新型形状记忆合金阻尼器及其减震性能的研究

发布时间：2018-03-31 17:25

本文选题：形状记忆合金　切入点：本构模型　出处：《北京交通大学》2017年硕士论文

【摘要】：新型形状记忆合金阻尼器是一种新型的被动控制系统,独有的自复位特性使其在结构减震方面具有广阔的应用前景。本文在新型形状记忆合金阻尼器理论研究的基础上,利用遗传算法和Benchmark减震结构模型,从实际工程应用的角度出发,对新型形状记忆合金阻尼器在不同地震波作用下的减震效果进行讨论分析,主要包括以下工作:1.根据形状记忆合金基本理论和新型形状记忆合金阻尼器的特性,选择Brinson本构模型作为本文研究的出发点。通过本文模拟的形状记忆合金的应力-应变关系和文献中给出的本构关系作对比,说明了本文选用Brinson本构模型的合理性和正确性。2.根据新型形状记忆合金阻尼器各组成构件的基本构造及其工作原理,在MATLAB中模拟了其力-位移关系。接着分析了新型形状记忆合金阻尼器各参数对其力-位移关系的影响,并确定了新型形状记忆合金阻尼器的合理参数。3.首先介绍了几种不同形式的阻尼器连接方式,选取人字形支撑作为新型形状记忆合金阻尼器的连接方式。接着以遗传算法为手段,利用位置优化目标函数对新型形状记忆合金阻尼器进行优化。4.将新型形状记忆合金阻尼器应用在Benchmark结构中,分别在多遇地震和罕遇地震作用下进行弹塑性时程分析,比较结构在有控装置和无控装置作用下的地震响应,并通过Benchmark评价指标对该控制策略进行综合评价。5.多遇地震作用下,结构的层间位移角、楼板加速度和基底剪力均得到了有效控制;罕遇地震作用下,结构的层间位移角指标、延性指标、耗能指标、塑性铰指标基本均小于1,表明本文控制策略起到了较好的减震效果。
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.1

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