Hydraulic plunger pump plunger size optimization method considering influence of friction pair

The invention provides an aviation hydraulic plunger pump plunger size optimization method considering the influence of a friction pair, and belongs to the field of structure optimization design. The method comprises the following steps: firstly, performing simulation calculation to obtain a lateral pressure result under the consideration of friction pair friction influence; then designing a virtual test working condition by adopting a central composite test design method, carrying out test design on the inner diameter of the plunger and the neck diameter of the plunger, and carrying out simulation calculation on test design points to obtain a maximum lateral pressure result of the plunger; constructing a global approximation model through a response surface method based on a simulation result, and obtaining a function relationship between the lateral pressure of the plunger and the inner diameter of the plunger and the diameter of a ball head; and finally, optimizing by using a Newton iteration method to obt