新型数字动态光弹性-数字散斑相关混合法的研究和应用

项目名称： 新型数字动态光弹性-数字散斑相关混合法的研究和应用

项目编号： No.11272239

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 杨国标

作者单位： 同济大学

项目金额： 78万元

中文摘要： 工程中越来越多的动态力学问题，与静态力学问题相比，由于实际动态问题的复杂性，采用实验的方法仍是目前解决这些问题的重要手段。近年来，随着计算机、高速摄影、图像处理等技术的迅速发展，为适应工程中越来越多动态力学问题的需求，采用动态光弹性法来研究应力波传播的规律，是一个直观、有效的方法，已广泛地应用于工程实际。但是在对动光弹实验数据进行分析时，如何得到应力场的定量结果，对主应力进行有效高精度的分离，是需要解决的关键问题之一。本研究首次将新型数字动态光弹性法与数字散斑相关法相结合，提出一种用于动光弹分离主应力的有效、高精度的新方法：新型数字动态光弹性-数字散斑相关混合法。在理论研究的基础上，设计了一套适合这种新方法的试验系统：新型数字动态光弹性-数字散斑相关实验系统，并通过相应的典型试件对该方法和试验系统的有效性做出分析和论证。在此基础上，将该方法及试验系统应用于某实际工程中某些关键部位在冲击载

中文关键词： 应力波；动态光弹性；数字散斑相关；图像处理；分离主应力

英文摘要： With the extra increasing changes of the engineering environment, a lot of dynamic problems have been paid much more considerable attention as practical engineering issues that should be urgently resolved in effect. Normally Compared with the static problems in realistic engineering, most of the dynamic problems are much more complex and difficult,even could not be solved with theory and Numerical calculation presently. The experiment remained the most important method of these problems in the key engineering. The dynamic photoelasticity is an effective and even more visual method for stress wave propagation study，and it is widely applied in major engineering practice, lots of problems have been overcome with this method．With the development of computer technology and science, high speed photography and digital image processing in these years have been greatly developped and applied a great quantity in essential engineering, and for this reason digital dynamic photoelasticity has been rapidly developed in recent years. But separation of principal stress is the one of the most important and difficult sections of data analysis in dynamic photoelasticity theory．Up to now this problem has still to be perplexing us directly. In this study, a new original solution, called New Digital-Dynamic Photoelasticity- Digital

英文关键词： stress wave；dynamic photoelasticity；digital speckle correlation；image processing；separation of principal stress