基于ADAMS的前桥摆转式四轮底盘仿真分析

Simulation Analyses of Four-Wheel Front Wheel Drive Chassis of Front Axle Swing Steering Based on ADAMS

水田前桥摆转式四轮行走底盘,可以在水田作业时直接作倒U形转弯调头进入下一畦,具有结构简单、转弯半径小等优点。为提高前桥摆转式拖拉机底盘设计的效率与可靠性,在ADAMS中建立了基于虚拟样机技术的简化底盘模型,并对其进行运动学分析,得出各运动状态下的轮胎运动轨迹。仿真结果表明,轮胎与地面动摩擦系数和底盘运动速度对所需地头宽度有较大影响。虚拟样机方法面向多领域,可避免复杂的人工建模和求解过程,仿真逼真且接近实际系统,为底盘物理样机的研制提供依据。为后续的动力学分析提供依据。

Four-Wheel Front Wheel Drive Chassis of Front Axle Swing Steering can turn around as inverted U-shape into the next rectangular pieces of land in a field.Its structure is simple and the turning radius is small.In order to the efficiency and reliability of the design,a simplified model based on virtual prototyping technology is built to make kinematic analysis and find out the tire trajectory in different motion state.Simulation results show that coefficient of kinetic friction between the tires and ground and the speed of the chassis can impact the width of headland.Virtual prototyping methods faced to multi-field can avoid complex artificial modeling and solving process.The simulation can provide basis for the development of chassis,because it＇s realistic and close to the actual system.