Collision Simulation And Structural Optimization Of Trimming Bulldozer Based On Abaqus

Trimming Bulldozer always work in harsh conditions, endure to alteration loads, excessive loads, and frequently repeated operations, often occur in collisions with the cabin during operation. Crack, deformation and fracture damage often occur in H-frame during daily work. Especially, the crossbeam of H-frame is much more fragile than other parts, which had seriously influenced the development of the domestic industry. This thesis studies Trimming Bulldozer, run collision simulation based on Non-linear Finite Element Method, analysis the stress distribution, and carries out optimization based on surrogate model.This thesis includes six chapters. Chapter one presents the research background and significance of Non-linear Finite Element Method and collision simulation, and give an introduction to surrogate model. Chapter two discuses the theory of Finite Element Method and optimization based on surrogate model. Chapter three builds FEM model and validate the model with test data. Chapter four discuses the sensitivity analysis and analyze the variables to determine the most important impact factors. Chapter five, determine the experimental data by using the orthogonal experimental design, then apply the surrogate model, analysis two models, choose the most accurate model and search the global optimal solution of this models with genetic algorithm. Chapter six makes the conclusion and gives research work of the next step.