面向对象的航空发动机装配模型

Object-oriented aero-engine assembly models

为了对复杂产品的数字化装配设计提供有效的支持,首先对产品装配建模方法研究工作进行了归纳分析,指出面向对象的建模方法是目前最合适的复杂产品装配建模方法。然后采用对象类图建立了复杂产品装配元模型,描述了产品装配过程中的主要对象类及其关系,集成表达了产品结构、装配特征、装配关系、工艺方案等信息,为数字化装配设计提供了全面的支持。最后通过对象匹配方法,将复杂产品装配元模型转化为航空发动机装配的对象模型,并以燃气涡轮发动机的涡轮转子为例,对其装配结构构成、数据衍变关系及建模方法进行了说明。将所建立的面向对象的航空发动机装配模型直接用于数字化产品装配系统的开发,并进行了应用验证。

In order to provide effective support for digital assembly design of complicated products,previous studies on product assembly modeling were firstly summarized and analyzed.It was pointed out that object-oriented modeling was the appropriate product modeling approach at present.Subsequently,a meta-model of product assembly was constructed by using the class diagram.Major assembly object classes and their relationships were described.In the meta-model,all product information such as structure,assembly feature,assembly relationship and process scheme were integrated to support digital assembly design.Finally,the class-diagram based product assembly model was converted into a generic object model for gas turbine engine aero-engine assembly through object mapping method.An example of turbine rotor was provided to specify the assembly structure,data evolution relationship and modeling method.Furthermore,these assembly models served as kernel requirement specifications for the development of a digital product assembly planning system.