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  本文選題：SMA智能隔震支座　切入點：隔震　出處：《遼寧工程技術(shù)大學》2015年碩士論文　論文類型：學位論文

【摘要】：隨著人類的發(fā)展,社會的進步,人們對生活質(zhì)量的要求越來越高,城市建設(shè)的腳步越來越快,建筑是點綴美化城市的,是一個城市發(fā)展水平的重要標志。城市的高層或者超高層建筑越來越多,同時自然災害(風載荷和地震)對建筑的破壞是客觀存在的,為了減小甚至是遏制自然災害帶來的損失,建筑結(jié)構(gòu)的隔震技術(shù)就顯得尤為重要了。半主動結(jié)構(gòu)控制是主動控制與被動控制相結(jié)合的產(chǎn)物,本文是在前人研制的疊層橡膠支座的基礎(chǔ)上用形狀記憶合金(SMA)有效的、合理的布置在橡膠支座的四周,并在隔震結(jié)構(gòu)中加入溫感控制器來充分發(fā)揮SMA絞線的形狀記憶效應(yīng)的特性,三者有效的結(jié)合在一起研制出SMA智能隔震支座。分析并研究了SMA智能隔震支座的工作過程以及工作原理,用結(jié)構(gòu)動力學分析法寫出了運動方程,利用有限元分析軟件對基于隔震支座對的三層框架結(jié)構(gòu)進行模擬分析研究隔震支座的力學性能,并對位移、加速度進行時程分析,此外還對半主動控制存在的時滯效應(yīng)問題提出了兩種補償策略且模擬分析了補償策略的效果。得到了以下結(jié)論：(1)溫控傳感器使SMA絞線充分發(fā)揮出了形狀記憶效應(yīng)的特性,有效的改變隔震系統(tǒng)的阻尼和增大回復力,進而使上部建筑物結(jié)構(gòu)的位移、加速度響應(yīng)變小,最終使隔震系統(tǒng)有了良好的隔震效果,并且使整個結(jié)構(gòu)的穩(wěn)定性有所提升,此外還使隔震結(jié)構(gòu)具有了智能性、自適應(yīng)性。(2)通過模擬分析,三種支座(普通疊層橡膠支座、SMA——疊層橡膠復合支座、SMA智能隔震支座)相比之下,SMA智能隔震支座的隔震效果最佳。(3)半主動控制系統(tǒng)的時滯效應(yīng)是客觀存在的,為了最大程度上減小其影響,提出了移相法和狀態(tài)補償法。移相法和狀態(tài)補償法在一定程度上與實時結(jié)構(gòu)控制效果差不多,都具有一定的實用性和可執(zhí)行性。以上對SMA智能隔震支座的研究與分析,這對以后的結(jié)構(gòu)振動控制的隔震設(shè)計以及工程實際應(yīng)用提供微薄的理論基礎(chǔ)。
[Abstract]:With the development of human beings and the progress of society, people have higher and higher demands on the quality of life, and the pace of urban construction is getting faster and faster. Buildings are embellished and beautified the city. It is an important symbol of a city's development level. There are more and more high-rise or super-tall buildings in the city. At the same time, the damage caused by natural disasters (wind loads and earthquakes) to buildings is objective. In order to reduce or even contain the damage caused by natural disasters, the isolation technology of building structures is particularly important. Semi-active structure control is the product of combining active control with passive control. In this paper, based on the laminated rubber bearings developed by the predecessors, the shape memory alloy (SMA) is used to effectively and reasonably arrange the rubber bearings around them. A temperature sensing controller is added to the isolated structure to give full play to the shape memory effect of SMA strands. The working process and working principle of SMA intelligent isolation bearing are analyzed and studied, and the motion equation is written out by structural dynamics analysis. The finite element analysis software is used to simulate the three-story frame structure based on the isolation support. The mechanical performance of the isolation support is studied, and the displacement and acceleration are analyzed in time history. In addition, two compensation strategies are proposed for the delay effect of semi-active control, and the effect of the compensation strategy is simulated and analyzed. The following conclusion is drawn: 1) the temperature control sensor makes the SMA strand give full play to the shape memory effect. The damping of the isolation system is changed effectively and the recovery force is increased, and then the displacement and acceleration response of the upper building structure is reduced, finally the isolation system has a good isolation effect, and the stability of the whole structure is improved. In addition, the isolation structure is intelligent and adaptive. The delay effect of semi-active control system of three kinds of bearings (common laminated rubber bearing SMA-laminated rubber composite bearing and SMA intelligent isolation support) is objective, compared with the best isolation effect of SMA intelligent isolation support. In order to minimize its influence, the phase shift method and the state compensation method are proposed. The phase shift method and the state compensation method have the same effect as the real time structure control method to some extent. The research and analysis of SMA intelligent isolation support provide a theoretical basis for the isolation design of structural vibration control in the future and the practical application of engineering.
【學位授予單位】：遼寧工程技術(shù)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU352.12

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