三维复合隔震支座的碟形弹簧试验与应用研究

发布时间：2018-02-26 17:23

本文关键词： 三维隔震支座碟形弹簧等效阻尼比有限元　出处：《北京交通大学》2013年硕士论文　论文类型：学位论文

【摘要】：本文主要对新型三维复合隔震(3DGZ)支座进行性能研究,进行了水平隔震装置设计方法的修正,提出了组合碟形弹簧件设计存在的问题；为了获得组合碟形弹簧件实际工作状态下的等效刚度和等效阻尼比,进行了组合碟形弹簧组的静态和动态加载试验研究,进行了试验结果分析研究；利用(?)ANSYS有限元模拟,对3DGZ支座偏心工作状态下的稳定性进行分析。具体研究工作和成果如下：修正了3DGZ支座水平隔震装置设计方法,并在ANSYS有限元软件中建立支座模型对支座水平隔震工作状态进行模拟。模拟结果显示,修正后设计方法能够较好的达到水平设计刚度。针对3DGZ支座碟形弹簧组选取存在的不足,采用试验的方法研究碟形弹簧静态和动态加载特性,研究结果表明： (1)对于单片碟簧刚度曲线,数值模拟曲线与大挠度薄板假设算法所得加载曲线相差不大,与《GB1972-2005(碟形弹簧)》规范计算方法所得曲线相比更接近于试验加载曲线。 (2)在动荷载作用下,碟形弹簧组在一定加载频率以上能够保持较好的耗能能力。随着预压量的增大,组合碟形弹簧件耗能能力增强。 (3)在较大预压量下,随着动载幅值的增大,组合碟形弹簧的的竖向等效刚度降低,等效阻尼比降低,但在较大预压量下仍能保持在20%以上,这说明组合碟形弹簧仍具有较高的阻尼。 (4)分析规范给出组合碟形弹簧承载力计算公式中的叠合面摩擦系数物理意义及取值,将该摩擦系数实测值用于ANSYS有限元数值模拟,对比数值计算结果与碟形弹簧实验数据,探索数值分析时叠合面摩擦系数的设置方法。 (5)在偏心压力作用下,3DGZ支座的稳定性较好,在水平滞回耗能、水平运动与竖向运动解耦方面均优于同类型支座。
[Abstract]:In this paper, the performance of the new 3D composite isolator 3DGZ support is studied, the design method of the horizontal isolation device is revised, and the problems in the design of the composite disc spring are put forward. In order to obtain the equivalent stiffness and damping ratio of the combined disc spring, the static and dynamic loading tests of the combined disc spring are carried out, and the experimental results are analyzed and studied. The stability of 3DGZ bearing under eccentric working condition is analyzed by ANSYS finite element simulation. The concrete research work and results are as follows:. The design method of horizontal isolation device for 3DGZ bearing is modified, and the support model is established in ANSYS software to simulate the working state of horizontal isolation. The simulation results show that the modified design method can achieve the horizontal design stiffness better. In view of the deficiency of selecting the disc spring group of 3DGZ support, the static and dynamic loading characteristics of the disc spring are studied by the experimental method. The results show that:. 1) for the stiffness curve of single disc spring, the numerical simulation curve is not different from the load curve obtained by the large deflection plate assumption algorithm, and is closer to the experimental loading curve than the curve obtained by < GB1972-2005 (disc spring) > specification calculation method. 2) under the action of dynamic load, the disc spring group can maintain a better energy dissipation capacity above a certain loading frequency, and with the increase of preloading amount, the energy dissipation capacity of the combined disc spring member increases. 3) with the increase of the amplitude of dynamic load, the vertical equivalent stiffness and the equivalent damping ratio of the combined disc spring decrease, but they can still be kept above 20% under large preloading. This shows that the combined disc spring still has a high damping. The physical meaning and value of the friction coefficient of the composite disc spring are given in the analytical code. The measured friction coefficient is used in the ANSYS finite element numerical simulation, and the numerical results are compared with the experimental data of the disc spring. To explore the setting method of friction coefficient of superimposed plane in numerical analysis. 5) the stability of the 3DGZ bearing under eccentric pressure is better than that of the same type of bearing in terms of horizontal hysteretic energy dissipation, horizontal and vertical motion decoupling.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU352.12

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