Eddy Current-Based Vibration Suppression for Finish Machining of Assembly Interfaces of Large Aircraft Vertical Tail
Eddy Current-Based Vibration Suppression for Finish Machining of Assembly Interfaces of Large Aircraft Vertical Tail
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DOI：
10.1115/1.4043733
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
Wei Fan;Lianyu Zheng;W. Ji;Xiong Zhao;Lihui Wang;Yiqing Yang
中科院分区：
文献类型：
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作者：
Wei Fan;Lianyu Zheng;W. Ji;Xiong Zhao;Lihui Wang;Yiqing Yang
飞机垂尾装配界面为大型薄壁结构，由钛合金材料制成，由于其刚度低、导热系数低、化学活性高，在精加工时易产生加工振动、变形和根切。为了解决这些问题，提出了一种新型装配界面加工涡流阻尼器（ECD-AIM），以抑制装配界面加工中的多模态振动。基于电磁感应原理，建立了阻尼器阻尼性能的数学模型，提出了一种新型的阻尼器设计方案，并考虑阻尼性能与阻尼器关键部件之间的关系进行了优化设计。建立了装配界面加工抑制系统的动力学模型，通过数值分析和有限元仿真，得到了振动速度与阻尼器阻尼性能的关系。最后，通过一系列动态试验（冲击试验和谐波试验）和切削试验，验证了该阻尼器在无ECD-AIM、单ECD-AIM和双ECD-AIM三种配置下的阻尼性能。试验结果表明，双ECD-AIM结构能够保证装配界面加工的稳定性和可靠性。所提出的阻尼器可以提供一个可行的解决方案，振动抑制在有限的工作空间。
Assembly interface of aircraft vertical tail is a large thin-wall structure and made from titanium alloys, which causes easily machining vibration, deformation and undercutting in finish machining due to its low stiffness, low thermal conductivity, and high chemical activity. To address these problems, a novel eddy current damper for assembly interfaces machining (ECD-AIM) is proposed to suppress multimodal vibration in the machining of the assembly interfaces. Within the context, the mathematical model of damping performance of the damper is established based on the principle of electromagnetic induction, based on which a novel design of the damper is proposed, and optimized by considering the relationship between damping performance and the key components of the damper. Then, the dynamics model of the suppression system of the assembly interface machining is established, where the relationship between vibration velocity and damping performance of the damper is obtained by using numerical analysis and finite element simulation. Finally, the damping performance of the damper is validated in terms of the three configurations (no applied ECD-AIM, a single ECD-AIM, and dual ECD-AIMs) via a set of dynamic tests (impact tests and harmonic tests) and cutting tests. The test results demonstrate that the configuration of dual ECD-AIMs can guarantee stability and reliability of assembly interface machining. The proposed damper can provide a feasible solution for vibration suppression in a limited workspace.