为了更有效地探究浮放馆藏文物运动状态的影响因素，采用振动台试验和数值试验探究了单向水平激励下浮放文物运动状态的基本规律。选取了质心高宽比为3.7的陶瓷花瓶分别在单向的简谐波和地震波下进行了振动台试验。并根据实际尺寸建立了精细化的有限元模型并与试验结果进行对比，并利用验证后的有限元模型，对激励加速度、接触面的摩擦系数以及展台面的倾斜度进行了参数化分析，结果表明：试件的高宽比、形状，接触面的粗糙度和倾斜度以及激励的频率、幅值特性均是浮放系统运动状态的影响因素，其中运动状态对摩擦系数十分敏感。圆形底面的花瓶在单向激励下容易出现扭转现象，为保证浮放文物的安全，应尽量保持展台面水平。
Abstract
In order to explore the factors affecting the motion state of cultural relics in freestanding collection more effectively, shaking table test and numerical test were used to explore the basic law of the motion state of freestanding cultural relics under unidirectional horizontal excitation. The ceramic vase with a centroid aspect ratio of 3.7 was selected to carry out shaking table tests under unidirectional harmonic and seismic waves, respectively. According to the actual size, a fine finite element model is established and compared with the experimental results, and the excitation acceleration, the friction coefficient of the contact surface and the inclination of the booth surface are parameterized by using the verified finite element model. The results show that the aspect ratio and shape of the specimen, the roughness and inclination of the contact surface, and the frequency and amplitude characteristics of the excitation are all factors affecting the motion state of the freestanding system. The motion state is very sensitive to the friction coefficient. The vase with circular bottom is easy to twist under one-way excitation. in order to ensure the safety of freestanding cultural relics, the level of the exhibition surface should be kept as far as possible.
关键词
浮放文物 /
运动状态 /
动力响应 /
有限元分析
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Key words
freestanding relics /
motion state /
dynamic response /
finite element analysis
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