摘要
研发了一种新型变阻尼式TMD,阐述了它的构造设计及工作原理,通过对其进行的力学性能试验,研究了与该减震装置组成成分相关的三个参数(质量、刚度和液体黏度)变化时对其力学性能的影响.试验结果表明:当该减震装置组成部分相应的刚度、质量和液体黏度增大时,该减震装置对结构施加的等效阻尼力也随之增大,而且其在大震时对结构的减振效果更好.接着利用遗传算法,对该减震装置的阻尼系数,频率比,限制位移(相对结构的最大许可位移)等参数进行了优化分析,并得出了它们的最优取值.最后,为了研究该变阻尼式TMD对结构的减震效果,利用Simulink工具对未安装和安装该变阻尼式TMD的弹性单自由度结构进行了仿真分析;仿真结果表明:该变阻尼式TMD能够很好的控制结构的加速度和位移响应,且随着地震动幅值的增大,它的减震效果也逐渐增大,这与力学性能试验的结果较好吻合.
In this paper,a new type of variable damp TMD is developed.Its structure design and working principle are described.Through mechanical properties test,the effects of three parameters(mass,stiffness and liquid viscosity)related to the components of the damping device on its mechanical properties are studied.Test results show that when the corresponding stiffness,mass and liquid viscosity of the components of the damping device increase,the equivalent damping force exerted by the damping device on the structure will also increase,and the effect of the damping device on the structure will be better in large earthquakes.Then,the parameters such as damping coefficient,frequency ratio and limited displacement(maximum allowable displacement relative to the structure)of the damping device are optimized and analyzed by genetic algorithm,and their optimal values are obtained.Finally,in order to study the effect of the variable damp TMD on the structure,Simulink tool is used to simulate and analyze the elastic single-degree-of-freedom structure which is not installed or installed with the variable damp TMD.Tesults show that the variable damp TMD can control the acceleration and displacement response of the structure well,and with the increase of the amplitude of the ground motion,its damping effect increases gradually,which is in good agreement with the results of the mechanical properties test.
作者
赵祥
高永苗
周铁钢
李万琴
丁怡洁
ZHAO Xiang;GAO Yongmiao;ZHOU Tiegang;LI Wanqin;DING Yijie(School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China;The Key Lab of Plateau Building and Eco-community in Qinghai,Xining 810008,China)
出处
《西安建筑科技大学学报（自然科学版）》
北大核心
2020年第6期797-805,839,共10页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金青年科学基金资助项目(51708446)
青海省高原绿色建筑与生态社区重点实验室开放基金计划资助项目(KLKF-2018-007)
陕西省重点研发计划项目重点产业创新链(群)(2020ZDLNY06-03)。
