基于ADAMS的轮式拖拉机行驶平顺性研究

基于Pro/E软件平台,构建拖拉机-座椅悬架系统简化的几何模型,并将其导入ADAMS软件,编写轮胎属性文件与路面激励文件,构建拖拉机-座椅-路面系统的虚拟样机。针对不同的行驶速度与路面激励,对拖拉机的行驶平顺性进行仿真分析,探究行驶速度与路面激励对拖拉机平顺性的影响。结果表明,行驶速度与路面激励不平度对拖拉机行驶平顺性具有重要影响,以较高车速行驶时,驾驶员垂直方向振动强度明显高于较低车速的振动强度;在粗糙路面上行驶时,驾驶员的主观振动感明显强于平坦路面的振动感。增设座椅悬架系统改进拖拉机座椅结构,探究增设座椅悬架系统对行驶平顺性的影响,结果表明,增设座椅悬架系统可以明显降低其垂直方向的振动幅度,避开人体内脏器官和脊椎系统振动敏感频率区域,提高拖拉机行驶的平顺性。

Riding performance of wheeled tractor based on ADAMS

Simplified geometric model of the wheeled tractor-seat suspension system was constructed based on the software of Pro/E.The geometric model was then imported into ADAMS.The documentations of the tire property and road excitation were edited in ADAMS.The virtual prototype of tractorseat-road system was established.The ride comfort of the tractor under different driving speeds and road excitations was simulated to explore the effects of speed and road excitation on the tractor riding comfort.The results show that the vehicle speed and road unevenness have huge impact on the ride comfort of tractor.The vertical vibration intensity of driver under the high driving speed is significantly higher than that under the lower driving speed.The subjective vibration sense of driver on the rough pavement is much stronger than that on the flat surface.The influence of the seat-suspension system on the riding performance was investigated.The results show that the seat-suspension system can significantly reduce the vibration amplitude of the vertical vibration and avoid the sensitive vibration frequency areas of the body's internal organs and spine system.The riding performance was improved as well.