Optimization of Design Change Propagation Path for Mechanical Product Considering Component Complexity

Aiming at the problem of multi-source design change of the mechanical products, an approach to search change the optimal path based on directed weighted complex network was proposed. Based on the complex network theory, the change propagation model is constructed with parts as nodes and FBS correlation between parts as network edges. The change propagation intensity was evaluated by the three variables of node importance, component complexity and change propagation probability of the component network, which was taken as the side weight of the component design change propagation network. Therefore, the directed weighted component network model was established. Multiple components were selected as initial change nodes, the consumption capacity of the design change margin of each node was evaluated, and the multi-source design change propagation optimization model was solved by the improved bat algorithm to obtain the optimal change propagation path. Finally, the feasibility of the method is verified by taking the multi-source design change of the truck crane.