This study derives a nonlinear reduced-order model in order to evaluate the efficacy of an energy harvesting absorber at controlling base excitations, vortex-induced vibrations, and simultaneous base excitations and vortex-induced vibrations. Vibration absorbers are secondary systems that couple with a primary structure to dissipate the mechanical energy of vibrations. An energy harvesting absorber turns a portion of that dissipated energy into useful electrical energy which can be used to power small systems. The effects of various design parameters of the energy harvesting absorber on the behavior of the system is examined under different excitations. Next, an investigation of increasing the stiffness of the absorber is carried out with a goal of increasing the range in which meaningful energy can be harvested. Designs for the energy harvesting absorber are compared for their control of the system and their energy output when the system is subjected to concurrent base excitations and vortex-induced vibrations. Using an energy harvesting absorber tuned for vortex-induced vibrations provides the greatest reduction in amplitude and the most even power output over the range of wind speeds and base excitations.

这项研究得出了一个非线性降阶模型，以便评估能量收集吸收器在控制基本激励，涡激振动，同时基本激励和涡激振动方面的功效。减振器是与主结构耦合以消散振动机械能的辅助系统。能量收集吸收器将一部分耗散的能量转换为可用于为小型系统供电的有用电能。在不同的激励下，研究了能量收集吸收器的各种设计参数对系统性能的影响。接下来，进行了增加吸收体的刚度的研究，其目的是扩大可以收集有意义的能量的范围。比较了能量收集吸收器的设计，以了解它们对系统的控制以及当系统同时受到基本激励和涡流诱发的振动时的能量输出。在风速和基本激励范围内，使用针对涡流引起的振动进行调谐的能量收集吸收器可最大程度地降低振幅，并提供最均匀的功率输出。