敦煌莫高窟壁画结构振动响应预测方法*
- 摘 要
-
(总参工程兵科研三所， 洛阳 471023)
［摘要］壁画是敦煌莫高窟中最珍贵的文物，为避免游客参观、景区施工、附近交通等引起的疲劳振动威胁到壁画的安全，需要对其振动响应进行合理的预测。通过数值仿真的方法确定文物最大响应位置及其与测点位置响应之间的关系，构建测试点与预测点之间的传递函数，并利用现场布置的有限测点所获得的振动信号来预测壁画结构的最大振动响应。以第16窟为例，通过验证表明该方法具有较好的准确性，可用于壁画文物的保护工作与振动风险评估。［关键词］敦煌莫高窟; 振动响应; 预测; 传递函数; 数值仿真中图分类号：TB123.1， X893.1 文献标识码：A 文章编号：1002-848X(2015)19-0062-05
Prediction method for vibration responses of wallpaintings of Mogao Grottoes at DunhuangDu Jianguo, Li Lisha, He Yongsheng, Guo Shixu(The Third Engineer Scientific Research Institute of the Headquarters of the General Staff, Luoyang 471023, China)Abstract: The wall-painting is the rarest cultural relics in Mogao Grottoes at Dunhuang. To avoid suffer from the influence of external fatigue vibration environment of tours, constructions, traffics et al., it is necessary to predict vibration responses of wall-paintings rationally. The relationship between the maximum response position of cultural relics and the position responses of measure points was determined by the method of numerical simulation. Transfer functions were proposed between measure points and prediction points. Based on the vibration signals obtained from the finite field measure points, the maximum vibration response of wall-painting structures was predicted. The accuracy of the method proposed was validated by an example of the 16th grotto. The method is beneficial to protect cultural relics and evaluate the risk of vibration.Keywords: Mogao Grottoes at Dunhuang; vibration response; prediction; transfer function; numerical simulation
*国家科技支撑计划项目（2013BAK01B01）。作者简介：杜建国, 博士, 副研究员, Email: dujianguo2010@sina.com。
