水田作业工况的拖拉机振动特性

为研究拖拉机在水田工况下的振动特性。该文采用轮胎滚动法测取南京江浦农场水田硬底层纵断面空间函数,对数据进行自相关性检验,分析硬底层垂直位移功率谱密度;以CF700型拖拉机（常发集团）为研究对象,基于轮胎-湿软水田土壤系统,建立水田工况下拖拉机三自由度振动微分方程和仿真模型,以水田硬底层纵断面时间函数为输入矢量,对拖拉机振动特性进行仿真研究,并将仿真结果与试验结果进行对比分析。结果表明,水田硬底层高程具有统计相关性,其不平度系数Gx（0.1）=316.7×10^-6 m^3,拟合指数w=-1.651;试验所得拖拉机前桥、后桥及座椅椅面垂向振动频率分别是2.91、3.6及2.5 Hz,与仿真结果相...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. 11; pp. 31 - 38
Main Author 朱思洪 马佳富 袁加奇 徐刚 周永清 邓晓亭
Format Journal Article
LanguageChinese
Published 江苏省智能化农业装备重点实验室，南京 210031 2016
南京农业大学工学院,南京,210031%南京农业大学工学院，南京 210031
Subjects
农业机械
功率谱密度
拖拉机
振动频率
水田工况
硬底层
试验
PSD
hard bottom
tractors
试验
vibration frequency
experiments
paddy conditions
功率谱密度
振动频率
agriculture machinery
硬底层
拖拉机
农业机械
水田工况
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2016.11.005

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Summary:为研究拖拉机在水田工况下的振动特性。该文采用轮胎滚动法测取南京江浦农场水田硬底层纵断面空间函数,对数据进行自相关性检验,分析硬底层垂直位移功率谱密度;以CF700型拖拉机（常发集团）为研究对象,基于轮胎-湿软水田土壤系统,建立水田工况下拖拉机三自由度振动微分方程和仿真模型,以水田硬底层纵断面时间函数为输入矢量,对拖拉机振动特性进行仿真研究,并将仿真结果与试验结果进行对比分析。结果表明,水田硬底层高程具有统计相关性,其不平度系数Gx（0.1）=316.7×10^-6 m^3,拟合指数w=-1.651;试验所得拖拉机前桥、后桥及座椅椅面垂向振动频率分别是2.91、3.6及2.5 Hz,与仿真结果相对误差分别为19.9%、7.2%、16.0%。以上结果为面向水田作业的拖拉机振动研究提供路面参考模型,验证了水田工况下拖拉机三自由度平面振动模型的有效性,为拖拉机减振系统的参数设计提供理论依据。
Bibliography:11-2047/S
When a tractor works in a paddy field, road roughness is the main factor affecting its running, however, there has been no research on road roughness of paddy field. For the study of vibration characteristics of tractor in the condition of paddy field operation, the experiment was conducted in June 2014. Nanking Jiangpu Farm Agronomy Experiment Center which has clayey paddy soil was chosen as the experiment site, and tire rolling was adopted as the experiment method. By a self-designed measuring device, the vertical section function of hard bottom of paddy field was measured and obtained. Then the obtained data was conducted with auto-correlation test, and the power spectral density（PSD） of paddy field was analyzed with hard bottom of vertical displacement. The CF700 tractor was the research object. In addition to the stiffness and damping of the tire, soft and wet paddy soil was another factor affecting the vibration characteristics of the tractor. Based on the tire-soil system, in accordance with t
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2016.11.005