无驱动桥矿用重载车辆四轮转向机构运动学仿真及优化

Kinematic simulation and optimization of four-wheel steering mechanism of heavy-duty mining vehicles without driving axle

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 turning performance and reduce the wear of tires of heavy-duty mining vehicles,the paper establishes parameterization simulation model of the steering mechanism of a heavy-duty mining vehicle without driving axle based on the four-wheel steering theory,and uses ADAMS to carry out kinematic analysis.Furthermore,it also carry out single-objective design study and multi-objective functional optimization design on the basis of three coordinate values of key hinge points serving as design variables as well as the margin of tire turning angles at the same side and the ideal mathematical relationship between inside and outside tire turning angles serving as the objective function.The result indicates that the error between actual value and ideal value of turning angles of inside and outside tire declines about 2%,and the margin of tire turning angles at the same side declines about 78%.The turning performance has a great improvement.