【摘要】 为提高田园管理车前悬架作业性能和稳定性,通过构建多功能田园车前悬架三维模型,并建立起伏路面的拟合曲线,在虚拟仿真软件ADAMS中建立前悬架参数化仿真模型,对前悬架进行优化。优化后:主销内倾角变化量从6.52°～8.23°降低到7.08°～7.53°,优化率为73.7%,主销后倾角变化量从3.80°～3.82°降低到2.68°～2.69°,优化率为50%,车轮外倾角变化量从0.18°～1.05°降低到0.18°～0.73,优化率为36.8%,前束角变化量从-0.43°～1.43°降低到0.04°～0.74°,优化率为62.4%;对上摆臂柔性化处理后进行动力学分析,得到节点4355为最大应力点,前6阶模态的频率可近似为0,实测中上摆臂的1阶固有频率为33 Hz左右,上摆臂不会出现共振;仿真与试验得到前悬架上摆臂与转向节连接处球铰点最大受力分别为3 984 N和4 180 N,二者相对误差为4.689%,上摆臂试验测得模态结果与仿真结果误差均值为4.56%,与实际较为吻合,本文研究结果可为田园管理车前悬架优化设计提供参考。更多还原

【Abstract】 In order to improve the performance and stability of front suspension of field management vehicle,by constructing a three-dimensional model of multi-function fields vehicle front suspension and establishing a fitting curve of the undulating road surface, parametric simulation model of the front suspension is established in the virtual simulation software ADAMS to optimize the front suspension. After optimization: the amount of change in the inclination of the kingpin was reduced from 6.52° to 8.23° to 7.08° to 7.53°, the optimization rate was 73.7%, the kingpin caster angle was reduced from 3.80°～3.82° to 2.68°～2.69°, the optimization rate was 50%, the kingpin caster angle was reduced from 0.18°～1.05° to 0.18°～0.73°, the optimization rate was 36.8%, the toe angle was reduced from-0.43°～1.43° to 0.04°～0.74°, the optimization rate was 62.4%. The kinetic analysis is performed after the upper arm is flexibly treated, and the node 4 355 is the maximum stress point, the frequency of the 1 mode natural frequency is approximate 33 Hz, and the upper arm does not have resonance in the first 6 modes obtained. The maximum force on the ball joint between the upper arm of the front suspension and the steering ball knuckle is 3 984 N and 4 180 N respectively, shown through simulations and test results, the relative error of the two is 4.689%, the mean error between the measured modal results and the simulation results is 4.56%, which shows that the simulation is in good agreement with the reality, the research results of this paper can provide reference for the optimization design of front suspension of pastoral management vehicle.更多还原