Analysis of test model and finite element model of the frame and handle of stump cutting machine

The objectives of this study were to clarify the vibration characteristics of the frame and operation handle of the stump cutting machine, and to establish a reasonable simulation model. Using the professional modal testing system with post-processing software and CAE software (Ansys Workbench), we carried out model test and finite element analysis of the frame and operation handle, and compared their results. The results of model test and finite element analysis can well match each other. For both methods, the error of natural frequency in the first six stages can be controlled within 10%, and the mode of vibration for each stage is basically the same, suggesting that the results of the model test and the finite element analysis can well reflect the actual characteristics of structural vibration. The finite element mode built for the frame and operation handle has a high credibility that it can be used trustingly in statics and dynamics analyses. The link part between the front of the frame and the cutter head shaft, as well as the holding part in the handle, are prone to large amplitude of vibration. Measures like adding vibration isolation material, changing rigid connection to elastic one, and increasing the fatigue strength of vulnerable parts, can be taken to isolate and decrease vibration.