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常规滤嘴卷烟力学特征参数的测定

Determination of mechanical characteristic parameters of conventional filter cigarettes

  • 摘要: 为解决卷烟在输送过程中受作用力影响而造成卷烟损伤等问题,运用材料力学和Hertz接触理论,通过材料压缩实验对卷烟烟支段和滤嘴段的各向弹性模量进行计算,采用堆积角实验和倾斜角实验对卷烟摩擦系数进行标定,并分别采用有限元法和离散元法对卷烟力学模型进行仿真验证。结果表明:①常规滤嘴卷烟烟支段和滤嘴段的轴向弹性模量分别为4.16和16.10 MPa;滤嘴段的径向弹性模量为0.51 MPa,烟支段前、中、后部的径向弹性模量分别为0.23、0.20和0.23 MPa;卷烟间的静摩擦系数为0.30,滚动摩擦系数为0.015。②径向压缩实验与有限元仿真实验结果相对偏差≤6.80%,表明所建模型基本符合实际情况,测得的卷烟力学特征参数具有合理性。该方法可为提高包装机组烟库设计水平提供支持。

     

    Abstract: In order to avoid cigarette damage caused by applied force during conveying, the cigarette's elastic modulus in different directions was calculated by applying material mechanics theory and Hertz contact theory through material compression tests. The friction coefficient between cigarettes was determined by repose angle and inclination angle tests, and the mechanical model of cigarette was verified through simulation with finite element method and discrete element method separately. The results showed that: 1) The axial elastic modulus of tobacco section and filter of a conventional cigarette were 4.16 and 16.10 MPa respectively; the radial elastic modulus of filter was 0.51 MPa and that was 0.23, 0.20 and 0.23 MPa at front, middle and rear portions of tobacco section respectively; and the static friction coefficient between cigarettes was 0.30, and the rolling frication coefficient was 0.015. 2) The relative deviation between the radial compression test results and the finite element simulation test results was no more than 6.80%, which indicated that the established model basically conformed to the actual situation, and the measured mechanical characteristic parameters of cigarettes were reasonable. This method provides a support for improving the design of cigarette hopper in cigarette packer.

     

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