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新疆大学机械工程学院
Published:2016
移动端阅览
[1]刘子龙,王春耀,魏庭鹏,等.果树冲击振动动态特性的研究[J].新疆大学学报(自然科学版),2016,33(04):495-499.
[1]刘子龙,王春耀,魏庭鹏,等.果树冲击振动动态特性的研究[J].新疆大学学报(自然科学版),2016,33(04):495-499. DOI: 10.13568/j.cnki.651094.2016.04.023.
DOI:10.13568/j.cnki.651094.2016.04.023.
【目的】研究果树冲击时枝条阻尼比与直径的关系
树干、树枝的加速度动态响应
获得果树共振频率
确定较合适的采摘激振频率
为林果振动采摘收获机的参数优化提供必要的理论基础.【方法】将树干、树枝视为弹性、阻尼系统
建立果树简谐振动微分方程
并在室内进行振动台架试验
获得动态响应信号
通过对数衰减法计算得到不同测点处的树干或树枝的阻尼比以及对应的动态响应.【结论】由各测点加速度响应曲线可知
25 Hz左右为最优激振频率
树枝或树干的阻尼比随着直径的减小而增大
且近似成线性关系.
【Objective】 This paper study the relation of damping ratio with the diameter of the trunk
branches acceleration dynamic response of fruit trees to obtain the resonance frequency
to determine which pick excitation frequency
to provide the necessary theoretical basis for the optimization parameters fruit picking vibration harvester.【Method】 The trunk
branches were regarded as elasticity
damping system
establishment of an inter-harmonic vibration differential equation and indoor vibration test bed
the dynamic response of the signal obtained by the logarithmic decrement method calculated at different points of the trunk or branches of damping ratio.【Conclusion】 Acceleration response curve of each measuring point shows that the optimal excitation frequency is in around 25 Hz
branch or trunk damping ratio increases with decreasing diameter and approximately linear relationship.
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