ISO 10303 STEP AP209 edition 2 ISO (1994), ISO (2014a)[1,2] is a data model standard intended for data exchange and storage of simulation information. The standard has a wide coverage of FEA (Finite Element Analysis) information, but is missing certain features such as nonlinear FEA. This paper gives an introduction to the STEP AP209 standard and presents projects in which AP209 has been implemented.

The study then identifies requirements that should be supported by a standard FEA data model, but are not fully covered by AP209. Each requirements are discussed in the context of how they are supported by existing major solver applications. Without giving detailed solutions for how these should be implemented in AP209, starting points for further research is suggested.

ISO 10303 STEP AP209版本2 ISO（1994），ISO（2014a）[1,2]是旨在用于数据交换和模拟信息存储的数据模型标准。该标准涵盖了有限元分析（FEA）信息，但是缺少某些功能，例如非线性FEA。本文介绍了STEP AP209标准，并介绍了已实施AP209的项目。

然后，研究确定了标准FEA数据模型应支持的要求，但AP209未完全涵盖这些要求。在现有主要求解器应用程序如何支持它们的上下文中讨论了每个需求。在没有给出如何在AP209中实现这些方法的详细解决方案的情况下，建议进行进一步研究的起点。