摘要
以CF700型拖拉机为研究对象,以MATLAB/SIMULINK为研究平台,建立了带驾驶室拖拉机4自由度振动仿真模型。以GB/T 10910—2004中较平滑跑道为激励,对拖拉机振动特性进行了仿真研究,在此基础上得到驾驶室前、后悬架刚度和阻尼系数。研究结果表明,驾驶室前、后悬架刚度和阻尼系数分别取20 k N/m,1 233 N·s/m和20 k N/m,1 726 N·s/m时,座椅处垂向振动加速度均方根值和驾驶室俯仰振动加速度均方根值分别较无驾驶室悬架时减小50%和61%,拖拉机的乘坐舒适性明显改善。
CF700 tractor was taken as the research object,and the 4-DOF vibration model of cab suspension was then built based on MATLAB/SIMULINK. The vibration characteristics of tractor were simulated by using the smoother road as an excita- tion in GB/T 10910--2004. The relationship between the vibration characteristics and the suspension stiffness, damping ratio was obtained. The results show that RMS of vertical vibration-acceleration of the seat, and pitch vibration-acceleration of the cab reduce by 50% and 61% respectively compared with that without suspension structures when the stiffness and damping co- efficients of the front and the rear suspensions are 20 kN/m, 1 233 N·s/m and 20 kN/m, 1 726 N·s/re. So, ride comfort of the tractor is improved significantly.
出处
《机械设计》
CSCD
北大核心
2015年第5期71-77,共7页
Journal of Machine Design
基金
国家自然科学基金资助项目(51275249)
关键词
拖拉机
振动特性
驾驶室悬架
刚度
阻尼系数
tractor
vibration characteristic
cab suspension
stiffness
damping coefficient
