【作者】 李志臣；

【导师】 朱思洪；

【作者基本信息】 南京农业大学 ， 农业机械化工程， 2004， 硕士

【摘要】 本文通过运用试验研究和理论分析的方法，对日本拖拉机和中国拖拉机在人工路障条件下的振动性能进行了对比研究。日本拖拉机以THS22为试验样车，中国拖拉机以神牛25为试验样车。以中低速为试验时拖拉机的试验行驶速度。试验时加速度传感器放置在座位的下方，测试了不同速度下的振动加速度，运用时域和频域分析的方法分析了拖拉机的振动性能；同时运用1/3倍频程分析对比法和总加权加速度有效值法评价了拖拉机的乘坐舒适性。对神牛25还分析了发动机振动对拖拉机振动的影响。通过分析发现，THS22型拖拉机在人工路障条件下呈线性振动，振动幅值与拖拉机行驶的速度呈线性关系，并且在以人体敏感频率振动的成分很大，所以在恶劣路况下的乘坐舒适性比较差。这也说明日本的拖拉机并不适合中国的乡间道路。神牛25型拖拉机的发动机振动对拖拉机在垂直方向的振动影响较大。并且在人体不敏感频率的高频区的振动的很大。由于受发动机振动的影响，神牛25型拖拉机在垂直方向和水平方向的振动相差不大，相对而言前后方向的振动较小。更多还原

【Abstract】 The vibration characteristics of Chinese and Japanese Tractor on artificial road are researched by theory analysis and experiment test. THS22 tractor as Japanese tractor and Shenniu25 as Chinese tractor are selected as experimental tractor. The middle and low speed are selected as experimental tractor speed. The accelerometer is set under the seat. The tractor vibration characteristics are analyzed with time and frequency series. The 1/3 octave bands and total weighted average are exploited to estimate the ride comfort of the tractor. As Shenniu25 tractor The influence of the engine vibration is analyzed. The linearity between the acceleration range and speed is described with THS22 tractor and the frequency of the dominating vibration is sensitive with human, so the ride comfort is not good and the Japanese tractor is unfit on Chinese country road. As Shenniu25 tractor, The influence of the engine vibration is very high and the dominating vibration is not sensitive with human, the vibration of X and Z orientation is almost the same and very high, in the contrast the vibration of Y orientation is very low.更多还原