拉索式旋转电涡流阻尼器的理论模型及频域响应分析

Theoretical Model and Analysis of the Frequency Response of aRotational Eddy Current Damper with Cable Bracing

摘要:

惯容器是一种新型的振动控制装置，该装置可以将螺杆的轴向运动转换为黏滞材料和旋转质量的高速旋转运动，使阻尼器的阻尼效应和质量效应得到放大。基于惯容器原理以及电涡流原理，提出一种新型的拉索式旋转电涡流阻尼器，为结构被动控制提供了新的设计思路。为研究这种新型惯容系统的减振机理，对安装拉索式旋转电涡流阻尼器单层框架的力学模型进行了探讨。推导出了配置惯容系统单质点体系的动力表达式，并基于此表达式探讨在频域内该惯容系统关键参数对单质点体系位移、速度和加速度响应的影响。结果表明：这种拉索式旋转电涡流阻尼器可以起到放大质量的效果，惯容系统可以有效地减少单质点体系的位移、速度和加速度响应幅值。

Abstract:

An inerter is a novel mechanical element that translates linear motion to high-speed rotational motion. In this work, we propose a novel passive vibration control system based on the inerter and eddy current principle. First, to study the damping mechanism of this new system, a mechanical model of a single-degree-of-freedom system with an inerter is derived. Next, the influences of key parameters of the inerter system on the structural response in the frequency domain are discussed. The results show that the eddy current damper can amplify the quality and that the inerter system can effectively reduce the displacement, velocity, and acceleration response of the structure.