In order to solve the problem of stress concentration in bearing frame structure

the relationship between stress and pressure difference in a two-dimensional perforated plate was theoretically simulated using the stress flow concept. The result shows that the larger the stress value is

the larger the pressure difference is. Then a three-dimensional structure was simulated to explore whether it has the same phenomena. Finally

a method to evaluate bearing structure by means of differential pressure was proposed based on the above analysis

and it was used to evaluate an improved piston structure. The result shows that the method provides a new basis for reducing stress concentration in bearing structure from another perspective and expands the solution to the problem.