Development of stress analysis method by hybrid system combining photoelasticity with numerical method

光弹性与数值方法相结合的混合系统应力分析方法的发展

基本信息

批准号：
60460079
负责人：
OKAMURA Hiroyuki
金额：
$ 4.74万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

1.Development of high speed F.E.M system;We developed high performance stress analysis system by combining image processing system for photoelasticity with high speed F.E.M system. As the F.E.M system was developed on 16-bit micro-computer, on-line real time procedure can be executed efficiently.2.Development of video system for photoelastic analysis;We developed image processing system for photoelastic fringe by using micro-computer and image frame memory. Basic image processing software such as smoothing, filtering were also developed by using C-language.3.Development of conversational hybrid system;We developed conversational hybrid system, which can compare the result of FEM analysis with the experimental results of photoelasticity. In this system, boundary shape of the specimen is acknowledged by the image processing procedure and is converted to the coordinate data. Then, finite element mesh, which satisfy those boundary condition, are generated and FEM analvsis is executed. The isochromatic fringe positions are calculated from the FEM result and those are superimposed on the image moritor of photoelasticity. The difference of both results are detected easily and are feed-backed to the calculation.4.Stress analysis of complicated structure by developed system;By using the developed image processing system, we conducted stress analysis for contact problem and cracked body. As a contact problem, two different size circle plates are pressed on each other and the stress distribution is analysed by the developed system. We could not find the good method to attain the final answer easily, we confirmed that the difference of the result of two methods are detected easily by the hybrid system. For the crack problem, we developed new method to analyse the mode I stress intensity factor from the image data easily. The results are compared with the theoretical one and satisfactory results are obtained.

1.高速F.E.M系统的开发；我们通过将光弹处理系统与高速F.E.M系统相结合，开发了高性能应力分析系统。由于F.E.M系统是在16位微型计算机上开发的，因此可以有效地执行在线实时过程。2。视频系统进行光弹性分析的开发；我们通过使用微型计算机和图像框架内存开发了用于光弹性边缘的图像处理系统。基本图像处理软件（例如平滑，过滤）也通过使用C语言开发。3。对话杂交系统的开发；我们开发了对话杂种系统，可以将FEM分析的结果与光弹性的实验结果进行比较。在此系统中，图像处理过程确认了样品的边界形状，并将其转换为坐标数据。然后，生成满足这些边界条件的有限元网格并执行fem肛门。等视条纹位置是根据FEM结果计算得出的，而光弹性的图像媒体则叠加。两种结果的差异都很容易检测到馈送到计算中。4。通过开发系统对复杂结构的压力分析；通过使用开发的图像处理系统，我们对接触问题和破裂的身体进行了压力分析。作为接触问题，将两个不同大小的圆板互相按下，并通过开发的系统分析应力分布。我们找不到可以轻松获得最终答案的好方法，我们证实了混合系统很容易检测到两种方法的差异。对于裂纹问题，我们开发了新方法来轻松地分析图像数据的压力强度因子。将结果与理论上的结果进行了比较，并获得了令人满意的结果。