Analysis of parameter change propagation is essential to ensure the consistency of the product’s integrated content as well as to capture the contextual impacts of a change proposal in variant product design. In this regard, a correlation-based approach is presented in this paper. The propagation of parameter change from one component to another in a product as well as from one key structure to another inside a component are studied. Firstly, a data flow model for change propagation as well as the basic units in parameter change propagation is proposed to illustrate the hierarchy and logical correlations between parameters. Then, change propagation network from the perspective of assembly is constructed by introducing “and” operation into the process. Change propagation coefficient is used to describe the change cost, based on which the optimal propagation path between components is selected. Thirdly, matrices are used to describe the correlation between parameters in different components. By introducing inner product into those matrices, change propagation path between parameters in different components can be obtained. Fourthly, the changed components are taken as the studied objects. Parametric correlation graph as well as quantitative expressing method is used to illustrate the parameter linkage inside the components. A searching method for parameter change propagation path inside components based on component modeling process is developed. Finally, the effectiveness of this method is verified by an example of an injection molding machine. The result confirms that our method can provide accurate estimation for the transfer process of the initial parametric change from macro-parameter changes in product to micro-parameter changes in components.

参数变更传播的分析对于确保产品集成内容的一致性以及捕获变更建议在变型产品设计中的环境影响至关重要。在这方面，本文提出了一种基于相关性的方法。研究了参数变化在产品中从一个组件传播到另一个组件，以及从一个键结构传播到组件内部的另一个组件的过程。首先，提出了一种用于变化传播的数据流模型以及参数变化传播的基本单元，以说明参数之间的层次关系和逻辑关系。然后，通过在过程中引入“与”操作，从组装的角度构建变更传播网络。变更传播系数用于描述变更成本，以此为基础，选择组件之间的最佳传播路径。第三，使用矩阵来描述不同组件中参数之间的相关性。通过将内积引入那些矩阵中，可以获得不同组件中参数之间的变化传播路径。第四，将变化后的成分作为研究对象。使用参数相关图和定量表示方法来说明组件内部的参数链接。提出了一种基于零件建模过程的零件内部参数变化传播路径的搜索方法。最后，以注塑机为例验证了该方法的有效性。