software.The I-DEAS software interface technology is realized by starting ORBIX services and utilizing the CORBA communication protocol；by calling Open I-DEAS secondary development libraries class，accessing to limited meta-data can be achieved.According to the actual engineering needs，taking I-DEAS software as the pre- and post-processing platform，based on the AAR standard and the Palmgren-Miner cumulative damage principle，a virtual simulation analysis module of weld fatigue is developed.Practical application is done using this module，and the result shows that based on the principle of I-DEAS software secondary development，a deeper level of the embedded software development can be achieved，so that the I-DEAS CAD software capacity can be enriched.

Key words: Integrated Design Engineering Analysis Software（I-DEAS）, secondary development, weld fatigue, virtual simulation

摘要： 为了在I-DEAS软件中实现焊缝疲劳虚拟仿真分析功能，对I-DEAS二次开发技术进行了专题研究。I-DEAS软件接口技术是通过启动ORBIX服务，运用CORBA通信协议实现的；调用Open I-DEAS二次开发类库，能够实现有限元数据的访问。根据工程实际需要，以I-DEAS软件为前、后处理平台，基于AAR标准及Palmgren-Miner累积损伤法则，开发了焊缝疲劳虚拟仿真分析模块。运用该模块，进行了实例应用，结果表明，以I-DEAS软件二次开发原理为基础，可以实现对该软件深层次的嵌入式开发，从而丰富了I-DEAS软件的辅助设计能力。

关键词: 综合设计工程分析软件（I-DEAS）, 二次开发, 焊缝疲劳, 虚拟仿真