Based on AAR, BS, IIW, ASME and other standards for fatigue analysis,a railway wagon welded structure fatigue life prediction special software was studied. The software was planned as seven core modules, such as Verity method, structural stress reverse method etc., and the collaborative network database systems and common standards support systems were constituted key elements of the software systems. Software based on nested mesh-insensitive structural stress of technology, and mathematical model of the master S-N latest Verity method; formula for AAR standards of structural stress in reverse was derived,the mathematical expression of load strength and structural damage factors was defined;SQL-Server, Access database and ADO technology were used to achieve the network database support. Finally, four-axis welding clamp car bogies as an example were used to prove the validity and usefulness of the software system.

基于AAR、BS、IIW、ASME等疲劳分析标准,研发了铁路货车焊接结构疲劳寿命预测专用软件。软件被规划为Verity法、结构应力反求法等7个核心模块,并协同网络数据库系统及通用标准支持系统,构成了软件系统的关键要素。软件中嵌套了基于网格不敏感结构应力技术和主S-N曲线数学模型的最新Verity方法;推导了基于AAR标准的反求结构应力解析式,定义了载荷作用强度及结构损伤因子的数学表达;运用SQL-Server、Access数据库及 ADO技术实现了网络数据库支持。最后以钳夹车四轴焊接转向架为例,证明了该软件系统的有效性及实用性。

货车设计, 焊缝疲劳, Verity方法, 反求推导, 网络数据库