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
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摘要
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.
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.
引文
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[14]鲁云松,朱明,陈海军,等.二自由度振动筛运动学分析及仿真试验[J].华中农业大学学报,2017,36(3):107-112.
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[16]李耀明,孙朋朋,庞靖,等.联合收获机底盘机架有限元模态分析与试验[J].农业工程学报,2013,29(3):38-46.
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[19]谢斌,鲁倩倩,毛恩荣,等.基于ADAMS的联合收割机行驶平顺性仿真[J].农机化研究,2014,36(11):38-41.
[20]贾进峰,张进秋,张建,等.基于路面谱随机激励的履带车辆舒适性仿真研究[J].系统仿真学报,2012,24(6):1350-1354.
[21]李守斌.联合收割机的作业速度如何确定[J].农机安全监理,2001(5):44.
[22]中国农业机械化科学研究院.农业机械设计手册(下册)[M].北京:中国农业科学技术出版社,2007.
[23]陈勇,朱思洪,马然.拖拉机振动对驾驶员舒适性影响的试验研究[J].拖拉机与农用运输车,2013(5):13-15.
[2]董霜,朱元清.环境振动对人体的影响[J].噪声与振动控制,2004,24(3):22-25.
[3]周孔亢,陆建辉,侯永涛,等.基于RecurDyn的钢板弹簧动力学模型的建立与参数辨识[J].机械工程学报,2014,50(4):128-134.
[4]毛君,张瑜,刘占胜,等.间隙条件下刨煤机刨头接触碰撞动态特性研究[J].振动与冲击,2015,34(19):224-229.
[5]李耀明,陈劲松,梁振伟,等.履带式联合收获机差逆转向机构设计与试验[J].农业机械学报,2016,47(7):127-134.
[6]药晓江,高峰,周煜,等.可变直径轮全地形车辆越障性能分析[J].农业机械学报,2013,44(2):6-11.
[7] BAE J J,KANG N.Design optimization of a mecanum wheel to reduce vertical vibrations by the consideration of equivalent stiffness[J].Shock&vibration,2016(4):1-8.
[8]徐飞军,黄文倩,陈立平.履带拖拉机软土地行走动力学仿真[J].农机化研究,2009,31(12):204-207.
[9]陈安成,穆希辉,杜峰坡,等.基于RecurDyn的小型履带车的建模与仿真[J].机械设计,2013,30(10):36-39.
[10]EHTONEN T J,JUHALA M.Predicting the ride behaviour of a suspended agricultural tractor[J].International journal of vehicle systems modelling and testing,2005,1(1/2/3):131-142.
[11]HATTON B,GAGNOL V,BOUZGARROU B C,et al.Modelling and simulation of an harvester head mechanism[J].Mechanics&industry,2017,18(3):309.
[12]张宗玲,韩增德,李树君,等.玉米穗茎兼收割台切割夹持输送装置仿真与试验[J].农业机械学报,2016,47(S1):215-221.
[13]周杰,徐红梅,王君,等.基于ADAMS的轮式拖拉机行驶平顺性研究[J].华中农业大学学报,2017,36(3):93-100.
[14]鲁云松,朱明,陈海军,等.二自由度振动筛运动学分析及仿真试验[J].华中农业大学学报,2017,36(3):107-112.
[15]刘义.RecurDyn多体动力学仿真基础应用与提高[M].北京:电子工业出版社,2013.
[16]李耀明,孙朋朋,庞靖,等.联合收获机底盘机架有限元模态分析与试验[J].农业工程学报,2013,29(3):38-46.
[17]KUMBHAR P,XU P,YANG J.Evaluation of human body response for different vehicle seats using a multibody biodynamic model[J].AE technical paper,2013(1):994.
[18]罗竹辉,魏燕定,周晓军,等.随机激励三维路面空间域模型建模与仿真[J].振动与冲击,2012,31(21):68-72.
[19]谢斌,鲁倩倩,毛恩荣,等.基于ADAMS的联合收割机行驶平顺性仿真[J].农机化研究,2014,36(11):38-41.
[20]贾进峰,张进秋,张建,等.基于路面谱随机激励的履带车辆舒适性仿真研究[J].系统仿真学报,2012,24(6):1350-1354.
[21]李守斌.联合收割机的作业速度如何确定[J].农机安全监理,2001(5):44.
[22]中国农业机械化科学研究院.农业机械设计手册(下册)[M].北京:中国农业科学技术出版社,2007.
[23]陈勇,朱思洪,马然.拖拉机振动对驾驶员舒适性影响的试验研究[J].拖拉机与农用运输车,2013(5):13-15.
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