中文摘要：

针对应用于实验应变分析中的发光光弹性涂层方法所采用的涂层结构（双涂层结构和单涂层结构）信号强度小、信噪比低的局限性,提出了1种改进的发光光弹性涂层结构.以罗丹明B为荧光染料,E-44型环氧树脂为光弹性材料,邻苯二甲酸二丁脂为增塑剂,二乙烯三胺为固化剂,制作了改进与未改进的2种不同结构的发光光弹性涂层,并以465 nm为激发波长,在Cary-100型紫外-可见分光光度计上对这2种涂层的荧光光谱进行测试.试验结果表明：改进的发光光弹性涂层在发射波长600 nm处的荧光信号强度是原有双涂层结构发光光弹性涂层强度的3.7倍,说明改进的涂层结构能够有效提高荧光信号的强度.

英文摘要：

In order to solve the shortcoming of relatively low signal-to-noise ratio of coating configurations（dual-layer coating and single-layer coating） in luminescent photoelastic coating method for experimental strain analysis,a new luminescent photoelastic coating configuration was introduced.Two luminescent photoelastic coatings with different configurations were prepared with identical luminescent dyes of Rhodamine B,photoelastic materials of E-44 Epoxy resin,plasticizers of Dibutyl phthalate and curing agents of Diethylenetriamine.Fluorescence emission spectra of the two luminescent photoelastic coatings were measured by Cary-100 fluorescence spectrophotometer with excitation wavelength of 465 nm.The intensity of the new single-layer luminescent coating at emission wavelength of 600 nm is 3.7 times stronger than that of the original dual-layer luminescent photoelastic coatings.Theoretical analysis and experimental results show that the new luminescent photoelastic coating configuration can remarkably improve signal-to-noise ratio and increase fluorescence emission intensity.