简谐激励下双调谐质量阻尼器基本特性研究

发布时间：2018-03-23 20:55

本文选题：双调谐质量阻尼器(DTMD)　切入点：优化设计　出处：《振动与冲击》2015年17期

【摘要】：借鉴TMD和MTMD各自的优缺点,结合土木工程结构减震装置的经济性和适用性,提出一种双调谐质量阻尼器(DTMD),建立了简谐激励作用下单自由度DTMD控制体系(DTMD-SDOF)的运动方程,推导其动力反应放大系数,提出了针对DTMD的调优策略及优化评价函数,并通过相关算法获得DTMD-SDOF系统的参数优化程序,并利用该程序得到了DTMD的最优参数;具体分析了不同参数对DTMD共振峰值和调频宽度的影响,并对阻尼器阻尼参数或受控结构频率发生变化后DTMD的鲁棒性进行了评价;对DTMD与TMD、MTMD的有效性和鲁棒性进行了对比分析。理论与数值研究结果表明,DTMD的控制效果明显优于TMD和MTMD,并且对主结构频率的摄动拥有更佳的鲁棒性。事实证明,DTMD比TMD和MTMD更具工程适用性。
[Abstract]:Using the advantages and disadvantages of TMD and MTMD for reference, combined with the economy and applicability of civil engineering structure shock absorber, a kind of double tuned mass dampers (DTMD-SDOF) is proposed, and the motion equation of DTMD control system with order degree of freedom issued by harmonic excitation is established. The dynamic response magnification factor is derived, the optimization strategy and optimization evaluation function for DTMD are proposed, and the parameter optimization program of DTMD-SDOF system is obtained by correlation algorithm, and the optimal parameters of DTMD are obtained by using this program. The effects of different parameters on DTMD resonance peak and frequency modulation width are analyzed, and the robustness of DTMD is evaluated after the damper damping parameter or the frequency of the controlled structure changes. The effectiveness and robustness of DTMD and TMD are compared and analyzed. The theoretical and numerical results show that the control effect of DTMD is obviously better than that of TMD and MTMD, and it has better robustness to the frequency perturbation of the main structure. TMD and MTMD have more engineering applicability.
【作者单位】：北京工业大学工程抗震与结构诊治北京市重点试验室;
【基金】：国家自然科学基金资助项目(51378039;91315301-03)
【分类号】：TU352.1

【参考文献】