| 黄双， 武欣， 李培兴.耦合四连杆机构等效刚度计算[J].轻工机械,2022,40(4):6-10 |
| 耦合四连杆机构等效刚度计算 |
| Equivalent Stiffness Calculation of Coupled Four Bar Linkage |
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| DOI：10.3969/j.issn.1005 2895.2022.04.002 |
| 中文关键词: 纺织装备 耦合四连杆机构 等效刚度 能量法 |
| 英文关键词:textile equipment coupled four bar linkage equivalent stiffness energy method |
| 基金项目:国家自然科学基金资助项目(51905331)；上海工程技术大学青年科研团队培育计划（QNTD202112）。 |
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| 中文摘要: |
| 为正确求解簇绒地毯织机转子系统的振动特性（固有频率、振型和临界转速等），课题组采用能量法对针曲柄摇杆机构的等效线刚度和等效转动刚度进行研究。将各转子间耦合单元的曲柄摇杆机构视成多个刚架；对于每一个刚架，施加单位力和单位力矩，采用能量法对等效线刚度和转动刚度进行求解。结果表明：针曲柄摇杆机构的等效线刚度和转动刚度变化较大，随曲柄转动而周期变化的等效刚度不可看做常数，需考虑时变刚度对系统振动特性的影响。该研究为等效刚度的求解提供了一个新思路。 |
| 英文摘要: |
| In order to correctly solve the vibration characteristics of the rotor system of a tufted carpet loom (natural frequency, vibration mode and critical speed, etc.), the energy method was used to investigate the equivalent linear stiffness and equivalent rotational stiffness of the needle crank rocker mechanism. Treating the crank rocker mechanism of the coupling unit between rotors as multiple rigid frames, unit forces and unit moments were applied for each rigid frame, and the equivalent linear stiffness and rotational stiffness were solved using the energy method. The results show that the equivalent linear stiffness and rotational stiffness of the needle crank rocker mechanism change greatly, and the equivalent stiffness that changes periodically with the rotation of the crank cannot be regarded as a constant, and the influence of time varying stiffness on the vibration characteristics of the system should be considered. This study provides a new idea for the solution of equivalent stiffness. |
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