气吸式免耕播种机的振动测试与振动理论分析
Analysis of vibration test and vibration theory of air-suction no-tillage planter

为研究气吸式免耕播种机的振动特性，对2BM-5型气吸式免耕播种机进行振动测试与振动理论分析。根据振动测试结果，以免耕播种机的前进速度与振动信号正弦基波为基本参数构建简谐激励，建立气吸式免耕播种机的振动幅频特性与振动固有频率的频率响应数学模型，并进行气吸式免耕播种机振动幅频特性信号的验证。结果表明：气吸式免耕播种机垂直振动的主要影响因素有播种机结构、质量、作业前进速度、入土装置与不同类型土壤作用的阻尼情况和地表不平度；其垂直振动存在2个固有频率的振型。
In order to explore the characteristics of vibration of the air suction no-tillage planter,analysis of vibration testing and vibration theory of 2BM-5 air suction planter was conducted.According to the vibration test results,fundamental harmonic excitation was constructed to forward speed of the no tillage planter and the sine wave of vibration signal as basic parameters,to establish the mathematical model of the frequency response for vibration amplitude frequency characteristic of the air suction planter and natural frequency of vibration,to verify the signal of amplitude frequency characteristic of vibration of the air suction seeder.The results show that:The main factors that affect vertical vibration have the structure of the seeding machine,quality,forward speed of operation,damping condition of the embedded device and different types of soil,ground surface roughness.Andthere are two natural frequencies of vertical vibration modes.