Furthermore, based on the connection constraint on any inter-die signal, the capacity constraint on any assigned pad on dies and the crossing constraint between two inter-die signals, an integer linear programming-based (ILP-based) approach is proposed to assign all the inter-die signals to minimize the total wirelength in a die-stacking SiP design.
Due to the complexity for the working conditions of the part, the connection constraint domain will change with working conditions.
Therefore, the connection constraint position sizes can be selected as the main optimization variables in optimizing the sizes of bolt connection structure.
As seen from Figure 4, with the increasing load value ratio, the connection constraint domain is evenly distributed around the two sides along the x direction.
Take a machine tool spindle box as an example, the design of the connection constraint domain is obtained based on the above method, as shown in Figure 3.
In order to measure the effect of load, the connection constraint domain is optimized by varying the load value ratio F x /F y in the x and y direction, as shown in Figure 4.
That is because a national economic system is constructed of uncountable compositions including sections, industries, and departments, which means it is impossible to apply analysis on each part of these compositions from a microscale perspective, especially when the connections, constraints, and dynamic feedbacks between these compositions are taken into account.
Based on the proposed co-operative optimization method for light-weight design of complex structure parts in this paper, a gantry machining center bed part as an example is designed on its connection constraints, the main and sub-structure configuration and the feature sizes.
From Fig. 12, we can see that a topology designed using the combination method performs better than a topology designed using an integer linear programming (ILP) model with the equal degree and node connection constraints.
The connection between constraints and universal algebra has been looked at in, e.g., Jeavons, Cohen and Pearson, 1998, and has given interesting results.
