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一、引 言 云纹法(Moire method)是一种适用范围较广泛的实验应变分析方法.它所需仪器设备简单,操作方便易行,并且可以超越经典光弹性法的某些局限性.若将云纹法引进水工结构的应力分析实验中,则可以解决水工结构的非弹性、断裂、蠕变等问题,也可以解决动应力、高温测试等问题.从云纹试验获得的云纹图象是试件变形后的位移场.在实际工程问题中,人们所关心的多是结构的强度问题.因此,云纹法若要在工程实验中推广,就需要研究把云纹图位移场转变为应变场的精度较高的数据处理方法.
I. INTRODUCTION The Moire method is a widely applicable experimental strain analysis method. It requires simple equipment, easy operation, and can surpass some limitations of the classical photoelastic method. In the stress analysis experiment introduced by the moire method for hydraulic structures, problems such as inelasticity, fracture, and creep of hydraulic structures can be solved, and problems such as dynamic stress and high temperature testing can also be solved. Moiré patterns obtained from moire tests As the displacement field after the deformation of the specimen, in the actual engineering problems, people are mostly concerned with the strength of the structure. Therefore, if the moire method is to be promoted in engineering experiments, it is necessary to study the transformation of the moire pattern displacement field. High-precision data processing methods for strain fields.