【摘要】 运用ANSYS软件对向日葵联合收获机气力输送结构的冲量传感器进行了流固耦合模态分析，研究了有无流固耦合、冲击板材料和冲击板固支方式对冲量传感器固有频率和振型的影响，分析了冲量传感器固有频率对收获机测产精度的影响。结果表明：冲量传感器固有频率越大，系统稳定性和灵敏性越好；流固耦合作用明显提高了冲量传感器的1阶固有频率，但并不改变固有振型；冲击板材料影响冲量传感器1阶固有频率，且冲击板材料特性相近时对振型影响较小，其中亚克力材料冲击板的冲量传感器1阶固有频率最大为46.913Hz;冲击板固支方式影响冲量传感器固有频率和振型，其中中间固支方式的1阶固有频率最大为35.548 Hz。通过向日葵测产试验台验证试验，得出亚克力冲击板的冲量传感器测量最大相对误差最小为2.1%,中间固支方式的冲量传感器测量最大相对误差最小为2.37%。由此验证了仿真分析的合理性。更多还原

【Abstract】 Using the ANSYS software to sunflower combine impulse sensor on the structure of the pneumatic conveying the fluid-structure coupling modal analysis, studied the presence of fluid-structure interaction, impact plate materials and impact plate clamped on the natural frequencies and formations, the influence of the pulse sensor and analyses the influence of natural frequency pulse sensor harvester output accuracy of measurement. Experimental results show that: The greater the natural frequency of the impulse sensor, the better the stability and sensitivity of the system; The fluid-structure coupling effect obviously increases the first natural frequency of the impulse sensor, but does not change the natural array. The impact plate material affects the first-order natural frequency of the impulse sensor, and the impact plate material has little effect on the formation when the material characteristics of the impact plate are similar. The maximum first-order natural frequency of the impact sensor of the acrylic material impact plate is 46.913 Hz. The fixed mode of the impact plate affects the natural frequency and formation of the impulse sensor, among which the first natural frequency of the intermediate fixed mode is 35.548 Hz at most. Through the verification test of sunflower production test bed, the maximum relative error of the impulse sensor of acrylic impact plate is at least 2.1%, and the maximum relative error of the impulse sensor of intermediate fixed support is at least 2.37%.The rationality of simulation analysis is verified.更多还原