The stability of a high clearance sprayer (HCS) can be considered in developing modern agriculture. We built a three-dimensional dynamics model of HCS with road excitation considering the influence of complex terrain on the whole vehicle vibration. The numerical simulation method was proposed to solve differential equations based on the Newmark-ß method. The response curves of whole vehicle in the time and frequency domain response were analyzed. The simulation results show that the vibration amplitude difference of left and right wheel is bigger than amplitude difference of right and rear wheel. The average amplitude of roll motion is bigger than pitching motion. The reason is that since the man-machine seat is set on the left of whole vehicle, an additional roll torque is brought. Besides, the displacement amplitude of whole vehicle is bigger than man-machine seat. The reason is that the vibration absorption system of seat can reduce vibration effectively. In amplitude-frequency response curves, the multiple resonance points occur with the road excitation given in this paper. The maximum response amplitude of angle velocity and acceleration of pitching motion is bigger than roll motion. This study has an important theoretical and practical value for structure dynamic optimization of HCS.

在发展现代农业时，可以考虑使用高净距喷雾器（HCS）的稳定性。考虑到复杂地形对整车振动的影响，我们建立了具有道路激励的HCS三维动力学模型。提出了一种基于Newmark-ß方法的数值模拟方法，用于求解微分方程。分析了整车在时域和频域响应中的响应曲线。仿真结果表明，左右车轮的振动幅度差大于前后轮的振动幅度差。侧倾运动的平均振幅大于俯仰运动。原因在于，由于人机座椅位于整车的左侧，因此带来了额外的侧倾扭矩。除了，整车的位移幅度大于人机座椅。原因是座椅的减震系统可以有效地减少振动。在幅频响应曲线中，随着本文给出的道路激励，出现多个共振点。角速度和俯仰运动加速度的最大响应幅度大于侧倾运动。该研究对HCS的结构动力学优化具有重要的理论和实践价值。