三维激光扫描技术在石质文物数值模拟中的应用
Application of three-dimensional laser scanning technology in historic stone's numerical simulation
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摘要: 为了精确模拟石质文物的稳定性,以云冈11号窟为研究对象,利用三维激光扫描仪快速精确获取石窟的表层点云数据,再利用ANASYS进行内部网络结构剖分,最后导入Flac3d对石窟整体进行数值模拟计算.结果表明:云冈11号窟岩体现阶段总体位移方向向下并向后倾斜,稳定性较好,随时间推移其应力集中逐渐向下部发展;对于底部风化凹槽部位若不采取防护措施,预测100 a以后,洞窟底部会由于应力集中而导致其失稳、破坏.基于此提出了相应的加固措施.Abstract: In order to accurately simulate the structural stability of the stone relics, with Yungang 11th Grotto as object, it used three-dimensional laser scanner quickly to accurately obtain caves surface array data, and ANASYS to make internal network structure split and finally imported Flac3d on Grotto whole seismic response simulation.The result showed that:the overall direction of displacement of rock caves of Yungang the 11th Grotto was a downward tilt with good stability over time and gradually downward portion with stress concentration.It was predicted that without taking protective measures for the bottom of the recessed portion weathering, the bottom of the cave would lead to instability in 100 years due to stress concentration destruction.Based on this corresponding reinforcement measures were proposed.
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