创建压缩机叶片有限元分析模型的方法

压缩机叶片是由复杂的自由曲面包络而成的零件,在对其进行有限元分析之前需建立CAD实体模型。针对常规建模方法中CAD模型转化为CAE模型所出现的问题,提出在建立叶片的CAD实体模型前,先对叶片截面型线内、外弧的型值点进行预处理,并将叶片各截面型线分成多段,从而建立面向有限元分析的CAD实体模型。建立的叶片实体模型通过标准图形接口和专用数据接口传递,结果表明除IGES格式外,其他均能较好导入ANSYS软件中,其中以Parasolid格式和Pro/E接口为最佳。通过采用该方法,对某型号的压缩机叶片进行有限元建模,可以很好地实现在CAD下所建实体模型转化为有限元分析所需要的几何模型。

Method of Creating Compressor Blade Finite Element Analysis Model

The compressor blade is consisting of complex Free piece of bread collateral, when do an finite element analysis, a CAD model should be created fist. The paper aimed at those problems that came with the procedure of transforming CAD model into CAE model in the general modeling method. Before creating a CAD solid model of the blade, we should give a pre--processing for the blade section profile and positive value points, at the same time, cut the blade section curves into several segments, and can successfully creat an finite element analysis--oriented CAD entity model with this manner. Standard graphic interface and private data interfaces can be used for transmitting in the entity model, the results show us clearly that all format can be inducted into the ANSYS software except IGES, besides, the Parasolid format and the Pro/E interface work better. At last, this manner was applied with an specific models at the process of finite element, the results indicated this manner works well when transforming CAD model into geometric model that finite element analysis need.