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The compliant centrifugal pendulum as the vibration absorber with second-order elasto-kinematic approximation
Journal of Vibration and Control ( IF 2.8 ) Pub Date : 2020-07-03 , DOI: 10.1177/1077546320941712
Pier Paolo Valentini 1 , Marco Cirelli 1 , Simone Di Donato 1
Affiliation  

Centrifugal dampers are used to reduce the vibrations and irregularities of motion of rotating parts subjected to torque perturbations. Compliant mechanisms can be used for building compact and simple embodiments of such devices. On the other hand, the elasto-kinematic behaviour of compliant structures requires a more accurate design with respect to standard solutions. The study discusses a methodology for designing compliant centrifugal dampers based on the arrangement of a collection of leaf flexure hinges connecting peripheral masses. The design is based on the equations of motion written under the approximation of an equivalent pseudo-rigid assembly. To preserve accuracy, the pseudo-rigid surrogate model is deduced taking into account second-order kinematic invariants and Euler–Savary equations, thus providing second-order approximation of the relative motion. This strategy combines accuracy and simplicity. The design can benefit from design equations for choosing the dimensions of the flexible links and the weight of the peripheral masses. An example of application is also discussed and a comparison with a flexible multibody model is also presented to demonstrate the accuracy of the proposed methodology.



中文翻译:

柔顺离心摆作为减振器,具有二阶弹性运动学近似

离心阻尼器用于减少受到扭矩扰动的旋转部件的振动和运动不规则性。顺应性机构可用于构建此类设备的紧凑且简单的实施例。另一方面,柔顺结构的弹性运动特性要求相对于标准解决方案更精确的设计。该研究讨论了一种基于连接外围质量的叶片挠性铰链的布置设计顺应性离心阻尼器的方法。该设计基于在等效伪刚性装配近似下编写的运动方程。为了保持准确性,推导了伪刚性替代模型,其中考虑了二阶运动学不变量和Euler-Savary方程,因此提供了相对运动的二阶近似。这种策略结合了准确性和简单性。该设计可以受益于设计方程式,用于选择柔性链节的尺寸和周边质量的重量。还讨论了一个应用示例,并与一个灵活的多体模型进行了比较,以证明所提出方法的准确性。

更新日期:2020-07-03
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