固定和浮放条件下文物展柜动力响应分析与试验研究

发布时间：2018-05-11 01:37

本文选题：文物展柜 + 边界条件　；参考：《文物保护与考古科学》2017年03期

【摘要】：目前对文物保护的研究主要以试验为主,本研究试图用数值方法分析文物展柜的动力学特性,以解决试验分析方法所导致的缺陷。为此,对固定和浮放两种不同边界条件的文物展柜进行地震作用和简谐激励下的动力响应分析,给出了展柜展台面处的加速度动力放大系数(简称放大系数)上限值。以某博物馆展柜为原型,按1∶1/0.39进行缩尺振动试验,得出两种边界条件下展柜展台面处的放大系数。对试验展柜建立有限元模型,通过与试验对比,验证模型及分析方法的正确性。然后,建立展柜模型的有限元模型,对5种尺寸的展柜进行了动力响应分析,并考虑激励幅值、激励频率等对放大系数的影响。分析结果有助于指导文物的防震保护工作。
[Abstract]:At present, the research of cultural relic protection mainly focuses on experiment. This study attempts to use numerical method to analyze the dynamic characteristics of cultural relic display cabinets in order to solve the defects caused by the experimental analysis method. Therefore, the dynamic response of cultural relic display cabinets with fixed and floating boundary conditions under seismic and harmonic excitation is analyzed, and the upper limit value of acceleration dynamic magnification factor (abbreviated as magnification factor) at the display surface is given. Taking a museum cabinet as a prototype, a scale vibration test is carried out according to 1: 1 / 0.39, and the magnification factor at the surface of the display table is obtained under two boundary conditions. The finite element model of the test cabinet is established, and the correctness of the model and analysis method is verified by comparison with the test. Then, the finite element model of the display cabinet model is established, and the dynamic response of five kinds of display cabinets is analyzed, and the effects of excitation amplitude and excitation frequency on the magnification factor are considered. The results are helpful to guide the protection of antiquakes.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金(11372018)资助
【分类号】：G267;TU311.3

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