基于UG二次开发的参数化建模方法在优化设计中的应用

 在涉及几何模型优化的工程设计问题中，目前常用的两种参数化建模方法在流程自动化或处理复杂外形的模型时存在不足。本文根据含有几何建模环节的优化任务的特点和要求，提出了一种基于UG二次开发的参数化建模方法。采用UG/Open API的外部模式结合MFC开发了模型更新程序。程序利用外界的输入参数更改模板文件中的表达式，进而更新模板产生新的几何模型，并对外输出必要的几何特征参数。该程序可以脱离UG环境独立运行，能够方便地被第三方优化平台所集成。在优化任务中，该程序作为一个黑盒参与分析过程，以设计参数作为输入，几何模型和几何特征参数作为输出。实例检验结果表明，该方法和模型更新程序用于工程优化设计具有可行性和有效性，通过进一步开发，它还可以作为一个参数化建模模块用于CAE系统或多学科设计优化体系。

Applications of Parametric Modeling Method Based on Secondary Development of UG in Optimization Design

In engineering design problems involving the geometrical model optimization, the current two methods used in the parametric modeling suffer some drawbacks in the process of automation and complex geometry treatment. According to the characteristics and requirements of the optimization task with the geometry modeling link, a parametric modeling method based on secondary development of UG is proposed. A model-updating program is developed with UG/Open API external mode and MFC. A new geometry model is created by modifying the expressions and updating model of the template file with external parameters, and the necessary characteristic geometric parameters are exported. The program can be run independently without UG environment and integrated in a third-party optimization platform, with the analysis process in the optimization task as a black box, the design parameters as input data and the geometrical model and characteristic geometric parameters as output data. The example shows that the method and the program can effectively applied to engineering optimization design. It can also be used in a CAE system and multidisciplinary design optimization framework as a parametric modeling module.