The Effect of Surface Treatment in Local Zone on Modal Frequency of Thin Plate Structure

Thin plate structures were widely used in aircraft and aero engines, such as compressor blades, engine casing, wall panels, etc., and their vibration problems were serious. The study found that the surface treatment will affect the local stiffness, which in turn affects the modal frequency of the structure. Based on the theoretical analysis of local variable stiffness thin plate structure vibration, the effect of surface treatment was simulated and analyzed by ABAQUS through a diamond-shaped thin plate model. The influence of the position of the stiffness variation zone on the modal frequencies for different modal characteristics was studied. The sensitive zone of the frequency variation was obtained. This study provides a theoretical basis for analyzing the effect of surface treatment, and adjusting the modal frequency by surface treatment.