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为改善矿用重载车辆的转向特性,降低轮胎的磨损程度,基于车辆四轮转向理论建立了某无驱动桥矿用重载车辆转向机构的参数化仿真模型,并采用ADAMS对模型进行运动学分析。以机构中关键铰接点的3个坐标值为设计变量,同侧轮胎转角的差值以及内外轮胎转角之间的理想数学关系作为目标函数,对转向机构进行了单目标设计研究和多目标函数优化设计。结果表明,优化后的内外轮胎转角实际值与理想值误差减小了约2%,同侧前后轮胎转角差值减小了约78%,转向特性显著提高。
In order to improve the steering characteristics of heavy mining vehicles and reduce the wear degree of tires, a parametric simulation model of the steering mechanism of a non-driven heavy mining vehicle with a drive axle was established based on the four-wheel steering theory. The ADAMS model was used for kinematics analysis. Taking the three coordinate values of the key hinge points as the design variables, the difference between the tire angles on the same side and the ideal mathematical relationship between the inner and outer tire angles as objective functions, the single-objective design and multi-objective function optimization design. The results show that the error between the actual value and the ideal value of inner and outer tire corner is reduced by about 2%, the difference of ipsilateral front and rear tire corner is reduced by about 78% and the steering characteristic is significantly improved.