轮式拖拉机悬挂农具机组动态纵向稳定性研究

为降低轮式拖拉机及其悬挂农具机组在丘陵山地作业时发生翻倾和滑移事故的可能性,对机组动态纵向稳定性进行了研究.首先,基于理论力学分析了机组在匀速上坡、匀速下坡和加速上坡3种不同工况下的动态纵向稳定性,建立了表征机组动态纵向稳定性的翻倾角和滑移角数学模型;然后,通过SolidWorks建立机组的三维实体模型,导入ADAMS...

Research on Dynamic Longitudinal Stability of Tractor Unit

The dynamic longitudinal stability of tractor unit was studied in terms of safety accidents such as rollover and slippage that may occur when the entire unit of the wheeled tractor and its suspended agricultural implements is working on hilly slopes.First,based on theoretical mechanics,the dynamic longitudinal stability of the unit under different operating conditions such as constant speed uphill,constant speed downhill and acceleration uphill was analyzed,and the mathematical model of longitudinal maximum tilt angle and slip angle characterizing the dynamic longitudinal stability evaluation index of the unit was obtained.Then the three-dimensional solid model of the unit was established through SolidWorks,and the three-dimensional solid model of the unit was imported into ADAMS.After setting the relevant parameters and data processing of the unit,a virtual prototype model of the unit was obtained.Finally,the longitudinal dynamic stability of the unit was simulated and analyzed based on virtual prototype technology.The research results show that the unit’s maximum tilt angle is only related to the position of the center of gravity at constant speed up and down the slope,and the slip angle depends on the road surface adhesion coefficient and the wheelbase of the front and rear wheels;when accelerating uphill,the unit′s maximum tilt angle and the unit′s center of gravity position,acceleration and gravity are related.This paper provides a reference for reasonable configuration and safe use of tractor unit structure parameters.