Fatigue Performance Analysis on Front Cantilever Beam of Ship Unloader based on Finite Element Method

To address the issue of inaccurate or unrealistic optimization results caused by traditional multi-objective process parameter optimization models, in this article, the fatigue performance of the cantilever beam structure in front of a ship unloader is analyzed based on finite element analysis. The fatigue cracking section of the front cantilever beam structure of a bridge grab ship unloader is selected as the research object in the article, and a finite element model is constructed by using the ANSYS Workbench software. Through the finite stress analysis, the fatigue life of the front cantilever beam structure of the ship unloader under different working conditions is obtained, among which the fatigue life of the grab bucket at the root position of the front tie rod is the smallest. Under the condition of minimum fatigue life, the front cantilever beam structure exhibits stress concentration, and the fatigue strength of some calculation points fails to meet the relevant specification requirements. This analysis confirms the effectiveness of the finite element method in predicting the fatigue performance of the cantilever beam structure in front of the ship unloader, revealing the weak fatigue areas of the structure and providing important references for subsequent structural optimization.