Nonlinear Energy Transfer of a Spar-Floater System Using the Inerter Pendulum Vibration Absorber
Nonlinear Energy Transfer of a Spar-Floater System Using the Inerter Pendulum Vibration Absorber
复制标题
使用惯性摆减振器的柱梁-浮子系统的非线性能量传递
DOI：
10.1115/1.4063199
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Tai, Wei-Che
中科院分区：
文献类型：
--
作者：
Gupta, Aakash;Kiet Duong, Van Tuan;Tai, Wei-Che
利用滚珠丝杠机构将惯性摆减振器（IPVA）集成在浮筒和环形浮体之间，研究其波能转换潜力。流体动力刚度，附加质量，和辐射阻尼的影响的Spar浮体系统的特点是使用边界元法。结果表明，1：2通过倍周期分岔的内共振是造成杆-浮体系统与摆吸振器之间非线性能量传递的主要原因。这种非线性能量传递发生在系统的主谐波解由于1：2内共振现象而变得不稳定时。本文的重点是分析这种在系统第一固有频率附近的1：2内共振现象。IPVA系统集成时，与Spar浮子系统显示优于一个线性耦合的Spar和浮子的响应振幅运营商（RAO）的Spar和一个措施的能量转换潜力的系统。最后，对IPVA系统与单自由度系统（无任何水动力效应）进行了实验，观察了1：2内共振现象以及主质量与摆吸振器之间的非线性能量传递。实验结果表明，IPVA系统优于线性基准的振动抑制由于能量转移现象。
The inerter pendulum vibration absorber (IPVA) is integrated between a spar and an annulus floater using a ball-screw mechanism to study its wave energy conversion potential. Hydrodynamic stiffness, added mass, and radiation damping effects on the spar-floater system are characterized using the boundary element method. It is found that a 1: 2 internal resonance via a period-doubling bifurcation in the system is responsible for nonlinear energy transfer between the spar-floater system and the pendulum vibration absorber. This nonlinear energy transfer occurs when the primary harmonic solution of the system becomes unstable due to the 1: 2 internal resonance phenomenon. The focus of this paper is to analyze this 1: 2 internal resonance phenomenon near the first natural frequency of the system. The IPVA system when integrated with the spar-floater system is shown to outperform a linear coupling between the spar and the floater both in terms of the response amplitude operator (RAO) of the spar and one measure of the energy conversion potential of the system. Finally, experiments are performed on the IPVA system integrated with single-degree-of-freedom system (without any hydrodynamic effects) to observe the 1: 2 internal resonance phenomenon and the nonlinear energy transfer between the primary mass and the pendulum vibration absorber. It is shown experimentally that the IPVA system outperforms a linear benchmark in terms of vibration suppression due to the energy transfer phenomenon.