摘要
提出了一种具有更广调频宽度的摇摆双调谐质量阻尼器(dual-tuned mass damper,RDTMD)。首先,建立了单自由度RDTMD减振系统在简谐激励作用下的动力方程,推导得出其位移动力放大系数表达式;然后,基于RDTMD的优化评价函数,编译参数优化程序,获得RDTMD的全局最优参数以及条件最优参数;接着,探讨了阻尼器各参数对系统动力放大系数和调频宽度的影响规律,并对影响其鲁棒性的关键参数做了分析;最后,与传统DTMD、MTMD、TMD的减振效果和鲁棒性做了对比分析。分析结果表明:采用RDTMD对结构进行控制可有效降低主结构的动力响应;RDTMD的调频宽度更广,提高了阻尼器对主结构高阶振型的控制能力;在对装置鲁棒性的影响更大的主结构固有频率方面,RDTMD的鲁棒性明显优于其他同类阻尼器,是一种理想的减振控制装置。
Here,a rocking dual-tuned mass damper(RDTMD)with wider frequency modulation width was proposed.Firstly,the dynamic equation of a single-DOF RDTMD vibration reduction system under simple harmonic excitation was established,and the expression of its displacement dynamic amplification coefficient was derived.Then,based on the optimization evaluation function of RDTMD,the parametric optimization program was compiled to obtain global optimal parameters and conditional optimal parameters of RDTMD.Effects of the damper’s parameters on the system’s dynamic amplification coefficient and frequency modulation width were explored,and key parameters affecting the system’s robustness were analyzed.Finally,contrastive analyses were performed for vibration reduction effect and robustness of RDTMD and those of DTMD,MTMD and TMD,respectively.The analyses results showed that using RDTMD to control a structure can effectively reduce its main structure’s dynamic response;the frequency modulation width of RDTMD is wider to improve the damper’s control ability to its main structure’s higher-order vibration modes;in terms of natural frequency of main structure having a larger impact on device’s robustness,the robustness of RDTMD is obviously better than that of other similar dampers,and it is an ideal vibration reduction control device.
作者
杜永峰
李炜枫
李虎
DU Yongfeng;LI Weifeng;LI Hu(Institute of Earthquake Protection and Disaster Mitigation,Lanzhou University of Technology,Lanzhou 730050,China;International Research Base of Seismic Mitigation and Isolation of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第9期275-283,共9页
Journal of Vibration and Shock
基金
国家自然科学基金(51778276)。
关键词
摇摆双调谐质量阻尼器(RDTMD)
参数优化
振动控制
减振性能
鲁棒性
rocking double-tuned mass damper(RDTMD)
parametric optimization
vibration control
vibration reduction performance
robustness
