激光清洗石质文物表面油漆的理论分析
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摘要
从激光清洗石质文物的现状出发,建立了激光清洗石质文物表面油漆的一维热应力理论模型;然后从理论上得出激光清洗石质文物表面油漆时的温度场和应力场.结果表明,通过设置激光的各种参数,特别是激光的能量密度,可以使得在石质文物基底不被破坏的前提下,提高激光清洗的效率.理论分析可以更好的指导实际的激光清洗石质文物表面油漆的过程.
Based on the status of laser cleaning of the stone relics,a one-dimensional thermal stress theoretical model for laser cleaning of the surface paint of stone relics is established. Then the temperature field and stress field of laser cleaning of surface paint of stone relics are obtained theoretically. The results show that based on the premise that the substrate of stone relics is not damaged,by setting various parameters of laser,especially the energy density of laser,the efficiency of laser cleaning can be improved. Theoretical analysis can better guide the practical process of laser cleaning of surface paint of stone relics.
Based on the status of laser cleaning of the stone relics,a one-dimensional thermal stress theoretical model for laser cleaning of the surface paint of stone relics is established. Then the temperature field and stress field of laser cleaning of surface paint of stone relics are obtained theoretically. The results show that based on the premise that the substrate of stone relics is not damaged,by setting various parameters of laser,especially the energy density of laser,the efficiency of laser cleaning can be improved. Theoretical analysis can better guide the practical process of laser cleaning of surface paint of stone relics.
引文
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[9]齐扬,周伟强,陈静,等.激光清洗云冈石窟文物表面污染物的试验研究[J].安全与环境工程,2015,(2):32-38.
[2]Pouli P,Oujja M,Castillejo M.Practical issues in laser cleaning of stone and painted artefacts:optimisation procedures and side effects[J].Applied Physics A,2012,(2):447-464.
[3]Siano S,Agresti J,Cacciari I,et al.Laser cleaning in conservation of stone,metal,and painted artifacts:state of the art and new insights on the use of the Nd:YAG lasers[J].Applied Physics A,2012,(2):419-446.
[4]Bromblet P,Laboure M,Orial G.Diversity of the cleaning procedures including laser for the restoration of carved portals in France over the last 10years[J].Journal of Cultural Heritage,2003,(1):17-26.
[5]张秉坚,铁景沪.大型石质文物表面清洗技术的现状和发展趋势[J].石材,2007,(11):19-22.
[6]叶亚云,齐扬,袁晓东,等.利用激光清洗技术清除砂岩及光学元件表面污染物[J].中国激光,2012,(b06):117-122.
[7]Laboure M,Bromblet P,Orial G,et al.Assessment of laser cleaning rate on limestones and sandstones[J].Journal of Cultural Heritage,2000,(1):21-27.
[8]邹万芳,谢应茂,肖兴,et al.Application of thermal stress model to paint removal by Q-switched Nd:YAG laser[J].Chinese Physics B,2014,(7):433-438.
[9]齐扬,周伟强,陈静,等.激光清洗云冈石窟文物表面污染物的试验研究[J].安全与环境工程,2015,(2):32-38.