Abstract
In order to solve the problem of vigorous vibration of agricultural machinery frames, taking a vegetable precision seeder as an example, the concept of vibration reduction was proposed. The modal analysis of the frame was carried out, and the accuracy of the finite element model was verified by comparing the modal test of multipoint input and multipoint output (MIMO) and simulation results. Additionally, the main frequency of engine vibration was the main excitation source of frame resonance. According to the modal shapes, it was proposed to increase the fixed beam structure and to carry out simulation tests. The time-domain signal of the maximum deformation position in the first-order vibration mode was measured, and the vibration spectrum analysis maps before and after optimization were obtained by Fourier transform. A field experiment showed that the seeding quality of the whole machine was significantly improved after optimization. This study provides a reference for the analysis of vibration characteristics and the vibration reduction design of the agricultural machinery equipment.
Highlights
Due to the large number of working parts and large vibration of agricultural machinery, it is easy to resonate with the frame, resulting in low reliability and fatigue damage
In order to solve the problem of violent vibration of the agricultural machinery frame, taking the frame of vegetable precision seeder as an example, this paper explored an effective method from the aspects of the vibration characteristic solution, resonance traceability, structure optimization, etc
Optimization and Analysis of Frame According to the first-order vibration characteristics and modal shapes of the frame, we proposed to increase the first natural frequency by adding a fixed beam structure on the armrest bracket to avoid the excitation range of the engine and to effectively avoid
Summary
Due to the large number of working parts and large vibration of agricultural machinery, it is easy to resonate with the frame, resulting in low reliability and fatigue damage. There are many kinds of agricultural machinery, but the overall configuration is composed of the engine, walking parts, working parts, and frame. Many power devices are installed on the frame to reduce labor intensity, but the vibration of the power device is transmitted to the frame causing a large disturbance of the population in the seeder equipped on the frame, reducing the success rate of series processes such as seed filling, seed protection, and seed feeding. It is easy to cause fatigue damage in the weak links of the whole machine structure, affecting work reliability [4]
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