磁流变调谐质量阻尼器在海上风机振动控制中的应用

针对近海风机在风、波浪和地震3种载荷作用下的振动控制问题，提出了基于磁流变弹性体(magnetorheological elastomer, MRE)调谐质量阻尼器(tuned mass damper, TMD)的海上风机半主动控制方法。首先，介绍了MRE的变刚度磁致力学特性及面向海上减振需求的MRE-TMD结构设计原理；其次，建立了海上风机-TMD动力学模型，计算了风、波浪及地震激励载荷；再次，应用半主动控制算法跟踪识别风机塔筒顶端响应的频率，实时调节MRE-TMD的刚度，进而对海上风机进行振动控制。通过分析导管架式近海风机在多种载荷作用下的动力响应可知，采用基于MRE-TMD的控制方法能够有效衰减导管架式海上风机在多种载荷作用下的振动响应。与被动TMD相比，MRE-TMD具有较好的减振效果，为海上风机振动控制提供了一种新的解决思路。

Application of magnetorheological TMD in vibration control of offshore wind turbine

In order to solve the vibration problems of offshore wind turbines (OWTs) under the excitation of wind, wave and earthquake, a semi-active control method based on magnetorheological elastomer (MRE) tuned mass damper (TMD) was proposed. Firstly, the variable stiffness filed-induced characteristics of MRE and the design principle of MRE-TMD were introduced. Then, a dynamic model of OWT-TMD was established, and the excitation loads of wind, wave and earthquake were calculated. Next, the semi-active control algorithm was applied to track and identify the frequency of responses at the tower top of OWT, and the stiffness of MRE-TMD was adjusted in real time and then the vibration of OWT was controlled. By analyzing the dynamic response of the jacket supported OWT under the multiple loads, the results show that the MRE-TMD can effectively attenuate the vibration of the OWT. Compared with passive TMD, MRE-TMD presents better vibration reduction effects, which provides a new solution control of OWT.