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基于農田不平度的拖拉機機組輸入譜推導與振動仿真
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Deduction of Input Spectrum of Tractor-implement Combination and Vibration Simulation Base on Farm Surface Roughness
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    摘要:

    推導了拖拉機為兩軸四輪、播種機為單軸兩輪的六輪輸入譜矩陣，可用于研究牽引式播種作業(yè)機組受農田不平度激勵所產生振動的頻域特性。用Roberson-Wittenburg(R-W)方法建立了牽引機組的22自由度動力學模型，然后根據(jù)R-W法建立了機組的動力學普遍方程，在對方程進行運動學和動力學分析的基礎上，采用多步Geal-預估-校正法進行了時域求解，采用等效的統(tǒng)計線性化方法進行頻域求解，對比分析表明動力學模型正確。

    Abstract:

    The spectrum matrix of six-tire input, comprised of the two-axle and four-wheel of the tractor and the one-axle and two wheel of the seeder, were deduced. The obtained matrix can be applied to research the vibrating frequency domain characteristics of the seeder which is caused by the farm surface roughness. And by applying the R-W method, a dynamics model with 22 freedoms of the seeder was set up. Then the motion and dynamics was analyzed based on the derived dynamics equation. Furthermore, with the method of multiple-step Geal estimation and correction, the time domain was solved, and with the method of equivalent method of statistical linearization, the frequency domain was solved. Comparative analysis shows that the dynamics model is right. 

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楊自棟,耿端陽,彭麗芳,王相友.基于農田不平度的拖拉機機組輸入譜推導與振動仿真[J].農業(yè)機械學報,2009,40(12):62-66.Deduction of Input Spectrum of Tractor-implement Combination and Vibration Simulation Base on Farm Surface Roughness[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(12):62-66.

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