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Natural frequency and modal analysis of tractor vibration system.
1School of Information Technology, Jiangsu Open University, Nanjing, 210036, China. nayuanjiaqi@126.com.
Scientific Reports
|September 27, 2025
Summary
This study analyzed tractor vibrations, finding that frame stiffness and component parameters significantly influence natural frequencies. Optimizing the tractor frame can reduce vibration amplitude and enhance operator comfort.
Area of Science:
- Agricultural Engineering
- Mechanical Engineering
- Vibration Analysis
Background:
- Tractor vibrations impact operator comfort and performance.
- Understanding natural frequencies and vibration patterns is crucial for design optimization.
Purpose of the Study:
- To investigate the natural frequency and frame vibration patterns of an agricultural wheeled tractor.
- To identify key parameters affecting tractor vibration characteristics.
- To propose optimization strategies for improving tractor comfort.
Main Methods:
- Derivation of theoretical natural frequencies for vertical and pitching vibrations using a two-degree-of-freedom planar model.
- Experimental testing of tractor vibration characteristics on a Class D road surface.
- Finite element analysis (FEA) of the tractor frame structure using ANSYS Workbench.
Main Results:
- Vertical and pitching vibrations are interrelated, influenced by tractor mass, inertia, tire stiffness, and wheelbase.
- Natural frequencies are concentrated in the 0-40 Hz range (engine operation) and 3-5 Hz (vibration system).
- The tractor frame exhibits modal vibration patterns, with identified weaknesses in stiffness distribution requiring design optimization.
Conclusions:
- Tractor vibration is significantly affected by mass, inertia, tire stiffness, and wheelbase.
- Frame optimization, including wheelbase and damping adjustments, can reduce vibration amplitude and improve comfort.
- A balanced stiffness design and enhanced end stiffness are necessary to mitigate vibration issues and maintain dynamic performance.
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