基于刚柔耦合虚拟样机模型的收获机振动舒适性仿真分析
Simulation analysis of vibration comfort of combine harvester based on rigid flexible coupled virtual prototype model

采用SolidWorks、有限元分析软件与RecurDyn相结合的方式建立收获机的人 机 路面系统的刚柔耦合虚拟样机模型，以驾驶员全身振动加权加速度均方根值为评价指标，仿真模拟收获机在水稻、小麦以及油菜田行驶时的振动舒适性。结果表明，行驶速度、路面硬度、竖割刀的添加对收获机振动舒适性影响较大，路面硬度越大、收获机行驶速度越快，人体的主观不舒适性感受就越强烈；竖割刀的添加增强了人体的不舒适感。
A rigid flexible virtual prototype model of the man machine pavement system of the harvester was established by combining finite element analysis software with the software of SolidWorks and RecurDyn.Weighted root mean square values of acceleration was used to evaluate the vibration comfort of the harvester.On the basis of the virtual prototype model of the system,the vibration comfort of the harvester was simulated when it harvests the rice,wheat and rapeseed.The results showed that the driving speed,the road surface hardness and the vertical cutting knife influence the vibration comfort of the harvester greatly.With the increase of driving speed of the harvester,the weighted acceleration RMS of the mass center of human body in different axis and the whole body vibration acceleration RMS increased rapidly,enhancing the subjective discomfort feeling of the driver.In addition,the vertical cutting knife enhanced the discomfort feeling of the human body.The subjective discomfort feeling of the drive enhanced with adding the vertical cutting knife