Track-type Undercarriage Parts Stress Numerical Simulation And Experimental Research

Track-type Undercarriage Parts is an important part of tracked vehicle, the equivalent of the entire machine 1/3 value in the entire life cycle of operation. Therefore, the life of the structure of chassis parts and wear life is crucial. For chassis parts life at the beginning of the design has been determined, so the design level of life played a decisive factor.At present, the crawler chassis parts are too complex, has not formed a complete and mature design theory. In practical application, only to refer to the design method of fuzzy design by past experience, a rough design by trial and error method, experiments were conducted to determine the feasibility of the design. The problem is often a product designed to take a very long time, and often redundant structure performance.In order to understand the mechanical properties of the crawler chassis parts and improve the design level in the design phase, but the simulation using finite element analysis software, the stress spectrum acquisition and in the actual work environment, the finite element model is verified by experimental data and results, and guide the optimal design of structures using numerical simulation technology. At the same time, compared with the existing formula or empirical formula, to improve the traditional design theory and method. The results of this study are as follows:1) according to the different condition of the bulldozer (soil conditions are divided into rock, soil, wetlands; working state can be divided into flat, uphill, downhill, side slope; divided into no-load, load conditions, a full tracked chassis) acquisition point, stress strain test data. The theoretical analysis and calculation of the load condition, provides the modeling and model validation data for finite element analysis.2) for three-dimensional modeling of important structural parts, input the finite element analysis software ANSYS, the actual input material properties, meshing, applied load, numerical solution. Through the finite element analysis results and experimental results were compared and analyzed to validate the finite element model and the simulation results.3) using the simulation model validation, strength analysis of the extreme conditions of the important structure, find out the position and stress is less dangerous position, through the strengthening of dangerous position, improve the safety factor, by weakening the stress smaller parts to reduce the cost of materials. Through the product structure of lightweight optimization design of structure.