本文選題：形狀記憶合金　切入點(diǎn)：本構(gòu)模型　出處：《北京交通大學(xué)》2017年碩士論文

【摘要】：新型形狀記憶合金阻尼器是一種新型的被動(dòng)控制系統(tǒng),獨(dú)有的自復(fù)位特性使其在結(jié)構(gòu)減震方面具有廣闊的應(yīng)用前景。本文在新型形狀記憶合金阻尼器理論研究的基礎(chǔ)上,利用遺傳算法和Benchmark減震結(jié)構(gòu)模型,從實(shí)際工程應(yīng)用的角度出發(fā),對(duì)新型形狀記憶合金阻尼器在不同地震波作用下的減震效果進(jìn)行討論分析,主要包括以下工作:1.根據(jù)形狀記憶合金基本理論和新型形狀記憶合金阻尼器的特性,選擇Brinson本構(gòu)模型作為本文研究的出發(fā)點(diǎn)。通過本文模擬的形狀記憶合金的應(yīng)力-應(yīng)變關(guān)系和文獻(xiàn)中給出的本構(gòu)關(guān)系作對(duì)比,說明了本文選用Brinson本構(gòu)模型的合理性和正確性。2.根據(jù)新型形狀記憶合金阻尼器各組成構(gòu)件的基本構(gòu)造及其工作原理,在MATLAB中模擬了其力-位移關(guān)系。接著分析了新型形狀記憶合金阻尼器各參數(shù)對(duì)其力-位移關(guān)系的影響,并確定了新型形狀記憶合金阻尼器的合理參數(shù)。3.首先介紹了幾種不同形式的阻尼器連接方式,選取人字形支撐作為新型形狀記憶合金阻尼器的連接方式。接著以遺傳算法為手段,利用位置優(yōu)化目標(biāo)函數(shù)對(duì)新型形狀記憶合金阻尼器進(jìn)行優(yōu)化。4.將新型形狀記憶合金阻尼器應(yīng)用在Benchmark結(jié)構(gòu)中,分別在多遇地震和罕遇地震作用下進(jìn)行彈塑性時(shí)程分析,比較結(jié)構(gòu)在有控裝置和無控裝置作用下的地震響應(yīng),并通過Benchmark評(píng)價(jià)指標(biāo)對(duì)該控制策略進(jìn)行綜合評(píng)價(jià)。5.多遇地震作用下,結(jié)構(gòu)的層間位移角、樓板加速度和基底剪力均得到了有效控制;罕遇地震作用下,結(jié)構(gòu)的層間位移角指標(biāo)、延性指標(biāo)、耗能指標(biāo)、塑性鉸指標(biāo)基本均小于1,表明本文控制策略起到了較好的減震效果。
[Abstract]:A new type of shape memory alloy damper is a new passive control system, which has a wide application prospect in the field of structural shock absorption due to its unique self-reset characteristics. In this paper, based on the theoretical research of the new type shape memory alloy damper, a new type of shape memory alloy damper is proposed. Based on genetic algorithm and Benchmark structural model, the effects of new shape memory alloy damper under different seismic waves are discussed and analyzed from the point of view of practical engineering application. According to the basic theory of shape memory alloy and the characteristics of new shape memory alloy damper, The Brinson constitutive model is chosen as the starting point of this paper. The stress-strain relationship of the shape memory alloy simulated in this paper is compared with the constitutive relation given in the literature. The rationality and correctness of the Brinson constitutive model are explained. 2. According to the basic structure and working principle of each component of the new shape memory alloy damper, The relationship between force and displacement is simulated in MATLAB, and the influence of the parameters of the new shape memory alloy damper on the relationship between force and displacement is analyzed. The reasonable parameters of the new shape memory alloy damper are determined. Firstly, several different types of dampers are introduced. The herringbone bracing is chosen as the connection mode of the new shape memory alloy damper, and then the genetic algorithm is used as the means. The position optimization objective function is used to optimize the new shape memory alloy damper. 4. The new shape memory alloy damper is applied to the Benchmark structure, and the elastoplastic time history analysis is carried out under the action of frequent earthquake and rare earthquake, respectively. The seismic response of the structure under the action of the controlled device and the non-controlled device is compared, and the comprehensive evaluation of the control strategy is carried out through the Benchmark evaluation index .5.The displacement angle between the layers of the structure under the frequent earthquake action is evaluated. The acceleration of floor and the shear force of base are effectively controlled. Under rare earthquake, the index of displacement angle, ductility index, energy consumption index, The plastic hinge index is less than 1, which indicates that the control strategy plays a better damping effect.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.1

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